# 2009–10 Chilean general election

General elections were held in Chile on Sunday 13 December 2009 to elect the president, all 120 members of the Chamber of Deputies and 18 of the 38 members of the Senate were up for election. As no presidential candidate received a majority of the vote, a second round was held between the top two candidates—Sebastián Piñera and Eduardo Frei Ruiz-Tagle—on Sunday 17 January 2010. Piñera won the runoff with 52% of the vote and succeeded Michelle Bachelet on 11 March 2010.
In the Congressional elections, the centre-right Coalition for Change improved on the Alliance for Chile's result in 2005 by winning 58 seats in the Chamber of Deputies, while the governing center-left Concertación (CPD) was reduced to 57 seats. Three communist MPs were elected (Guillermo Teillier, Hugo Gutiérrez and Lautaro Carmona), while incumbent Speaker of the Chamber, Rodrigo Álvarez (UDI) was defeated by Marcela Sabat (RN).

## Background

Chilean politics is dominated by two main coalitions: the center-left Concert of Parties for Democracy (Concertación de Partidos por la Democracia), composed of the Christian Democrat Party, the Socialist Party, the Party for Democracy, and the Social Democrat Radical Party; and the center-right Alliance for Chile (Alianza por Chile), composed of the Independent Democratic Union and National Renewal. The Concertación selected former president Eduardo Frei Ruiz-Tagle as their candidate, while the Alianza chose former presidential candidate Sebastián Piñera, who is supported by the newly created Coalition for Change electoral group. The far-left Juntos Podemos Más pact selected former Socialist Party member Jorge Arrate as its candidate. Another former Socialist party member, deputy Marco Enríquez-Ominami (MEO), ran as independent.

## Presidential candidates

| Candidate | Endorsement | Political spectrum |
| Jorge Arrate Communist Party of Chile | Juntos Podemos Más New Left | Left |
| Marco Enríquez-Ominami Independent | New Majority for Chile Broad Social Movement | Center-left |
| Eduardo Frei Ruiz-Tagle Christian Democrat Party | Concertación Country Force | Center-left |
| Sebastián Piñera National Renewal | Coalition for Change | Center-right |

### Coalition for Change candidate

| Sebastián Piñera (RN) | Both Alliance for Chile parties —RN and UDI— chose Sebastián Piñera as their candidate for president, now under the banner of a larger electoral pact, the Coalition for Change, which also includes the newly formed party ChileFirst and other minor groups. |

#### Party pre-candidates

| Party | Candidate | Remarks |
| RN | Sebastián Piñera | Piñera participated in Hernán Büchi's 1989 presidential campaign and was later elected to the Senate. He was a potential presidential nominee in 1993, but his chances were ruined by a conflict with Evelyn Matthei that came to be known as Piñeragate. In 1999 he again attempted to be the nominee, but was defeated in the convention by Joaquín Lavín. In 2005 he shook the political scene by jumping into the first round independently of the UDI. Polls show him narrowly beating Frei in a runoff scenario. He was officially proclaimed by RN on 8 August 2009. He submitted his candidacy to the Electoral Service on 9 September 2009. |
| UDI | Sebastián Piñera | The UDI officially proclaimed Piñera as its candidate on 22 August 2009. Piñera had been proposed as the party's candidate by the UDI's Consejo Directivo in December 2008. Pre-candidates: Evelyn Matthei: She is the daughter of Air Force General Fernando Matthei, a member of the military junta that took power in the 1973 coup. She was a member of National Renewal, but in 1992 was embroiled in a conflict with Sebastián Piñera, ending with her leaving the party and joining the UDI. She has been mentioned as a potential UDI candidate, considering she is among the leading proponents of having the UDI bring its own candidate to the first round. She has said it would be "fun" to compete against Piñera. Longueira said on 9 October 2008 that she would be an excellent candidate. On 11 October 2008, she said she was willing to run for president. She announced her precandidacy on 14 October 2008. Potential candidates: Joaquín Lavín: He earned a master's degree in economics from the University of Chicago. Afterwards, in 1992, Lavín was elected mayor of Las Condes, a stronghold of the right, with 31% of the vote and reelected in 1997 with 78% of the vote. Lavín was the presidential candidate for the UDI-RN coalition Alliance for Chile in the 1999 election. He eventually lost to PS/PPD candidate Ricardo Lagos in a runoff by 200,000 votes. Lavín again represented UDI in the 2005 presidential election, but ended in third place with 23.23% of the vote, due to the presence of another right-wing candidate in the race, Sebastián Piñera, who made it to the runoff election with 25.41% of the vote. Pablo Longueira urged him to run for a third time for the presidential elections, but he refused and ended up running for a senate seat in the Valparaíso Region which he lost. Hernán Larraín: He is a senator and former president of the UDI. Longueira said on 9 October 2008 that he would be an excellent candidate. Declined candidacies: Hernán Büchi: A possible candidacy by the 1990 presidential candidate generated buzz within the UDI in June 2007. He has however declined a candidacy. Pablo Longueira: The senator officially launched his candidacy on 30 March 2007. He had announced his plans before the 2005 election took place. He stepped down "momentarily" due to "low party support" on 3 May 2007. Jacqueline van Rysselberghe: The mayor of Concepción was proclaimed, on 11 October 2006, as candidate by five UDI deputies from the Biobío Region. She has refused to campaign for the nomination, however, preferring to concentrate on her 2008 campaign for reelection as mayor. She was reelected as Concepción mayor in October 2008. |
| CH1 | Sebastián Piñera | ChileFirst decided to support Piñera on 29 March 2009 after its leader, senator Fernando Flores, declined to run for president. It officially proclaimed him on 15 August 2009. Declined candidacies: Fernando Flores: The former minister of Salvador Allende and current senator launched a failed presidential bid for the 2005 election. He resigned from the PPD in early 2007 and launched a new party, ChileFirst. On 29 March 2009 ChileFirst decided to support Piñera after Flores declined to run for president. |

### Concertación candidate

| Eduardo Frei Ruiz-Tagle (PDC) | The Concertación selected former president Eduardo Frei Ruiz-Tagle from the Christian Democrat Party as its single candidate for president. The selection process involved a single regional primary on 5 April 2009 in the Maule and O'Higgins regions between Frei and José Antonio Gómez Urrutia from the Social Democrat Radical Party. Frei won with 65% versus 35% for Gómez. Had the percentage difference between both candidates been less than 20%, the selection process would have continued with additional primaries in other regions until 17 May. Frei was legally proclaimed as presidential candidate by the PPD on 1 August 2009 and by the PDC, PS and PRSD on 22 August 2009. He submitted his candidacy to the Electoral Service on 12 September 2009. |

#### Party pre-candidates

Each Concertación party selected its own pre-candidate for president. Only Frei and Gómez submitted their candidacies before the 26 January 2009 deadline.
| Party | Candidate | Remarks |
| PRSD | José Antonio Gómez Urrutia | He was proclaimed by his party on 13 November 2008. He had announced his pre-candidacy two days earlier. |
| PDC | Eduardo Frei Ruiz-Tagle | He was proclaimed by his party on 13 December 2008. Other candidates: Pablo Lorenzini: On 16 December 2008, he said he was supporting Frei's candidacy. Marcelo Trivelli: He announced his candidacy on 10 June 2007 during a television interview. Despite his lack of a support base, he declared himself the candidate of "honesty and sincerity" and respect towards the Constitution. Trivelli received heavy criticism from his own party because of his decision to run, and many party members declared it was not the appropriate time for candidacies. Trivelli has embarked on a number of trips around the country in order to create enough support to sustain his candidacy. Declined candidacy: Soledad Alvear: She was constantly mentioned as a potential contender in 2009 ever since she resigned from her candidacy in favor of Bachelet. Her supporters, the alvearistas, controlled most of the PDC institutions and she commanded widespread support in the party, despite the vocal opposition of fellow Senator Adolfo Zaldívar. On 6 December 2007, she was unofficially proclaimed a presidential candidate by Christian Democrat deputy Pablo Lorenzini. She declared herself a candidate on 23 June 2008 during a television interview. On 28 October 2008, she stepped out of the race for the presidency and resigned as PDC president after disappointing results in the municipal elections held two days earlier. |
| PS | Eduardo Frei Ruiz-Tagle | The PS selected Frei as its candidate on 17 January 2009. He was the only person to submit a candidacy to the PS presidential convention. Declined candidacies: José Miguel Insulza: He declared himself a candidate on 12 December 2008. He, however, declined his candidacy on 5 January 2009, and gave his support to Frei. Ricardo Lagos: His government was highly popular and his term ended with approval ratings around 60-70%. Various supporters urged him to run again in 2009. However, his popularity has lately seen a sharp fall due to the catastrophic new transport system (Transantiago), planned under his presidency. Lagos has declared all doors are open to him, but has refused to confirm whether he will participate. In March 2008, he said it was unbecoming as a former head of state to participate in a primary and would refuse to do so. On 8 November 2008, he was proclaimed unanimously by the PPD's National Directive as its candidate, but Lagos never accepted the nomination. On 2 December 2008, the PPD officially proclaimed Lagos as its candidate for the presidency. However, two days later, Lagos ruled out running for the presidency, stating in a press conference "I am not, nor will I be, a presidential candidate". |
| PPD | Eduardo Frei Ruiz-Tagle | The PPD selected Frei as its candidate on 24 January 2009, with 296 votes from the party's National Council, against seven for PRSD candidate José Antonio Gómez Urrutia. Other candidates: Sergio Bitar: In a 4 May 2007 interview with La Tercera, he said he was willing to be his party's presidential nominee if there was enough support. On 7 November 2008 he said that he is "without a doubt" willing to compete eventually for the presidency, but only if Ricardo Lagos's candidacy does not prosper. He declined his candidacy on 10 November 2008, following Lagos's proclamation by his party. Now that Lagos is out of the race, he may attempt a second run. Nicolás Eyzaguirre: He has said that he could participate if Lagos declines to, but he remained silent after Lagos declined his candidacy. Ricardo Lagos: On 4 December 2008 he ruled out running for the presidency, stating in a press conference "I am not, nor will I be, a presidential candidate". |
| Independent candidates | None | Failed candidacies: Marco Enríquez-Ominami: On 15 December 2008, he announced he was available to compete with Insulza in a Socialist Party primary. He, however, did not submit his candidacy to the PS presidential convention. On 9 January 2009, he agreed to compete in the Concertación primaries as independent after gaining the support of some council people and legislators. |

#### Primary results

The primary was carried out on 5 April 2009 in the Maule and O'Higgins regions. Frei became the single Concertación candidate by beating Gómez by a 20-point lead, cancelling the need for further regional primaries.
Final results.
| Candidate | Party | Votes | % | Result |
| Eduardo Frei Ruiz-Tagle | DC | 40,140 | 64.90 | Concertación candidate |
| José Antonio Gómez Urrutia | PRSD | 21,703 | 35.09 | |
| Valid votes | Valid votes | 61,843 | 100 | |
| Null votes | Null votes | 222 | 0.35 | |
| Blank votes | Blank votes | 317 | 0.50 | |
| Total votes | Total votes | 62,382 | 100 | |

### Juntos Podemos candidate

| Jorge Arrate (Communist Party of Chile) | The Juntos Podemos Más coalition of far-left parties selected former Socialist Party member Jorge Arrate as its sole candidate for president on 25 April 2009. He was officially proclaimed as candidate on 26 April 2009. In July 2009, after his candidacy lost the support of the Humanist Party, he became a member of the Communist Party in order to comply with the law and run for president. He submitted his candidacy to the Electoral Service on 9 September 2009. |

#### Party pre-candidates

| Party | Candidate | Remarks |
| PCCh | Guillermo Teillier | Teillier launched his candidacy on 26 September 2008. He said he is willing to step down in order to put forward a single candidate for the Juntos Podemos coalition of left-parties. In November 2008 he said he would be willing to participate in a primary between him, Hirsch and Alejandro Navarro, who had quit the Socialist Party. Teillier stepped down as Juntos Podemos pre-candidate on 25 April 2009, giving his support to Jorge Arrate, saying he was the right person according to the country's political moment. |
| PH | Tomás Hirsch | Hirsch was among the founders of the Humanist Party and vied unsuccessfully for seats in the Chamber of Deputies as part of the Concertación. In 1993, the PH broke off from the coalition. In 1999 he was the Humanist presidential candidate, but lost in the first round. In 2005, he again participated in the presidential campaign, now with the additional support of the communists. He garnered a little over 5% of the vote. In an interview with Biobío Radio on 1 September 2007, Hirsch criticized the Concertación and the Alianza and declared that he would he "happy to be a candidate" if the members of his coalition agree. On 7 June 2008 he announced he intended to run for the presidency for the third time as the PH candidate, under the Juntos Podemos umbrella. |
| Independent (Socialista-allendista) | Jorge Arrate | Arrate is a member of the more leftist faction of the PS and had been mentioned as a potential candidate in an alliance of this faction and the Juntos Podemos Más pact. He formally announced his candidacy on 27 January 2008, pressured by a group of socialists opposed to the Socialist Party leadership. On 20 November 2008, Arrate was proclaimed as candidate by a group of Socialist Party Central Committee members. Arrate resigned from the PS on 14 January 2009. He was proclaimed as presidential candidate on 18 January 2009 by a group of Socialist Party members, the so-called "socialistas-allendistas". |

#### Primary results

The election to define the sole Juntos Podemos candidate was carried out on 25 April 2009 in Santiago. Arrate beat Hirsch and became the single Juntos Podemos candidate.
Final results.
| Candidate | Party | Votes | % | Result |
| Jorge Arrate | Ind. | 1,145 | 77.57 | Juntos Podemos candidate |
| Tomás Hirsch | PH | 331 | 22.42 | |
| Valid votes | Valid votes | 1,476 | 100 | |
| Null votes | Null votes | 6 | 0.40 | |
| Blank votes | Blank votes | 2 | 0.13 | |
| Total votes | Total votes | 1,484 | 100 | |

### Independent candidate

| Marco Enríquez-Ominami (Ind.) | On 15 December 2008, he announced he was available to compete with Insulza in a Socialist Party primary. He, however, did not submit his candidacy to the PS presidential convention. On 9 January 2009, he agreed to compete in the Concertación primaries as independent after gaining the support of some council people and legislators. He did not submit his candidacy, however. Instead he is running as an independent and as of August 2009, polling above 20% and thus threatening to displace one of the coalition-backed candidates in the expected run-off election. He was proclaimed candidate by the Humanist and Ecologist parties plus several other leftist groups under the banner of a new electoral pact, a New Majority for Chile, on 13 September 2009. He submitted his candidacy to the Electoral Service on 10 September 2009. |

### Unsuccessful candidacies

* Eduardo Artés (PC (AP)): He was proclaimed as a Juntos Podemos Más pre-candidate by the Communist Party (Proletarian Action) on 7 December 2007. However, on 26 July 2008, the PC (AP) left the Juntos Podemos Más pact, accusing them of abandoning their founding principles in light of the pact's electoral deal with the Concertación for the upcoming October municipal elections. He quit his candidacy in July 2009. He said his candidacy was just an opportunity to present new ideas to the country, as going through with the candidacy would be too economically onerous.
* Leonardo Farkas (Ind.): A mining businessman. On 5 December 2008, he announced he was giving up his presidential candidacy.
* Pamela Jiles (Ind.): Journalist and television presenter. She announced her candidacy in February 2009 through a column in The Clinic magazine. On 4 September 2009 she stepped out of the race in support of Navarro. In the same election, she unsuccessfully ran for a seat in the lower chamber of Congress.
* Luis Molina Vega (Ind.) A civil engineer from Tomé. Molina stepped out of the race in July 2009, due to low support.
* Alejandro Navarro (MAS): Navarro used to characterize himself as a leader in the "dissident" faction of the Socialist Party, which harshly criticized what they called the "neoliberal" economic model, supporting instead Hugo Chávez and Fidel Castro. Despite his involvement in a scandal due to his participation in a protest organized by the Unitary Workers Central where he attacked a policeman, with the possibility of being expelled from the Senate being considered, Navarro declared himself to be a presidential candidate in 2008. In November 2008, he quit the Socialist Party to form a new party called Broad Social Movement (MAS). He said his candidacy was necessary to "stop Piñera from winning in the first round", and still considered himself a Socialist. The MAS party proclaimed him its candidate on 11 November 2008; the party, however, was still open to stage a primary between all leftist candidates that were not part of the Concertación. Navarro has proposed to hold the primary in April 2009. On 5 May 2009 Navarro said he would step out of the race and support Arrate if polls released from then to September show the Juntos Podemos Más candidate having an advantage of seven points over him. He didn't rule out Arrate then supporting Enríquez-Ominami, if his candidacy was the strongest. Navarro was proclaimed as the official MAS candidate on 25 July 2009 with the support of other minor left groups. He submitted his candidacy to the Electoral Service on 14 September 2009. On 22 September 2009 Navarro withdrew his candidacy and gave his support to Enríquez-Ominami.
* Adolfo Zaldívar (PRI): The former president of the Christian Democratic Party and a Senator at the time of his nomination, lost the last internal PDC primary to Alvear. He is the brother of senator and former Interior Minister Andrés Zaldívar. He was expelled from the PDC in December 2007, later becoming part of the Regionalist Party of the Independents (PRI). He announced his intention to run as president representing that party, and was proclaimed so on 26 April 2009. This decision was ratified on 29 August 2009. He stepped out of the race on 14 September 2009, just hours before the deadline for submission.

## Coalitions for the Congressional elections
### Concertación and Juntos Podemos Más

The A list conformed after the union of two political coalitions that had taken part separately in the elections of 2005. On one hand the Concertación, which was grouping to the center-left parties that since 1990 governed the country. In the other hand the left-wing Juntos Podemos Más, that it suffered an internal division after the exit of the Humanist Party.
The reason of this strange union was, the Binomial System that get out the political left from the National Congress since 1994.
The largest party inside the A list was the Christian Democrats, with the leadership of Juan Carlos Latorre who was chief of the Eduardo Frei's presidential campaign. The Socialists joined with the senator Camilo Escalona, PPD with the deputy Pepe Auth. The Radicals led by Senator Gómez, and the Communist Party with the leadership of Guillermo Teillier.

### Coalition for Change

The Alliance for Chile for the elections of 2009, began with an important step, by means of I arrive of two precandidates, one of them the senator Pablo Longueira, and the mayor of Concepción, Jacqueline van Rysselberghe, both of the Independent Democratic Union, who demonstrated his availability of postulating to this post, using the regular conduits inside the coalition, nevertheless, both rejected such an option to present only a presidential candidate, who would be Sebastián Piñera.
In March 2009 two Congressmen of the Alliance for Chile obtained the speaker of the Senate and the speaker of the Deputies' Chamber, by means of an agreement with the independent bench and with the Concert, respectively. The above mentioned agreements were not lacking in polemic, since the Senator who postulated the alliance to preside at the above mentioned organism, Jovino Novoa, was harshly criticized for personeros of the Concert in view of his past as member of Augusto Pinochet Ugarte's military regime.
In spite of the critiques, the Alliance for Chile awarded a political victory on having presided at both chambers of the National Congress and some of the most influential commissions of the same one, which, they waited in the conglomerate opponent, he was benefiting Sebastián Piñera's candidacy.
After having integrated the list Clean Chile, Vote Happy, one was generated fail between the charter members of ChileFirst with regard to the position that would take the party opposite to the presidential and parliamentary elections of 2009. Whereas Jorge Schaulsohn and Senator Flores supported the candidate of the Alliance for Chile Sebastián Piñera, the deputy Esteban Valenzuela rejected to join with the center-right and resigned ChileFirst to endorse Marco Enríquez-Ominami's candidacy. The support to Piñera on the part of ChileFirst was made official on 6 May 2009, when one presented the "Coalition for the Change", electoral agreement between the Alliance for Chile, ChileFirst and other political minor movements.

### New Majority for Chile

New Majority for Chile was a political coalition that grouped the Ecologist party of Chile, the Humanist Party of Chile, and diverse political and independent movements that supported the candidacy of the independent Marco Enríquez-Ominami for the presidential election of 2009. Between the movements and groups without political legal constitution that they it shaped are the Regionalist Movement, the Movement Unified of Sexual Minorities (MUMS), the Movement SurDA and the Progressist Network.

## Slogans

| Party | Slogan |
| Christian Democrat | With you, will live better. Live dreaming a new sun |
| Radical Social Democrat | A change must be Radical |
| Socialist | Socialist Heart |
| PPD | Let's break the Ice |
| Communist | ¡United we can! |
| RN | With your vote today it's possible |
| UDI | The motor of popular change. |
| Regionalist | We are hope, We are future |
| Humanist | We are the new majority |

## Opinion polls
### Presidential election

List of opinion polls released within a year of the election. Only responses from persons registered to vote are shown.
Legend :
* Not on the list
* Wins election
* May win election
* Runoff
* May go to a runoff

#### First-round scenarios

| Publisher | Field date | Date published | Arrate | MEO | Frei | Piñera | Other | DK/NR | Comments |
| CEP | 19 November – 11 December 2008 | 30 December 2008 | — | — | 31 | 41 | 7 | 21 | Source |
| La Segunda | 18 December 2008 | 19 December 2008 | — | — | 36 | 46 | 6 | 12 | Source |
| La Segunda | 6 April 2009 | 7 April 2009 | 1 | 4 | 33 | 43 | 7 | 12 | Source |
| La Tercera | 6–7 April 2009 | 12 April 2009 | — | 3 | 33 | 42 | 7 | 15 | Source |
| Imaginacción | 4–26 April 2009 | 11 May 2009 | — | 10.5 | 32.4 | 38.3 | 7.6 | 11.2 | Source |
| TNS Time | 1–30 April 2009 | 5 May 2009 | — | 14 | 29 | 36 | 7 | 14 | Source |
| La Tercera | 21–23 April 2009 | 26 April 2009 | — | 10 | 28 | 35 | 7 | 20 | Source |
| Ipsos | — | April 2009 | 0.3 | 5.1 | 25.4 | 43.3 | 0 | 25.9 | Source |
| La Segunda | 14 May 2009 | 15 May 2009 | 1 | 14 | 27 | 42 | 4 | 12 | Source |
| Imaginacción | 2–30 May 2009 | 11 June 2009 | 0.5 | 20.9 | 29.9 | 34.9 | 5.6 | 8.2 | Source |
| TNS Time | 4–30 May 2009 | 2 June 2009 | 1 | 24 | 25 | 33 | 3 | 14 | Source |
| CEP | 14 May – 3 June 2009 | 18 June 2009 | 1 | 14 | 30 | 34 | 3 | 19 | Response to a questionnaire. (Source) |
| CEP | 14 May – 3 June 2009 | 18 June 2009 | 1 | 13 | 30 | 37 | 3 | 16 | Ballot box vote. (Source) |
| Ipsos | 18 May – 1 June 2009 | 9 June 2009 | 1.4 | 20.6 | 24.9 | 34.4 | 2.5 | 16.2 | Source |
| Imaginacción | 1–30 June 2009 | 14 July 2009 | 2.3 | 21.5 | 28.2 | 35.9 | 2.7 | 9.4 | Source |
| Mori | 27 June – 9 July 2009 | 23 July 2009 | 1 | 13 | 21 | 43 | 3 | 19 | Source |
| La Segunda | 8 July 2009 | 10 July 2009 | 2 | 15 | 27 | 38 | 3 | 15 | Source |
| Imaginacción | 1–31 July 2009 | 12 August 2009 | 3.5 | 21.9 | 26.7 | 36.7 | 1.7 | 9.5 | Source |
| La Tercera | 20–22 July 2009 | 26 July 2009 | 2 | 21 | 25 | 30 | 2 | 20 | Source |
| CERC | 17 July – 3 August 2009 | 12 August 2009 | 1 | 14 | 25 | 39 | 1 | 20 | Source |
| Ipsos | 24 July – 6 August 2009 | 19 August 2009 | 1.5 | 20.6 | 22.9 | 35.6 | 2.1 | 17.3 | Source |
| Direct Media | 5–6 August 2009 | 12 August 2009 | 1.63 | 15.48 | 21.28 | 34.43 | 1.32 | 25.86 | Source |
| La Segunda | 12 August 2009 | 14 August 2009 | 1 | 20 | 24 | 39 | 1 | 15 | Source |
| Imaginacción | 1–29 August 2009 | 14 September 2009 | 2.3 | 20.5 | 28.2 | 37.8 | 2.4 | 10.3 | Source |
| CEP | 30 July – 20 August 2009 | 3 September 2009 | 1 | 16 | 30 | 35 | 2 | 16 | Response to a questionnaire. (Source) |
| CEP | 30 July – 20 August 2009 | 3 September 2009 | 1 | 17 | 28 | 37 | 2 | 15 | Ballot box vote. (Source) |
| Imaginacción | 1–30 September 2009 | 14 October 2009 | 4.5 | 20.4 | 25.7 | 38.4 | 1.7 | 9.3 | Source |
| La Segunda | 24 September 2009 | 25 September 2009 | 4 | 19 | 23 | 39 | 0 | 15 | Source |
| Ipsos | 16 September – 6 October 2009 | 21 October 2009 | 3.7 | 17.8 | 27.2 | 36.7 | 0.3 | 14.3 | Source |
| UDP | 21 September – 13 October 2009 | 28 October 2009 | 4.1 | 17.3 | 23.7 | 30.3 | 0.6 | 24.0 | Source |
| La Tercera | 5–8 October 2009 | 10 October 2009 | 6 | 24 | 20 | 39 | 0 | 11 | Source |
| CERC | 2–13 October 2009 | 20 October 2009 | 3 | 20 | 20 | 41 | 0 | 16 | Source |
| El Mercurio-Opina | 10–12 October 2009 | 18 October 2009 | 4.9 | 21.5 | 22.8 | 38.0 | 0 | 12.7 | Source |
| Giro País-Subjetiva | 9–20 October 2009 | 31 October 2009 | 4.7 | 19.3 | 28.6 | 36.9 | 0 | 10.5 | Source |
| Imaginacción | 1–31 October 2009 | 16 November 2009 | 6.4 | 22.3 | 27.0 | 37.8 | 0 | 6.5 | Source |
| CEP | 8–30 October 2009 | 11 November 2009 | 4 | 17 | 26 | 35 | 0 | 18 | Response to a questionnaire. (Source) |
| CEP | 8–30 October 2009 | 11 November 2009 | 5 | 19 | 26 | 36 | 0 | 14 | Ballot box vote. (Source) |
| El Mercurio-Opina | 3–4 November 2009 | 7 November 2009 | 6.1 | 20.4 | 21.5 | 38.0 | 0 | 14.0 | Ballot box vote. (Source) |
| La Segunda | 18 November 2009 | 20 November 2009 | 7 | 20 | 24 | 38 | 0 | 11 | Source |
| El Mercurio-Opina | 5–6 December 2009 | 9 December 2009 | 6.8 | 19.5 | 22.6 | 38.2 | 0 | 12.9 | Ballot box vote. (Source) |
DK/NR: Don't know / No response.

#### Runoff scenarios
##### Frei vs. Piñera

| Publisher | Field date | Date published | Frei | Piñera | DK/NR | Comments |
| CEP | 19 November – 11 December 2008 | 30 December 2008 | 34 | 44 | 22 | Source |
| Imaginacción | 6–28 December 2008 | 8 January 2009 | 42.5 | 44.8 | 12.7 | Source |
| La Segunda-UDD | 18 December 2008 | 19 December 2008 | 38 | 46 | 16 | Source |
| TNS Time | January 2009 | 31 January 2009 (unverified) | 40 | 45 | 15 | Source |
| Imaginacción | 3–31 January 2009 | 6 February 2009 | 42.3 | 45.6 | 12.1 | Source |
| TNS Time | 2–26 February 2009 | 10 March 2009 (unverified) | 38 | 43 | 19 | Source |
| Imaginacción | 7–28 February 2009 | 4 March 2009 | 43.4 | 46.8 | 9.8 | Source |
| La Segunda-UDD | 5 March 2009 | 6 March 2009 | 37 | 46 | 17 | Source |
| TNS Time | 2–30 March 2009 | 31 March 2009 | 41 | 39 | 20 | Source |
| Imaginacción | 2–31 March 2009 | 8 April 2009 | 44.3 | 44.7 | 11.0 | Source |
| La Segunda-UDD | 6 April 2009 | 7 April 2009 | 39 | 45 | 16 | Source |
| La Tercera | 6–7 April 2009 | 12 April 2009 | 40 | 46 | 14 | Source |
| Imaginacción | 4–26 April 2009 | 11 May 2009 | 43.2 | 43.8 | 13.0 | Source |
| TNS Time | 1–30 April 2009 | 5 May 2009 | 41 | 43 | 16 | Source |
| CERC | 13–27 April 2009 | 14 May 2009 | 33 | 47 | 20 | Source |
| La Tercera | 21–23 April 2009 | 26 April 2009 | 39 | 43 | 18 | Source |
| Giro País-Subjetiva | 30 April – 10 May 2009 | 16 May 2009 | 40.8 | 37.9 | 21.3 | Source |
| La Segunda-UDD | 14 May 2009 | 15 May 2009 | 34 | 44 | 22 | Source |
| Imaginacción | 2–30 May 2009 | 11 June 2009 | 43.1 | 44.2 | 12.7 | Source |
| TNS Time | 4–30 May 2009 | 2 June 2009 | 38 | 43 | 19 | Source |
| CEP | 14 May – 3 June 2009 | 18 June 2009 | 39 | 39 | 22 | Response to a questionnaire. (Source) |
| CEP | 14 May – 3 June 2009 | 18 June 2009 | 39 | 41 | 20 | Ballot box vote. (Source) |
| Ipsos | 18 May – 1 June 2009 | 9 June 2009 | 39.6 | 42.3 | 18.1 | Source |
| Imaginacción | 1–30 June 2009 | 14 July 2009 | 41.9 | 43.3 | 14.8 | Source |
| MORI | 27 June – 9 July 2009 | 23 July 2009 | 30 | 46 | 24 | Source |
| La Segunda-UDD | 8 July 2009 | 10 July 2009 | 39 | 43 | 18 | Source |
| Imaginacción | 1–31 July 2009 | 12 August 2009 | 42.8 | 44.5 | 12.7 | Source |
| CERC | 17 July – 3 August 2009 | 12 August 2009 | 36 | 44 | 20 | Source |
| Ipsos | 24 July – 6 August 2009 | 19 August 2009 | 38.1 | 45.5 | 16.4 | Source |
| Direct Media | 5–6 August 2009 | 12 August 2009 | 30.97 | 40.89 | 28.14 | Source |
| CEP | 30 July – 20 August 2009 | 3 September 2009 | 39 | 39 | 22 | Response to a questionnaire. (Source) |
| CEP | 30 July – 20 August 2009 | 3 September 2009 | 39 | 42 | 19 | Ballot box vote. (Source) |
| La Segunda-UDD | 12 August 2009 | 14 August 2009 | 36 | 45 | 19 | Source |
| Imaginacción | 1–29 August 2009 | 14 September 2009 | 42.6 | 44.6 | 12.8 | Source |
| Imaginacción | 1–30 September 2009 | 14 October 2009 | 42.2 | 45.2 | 12.6 | Source |
| La Segunda-UDD | 24 September 2009 | 25 September 2009 | 38 | 47 | 15 | Source |
| Ipsos | 16 September – 6 October 2009 | 21 October 2009 | 39.6 | 44.5 | 15.9 | Source |
| UDP | 21 September – 13 October 2009 | 28 October 2009 | 36.3 | 35.5 | 28.2 | Source |
| La Tercera | 5–8 October 2009 | 10 October 2009 | 39 | 48 | 13 | Source |
| El Mercurio-Opina | 10–12 October 2009 | 18 October 2009 | 38.1 | 42.5 | 19.4 | Ballot box vote. (Source) |
| Giro País-Subjetiva | 9–20 October 2009 | 31 October 2009 | 42.0 | 42.2 | 15.8 | Source |
| Imaginacción | 1–31 October 2009 | 16 November 2009 | 42.1 | 45.8 | 12.1 | Source |
| CEP | 8–30 October 2009 | 11 November 2009 | 36 | 40 | 24 | Response to a questionnaire. (Source) |
| CEP | 8–30 October 2009 | 11 November 2009 | 37 | 43 | 20 | Ballot box vote. (Source) |
| El Mercurio-Opina | 3–4 November 2009 | 7 November 2009 | 36.8 | 42.7 | 20.5 | Ballot box vote. (Source) |
| La Segunda-UDD | 18 November 2009 | 20 November 2009 | 37 | 47 | 16 | Source |
| El Mercurio-Opina | 5–6 December 2009 | 9 December 2009 | 34.4 | 42.5 | 23.1 | Ballot box vote. (Source) |
| El Mercurio-Opina | 15–17 December 2009 | 19 December 2009 | 39.7 | 46.2 | 14.1 | Ballot box vote. (Source) |
| La Segunda-UDD | 17 December 2009 | 18 December 2009 | 43 | 48 | 9 | Source |
| El Mercurio-Opina | 5–7 January 2010 | 9 January 2010 | 41.0 | 46.1 | 12.9 | Ballot box vote. (Source) |
DK/NR: Don't know / No response.

##### Enríquez-Ominami vs. Piñera

| Publisher | Field date | Date published | MEO | Piñera | DK/NR | Comments |
| La Segunda-UDD | 14 May 2009 | 15 May 2009 | 37 | 45 | 18 | Source |
| MORI | 27 June – 9 July 2009 | 23 July 2009 | 23 | 47 | 30 | Source |
| La Segunda-UDD | 8 July 2009 | 10 July 2009 | 36 | 45 | 19 | Source |
| La Tercera | 20–22 July 2009 | 26 July 2009 | 22 | 49 | 29 | Source |
| CERC | 17 July – 3 August 2009 | 12 August 2009 | 29 | 44 | 27 | Source |
| Ipsos | 24 July – 6 August 2009 | 19 August 2009 | 40.3 | 43.6 | 16.1 | Source |
| Direct Media | 5–6 August 2009 | 12 August 2009 | 31.29 | 38.88 | 29.83 | Source |
| CEP | 30 July – 20 August 2009 | 3 September 2009 | 33 | 40 | 27 | Response to a questionnaire. (Source) |
| CEP | 30 July – 20 August 2009 | 3 September 2009 | 34 | 44 | 22 | Ballot box vote. (Source) |
| La Segunda-UDD | 12 August 2009 | 14 August 2009 | 37 | 45 | 18 | Source |
| Imaginacción | 1–30 September 2009 | 14 October 2009 | 39.3 | 45.9 | 14.8 | Source |
| La Segunda-UDD | 24 September 2009 | 25 September 2009 | 40 | 47 | 13 | Source |
| Ipsos | 16 September – 6 October 2009 | 21 October 2009 | 42.3 | 42.8 | 14.9 | Source |
| UDP | 21 September – 13 October 2009 | 28 October 2009 | 36.4 | 34.0 | 29.6 | Source |
| La Tercera | 5–8 October 2009 | 10 October 2009 | 43 | 44 | 13 | Source |
| El Mercurio-Opina | 10–12 October 2009 | 18 October 2009 | 40.3 | 42.9 | 16.8 | Ballot-box vote. (Source) |
| Giro País-Subjetiva | 9–20 October 2009 | 31 October 2009 | 41.1 | 40.2 | 18.7 | Source |
| Imaginacción | 1–31 October 2009 | 16 November 2009 | 42.7 | 43.4 | 13.9 | Source |
| CEP | 8–30 October 2009 | 11 November 2009 | 35 | 37 | 28 | Response to a questionnaire. (Source) |
| CEP | 8–30 October 2009 | 11 November 2009 | 37 | 40 | 23 | Ballot box vote. (Source) |
| El Mercurio-Opina | 3–4 November 2009 | 7 November 2009 | 37.7 | 41.9 | 20.4 | Ballot-box vote. (Source) |
| La Segunda-UDD | 18 November 2009 | 20 November 2009 | 40 | 44 | 16 | Source |
| El Mercurio-Opina | 5–6 December 2009 | 9 December 2009 | 34.8 | 40.7 | 24.5 | Ballot-box vote. (Source) |
DK/NR: Don't know / No response.

##### Arrate vs. Piñera

| Publisher | Field date | Date published | Arrate | Piñera | DK/NR | Comments |
| La Tercera | 5–8 October 2009 | 10 October 2009 | 33 | 51 | 16 | Source |
DK/NR: Don't know / No response.

##### Enríquez-Ominami vs. Frei

| Publisher | Field date | Date published | MEO | Frei | DK/NR | Comments |
| UDP | 21 September – 13 October 2009 | 28 October 2009 | 32.3 | 31.9 | 35.8 | Source |
DK/NR: Don't know / No response.

## Debates

The first debate was organized by TVN and took place in Studio #9 at the station's main headquarters in Santiago. It was broadcast live on 23 September 2009 at 10:40 p.m and included all four candidates. A poll published by Ipsos the following day, showed that Enríquez-Ominami, Arrate and Piñera were each considered to have had the best performance over the rest, with 29-30% of support, while Frei's showing only had the support of 9%. Frei was seen by 45% as the worst performer, followed by Piñera (37%), Arrate (10%) and Enríquez-Ominami (5%). Another poll by La Segunda found 23% thought Piñera had won the debate, followed by Arrate (21%), Enríquez-Ominami (15%) and Frei (9%). 31% thought none had won the debate.
The second debate was organized by Archi (Radio Broadcasters Association) and Mayor University. It took place at 8:30 AM on 9 October 2009. It was a radio-only debate, though some local 24-hour news channels broadcast live some parts of it. A poll carried out by Mayor University showed Piñera had won the debate by 41%, followed by Enríquez-Ominami (22%), Arrate (19%) and Frei Ruiz-Tagle (17%).
There was an online debate on 4 November, organized by Terra and Radio Cooperativa. Only Arrate was present after the other three candidates declined to attend. Frei and Piñera had confirmed their presence in May, while Enríquez-Ominami backed down on the same day of the debate.
A debate to discuss regional issues took place on 6 November at 9 AM in Talca's casino. It was organized by the National Press Association (ANP) and was attended by all four candidates.
A fifth debate took place on 9 November at Canal 13's studios in Santiago, which was broadcast live at 10 PM. All four candidates were present. This debate was notable because the candidates were able to ask questions to one another and freely talk to each other.
The last debate of the first round was organized by the National Television Association (Anatel) and broadcast live on 16 November at 10 PM by all terrestrial television stations. All candidates attended. There was no audience present.
For the second round, there was a single debate between the two candidates. It was organized by Anatel and broadcast at 10 PM by all terrestrial television stations on 11 January 2010.

## Results
### President

On 20 December 2009, the Juntos Podemos Más coalition gave its support to Eduardo Frei's candidacy, after the former president agreed to include a number of policies into his government program. Two days later, Jorge Arrate also gave his full support to Frei. On 13 January 2010 Enríquez-Ominami held a press conference to state that he would vote for Frei, although he did not say his name. He had previously said that voting for Piñera would be a regression and voting for Frei would not be an advancement.
| Candidate | Candidate | Party | First round | First round | Second round | Second round |
| Candidate | Candidate | Party | Votes | % | Votes | % |
| | Sebastián Piñera | Coalition for Change (RN) | 3,074,164 | 44.06 | 3,591,182 | 51.61 |
| | Eduardo Frei Ruiz-Tagle | Concertación (PDC) | 2,065,061 | 29.60 | 3,367,790 | 48.39 |
| | Marco Enríquez-Ominami | New Majority for Chile (Ind.) | 1,405,124 | 20.14 | | |
| | Jorge Arrate | Juntos Podemos Más (PCCh) | 433,195 | 6.21 | | |
| Total | Total | Total | 6,977,544 | 100.00 | 6,958,972 | 100.00 |
| Valid votes | Valid votes | Valid votes | 6,977,544 | 96.05 | 6,958,972 | 96.61 |
| Invalid/blank votes | Invalid/blank votes | Invalid/blank votes | 286,592 | 3.95 | 244,399 | 3.39 |
| Total votes | Total votes | Total votes | 7,264,136 | 100.00 | 7,203,371 | 100.00 |
| Registered voters/turnout | Registered voters/turnout | Registered voters/turnout | 8,285,186 | 87.68 | 8,285,186 | 86.94 |
| Source: SERVEL (first round) SERVEL (second round) |||||||

### Chamber of Deputies

| | Concertación & Juntos Podemos | | Christian Democratic Party | 940,265 | 14.21 | 19 | –1 |
| | Concertación & Juntos Podemos | | Party for Democracy | 839,744 | 12.69 | 18 | –3 |
| | Concertación & Juntos Podemos | | Socialist Party | 653,367 | 9.88 | 11 | –4 |
| | Concertación & Juntos Podemos | | Social Democratic Radical Party | 251,456 | 3.80 | 5 | –2 |
| | Concertación & Juntos Podemos | | Communist Party of Chile | 133,718 | 2.02 | 3 | +3 |
| | Concertación & Juntos Podemos | | Independents | 115,828 | 1.75 | 1 | –1 |
| | Concertación & Juntos Podemos | Total | Total | 2,934,378 | 44.35 | 57 | –8 |
| | Coalition for Change | | Independent Democratic Union | 1,525,000 | 23.05 | 37 | +4 |
| | Coalition for Change | | National Renewal | 1,178,392 | 17.81 | 18 | –1 |
| | Coalition for Change | | ChileFirst | 18,021 | 0.27 | 0 | New |
| | Coalition for Change | | Independents | 153,261 | 2.32 | 3 | +1 |
| | Coalition for Change | Total | Total | 2,874,674 | 43.45 | 58 | +4 |
| | Clean Chile, Vote Happy | | Regionalist Independent Party | 264,466 | 4.00 | 3 | +2 |
| | Clean Chile, Vote Happy | | Broad Social Movement | 26,440 | 0.40 | 0 | New |
| | Clean Chile, Vote Happy | | Independents | 65,892 | 1.00 | 0 | – |
| | Clean Chile, Vote Happy | Total | Total | 356,798 | 5.39 | 3 | New |
| | New Majority for Chile | | Humanist Party | 95,177 | 1.44 | 0 | 0 |
| | New Majority for Chile | | Ecologist Party | 3,815 | 0.06 | 0 | New |
| | New Majority for Chile | | Independents | 203,635 | 3.08 | 0 | – |
| | New Majority for Chile | Total | Total | 302,627 | 4.57 | 0 | New |
| | Independents | Independents | Independents | 147,379 | 2.23 | 2 | +1 |
| Total | Total | Total | Total | 6,615,856 | 100.00 | 120 | 0 |
| Valid votes | Valid votes | Valid votes | Valid votes | 6,615,856 | 91.08 | | |
| Invalid/blank votes | Invalid/blank votes | Invalid/blank votes | Invalid/blank votes | 647,681 | 8.92 | | |
| Total votes | Total votes | Total votes | Total votes | 7,263,537 | 100.00 | | |
| Registered voters/turnout | Registered voters/turnout | Registered voters/turnout | Registered voters/turnout | 8,285,186 | 87.67 | | |
| Source: SERVEL ||||||||

#### List of elected deputies 2010–2014

| District | Deputy | Party | Votes | % |
| 1$^{[d]}$ | Orlando Vargas Pizarro | Ind-PPD | 22 425 | 30,01 % |
| 1$^{[d]}$ | Nino Baltolú Rasera | UDI | 17 644 | 23,61 % |
| 2$^{[d]}$ | Hugo Gutiérrez Gálvez | PCCh | 28 217 | 30,31 % |
| 2$^{[d]}$ | Marta Isasi Barbieri | Ind-UDI | 28 884 | 31,02 % |
| 3$^{[d]}$ | Felipe Ward Edwards | UDI | 24 618 | 37,36 % |
| 3$^{[d]}$ | Marcos Espinoza Monardes | PRSD | 16 223 | 24,62 % |
| 4$^{[d]}$ | Pedro Araya Guerrero | PRI | 27 268 | 24,60 % |
| 4$^{[d]}$ | Manuel Rojas Molina | UDI | 37 241 | 33,59 % |
| 5$^{[d]}$ | Lautaro Carmona Soto | PCCh | 17 022 | 27,87 % |
| 5$^{[d]}$ | Carlos Vilches Guzmán | UDI | 13 159 | 21,55 % |
| 6$^{[d]}$ | Giovanni Calderón Bassi | UDI | 8 330 | 19,26 % |
| 6$^{[d]}$ | Alberto Robles Pantoja | PRSD | 11 582 | 26,77 % |
| 7$^{[d]}$ | Marcelo Díaz Díaz | PS | 32 673 | 36,74 % |
| 7$^{[d]}$ | Mario Bertolino Rendic | RN | 18 037 | 20,28 % |
| 8$^{[d]}$ | Matías Walker Prieto | DC | 28 948 | 27,21 % |
| 8$^{[d]}$ | Pedro Velásquez Seguel | Ind. | 25 919 | 24,37 % |
| 9$^{[d]}$ | Adriana Muñoz D'Albora | PPD | 15 332 | 25,29 % |
| 9$^{[d]}$ | Luis Lemus Aracena | PRI | 15 735 | 25,95 % |
| 10$^{[d]}$ | Eduardo Cerda García | DC | 30 017 | 21,94 % |
| 10$^{[d]}$ | Andrea Molina Oliva | Ind-UDI | 36 000 | 26,31 % |
| 11$^{[d]}$ | Gaspar Rivas Sánchez | RN | 21 634 | 20,22 % |
| 11$^{[d]}$ | Marco Antonio Núñez Lozano | PPD | 49 801 | 46,55 % |
| 12$^{[d]}$ | Arturo Squella Ovalle | UDI | 30 108 | 24,75 % |
| 12$^{[d]}$ | Marcelo Schilling Rodríguez | PS | 24 124 | 19,83 % |
| 13$^{[d]}$ | Aldo Cornejo Gonález | DC | 40 582 | 31,04 % |
| 13$^{[d]}$ | Joaquín Godoy Ibáñez | RN | 38 183 | 29,20 % |
| 14$^{[d]}$ | Rodrigo González Torres | PPD | 41 168 | 25,89 % |
| 14$^{[d]}$ | Edmundo Eluchans Urenda | UDI | 45 829 | 28,82 % |
| 15$^{[d]}$ | Víctor Torres Jeldes | DC | 18 102 | 21,11 % |
| 15$^{[d]}$ | María José Hoffmann Opazo | UDI | 20 585 | 24,00 % |
| 16$^{[d]}$ | Gabriel Silber Romo | DC | 48 333 | 29,39 % |
| 16$^{[d]}$ | Patricio Melero Abaroa | UDI | 58 306 | 35,45 % |
| 17$^{[d]}$ | Karla Rubilar Barahona | RN | 46 572 | 33,15 % |
| 17$^{[d]}$ | María Antonieta Saa Díaz | PPD | 45 798 | 32,60 % |
| 18$^{[d]}$ | Cristina Girardi Lavín | PPD | 51 669 | 34,35 % |
| 18$^{[d]}$ | Nicolás Monckeberg Díaz | RN | 40 782 | 27,11 % |
| 19$^{[d]}$ | Patricio Hales Dib | PPD | 39 126 | 38,12 % |
| 19$^{[d]}$ | Claudia Nogueira Fernández | UDI | 38 297 | 37,31 % |
| 20$^{[d]}$ | Pepe Auth Stewart | PPD | 49 981 | 20,70 % |
| 20$^{[d]}$ | Mónica Zalaquett Said | UDI | 56 168 | 23,26 % |
| 21$^{[d]}$ | Jorge Burgos Varela | DC | 52 982 | 29,79 % |
| 21$^{[d]}$ | Marcela Sabat Fernández | RN | 48 732 | 27,40 % |
| 22$^{[d]}$ | Felipe Harboe Bascuñán | PPD | 42 060 | 38,66 % |
| 22$^{[d]}$ | Alberto Cardemil Herrera | RN | 38 949 | 35,80 % |
| 23$^{[d]}$ | Ernesto Silva Méndez | UDI | 60 272 | 27,95 % |
| 23$^{[d]}$ | Cristián Monckeberg Bruner | RN | 77 484 | 35,93 % |
| 24$^{[d]}$ | Enrique Accorsi Opazo | PPD | 31 383 | 23,19 % |
| 24$^{[d]}$ | María Angélica Cristi Marfil | UDI | 44 969 | 33,24 % |
| 25$^{[d]}$ | Ximena Vidal Lázaro | PPD | 43 794 | 30,81 % |
| 25$^{[d]}$ | Felipe Salaberry Soto | UDI | 28 444 | 20,01 % |
| 26$^{[d]}$ | Carlos Montes Cisternas | PS | 71 173 | 50,44 % |
| 26$^{[d]}$ | Gustavo Hasbún Selume | UDI | 36 438 | 25,82 % |
| 27$^{[d]}$ | Tucapel Jiménez Fuentes | PPD | 47 765 | 31,89 % |
| 27$^{[d]}$ | Iván Moreira Barros | UDI | 53 683 | 35,84 % |
| 28$^{[d]}$ | Guillermo Teillier del Valle | PCCh | 49 040 | 33,52 % |
| 28$^{[d]}$ | Pedro Browne Urrejola | RN | 31 882 | 21,79 % |
| 29$^{[d]}$ | Osvaldo Andrade Lara | PS | 55 152 | 29,88 % |
| 29$^{[d]}$ | Leopoldo Pérez Lahsen | RN | 45 464 | 24,63 % |
| 30$^{[d]}$ | Ramón Farías Ponce | PPD | 29 335 | 19,27 % |
| 30$^{[d]}$ | José Antonio Kast Rist | UDI | 53 423 | 35,10 % |
| District | Deputy | Party | Votes | % |
| 31$^{[d]}$ | Denise Pascal Allende | PS | 52 763 | 32,23 % |
| 31$^{[d]}$ | Gonzalo Uriarte Herrera | UDI | 60 833 | 37,16 % |
| 32$^{[d]}$ | Juan Luis Castro González | PS | 27 772 | 30,76 % |
| 32$^{[d]}$ | Alejandro García-Huidobro | UDI | 31 346 | 34,71 % |
| 33$^{[d]}$ | Ricardo Rincón González | DC | 38 057 | 32,45 % |
| 33$^{[d]}$ | Eugenio Bauer Jouanne | UDI | 26 504 | 22,60 % |
| 34$^{[d]}$ | Alejandra Sepúlveda Orbenes | PRI | 42 771 | 45,55 % |
| 34$^{[d]}$ | Javier Macaya Danús | UDI | 17 130 | 18,24 % |
| 35$^{[d]}$ | Juan Carlos Latorre Carmona | DC | 30 300 | 38,83 % |
| 35$^{[d]}$ | Ramón Barros Montero | UDI | 29 622 | 37,96 % |
| 36$^{[d]}$ | Roberto León Ramírez | DC | 51 476 | 42,93 % |
| 36$^{[d]}$ | Celso Morales Muñoz | UDI | 35 732 | 29,80 % |
| 37$^{[d]}$ | Sergio Aguiló Melo | PS | 31 649 | 37,69 % |
| 37$^{[d]}$ | Germán Verdugo Soto | RN | 32 864 | 39,14 % |
| 38$^{[d]}$ | Pablo Lorenzini Basso | DC | 29 320 | 38,32 % |
| 38$^{[d]}$ | Pedro Pablo Álvarez-Salamanca Ramírez | Ind-UDI | 15 844 | 20,71 % |
| 39$^{[d]}$ | Jorge Tarud Daccarett | PPD | 38 626 | 46,26 % |
| 39$^{[d]}$ | Romilio Gutiérrez Pino | UDI | 22 487 | 26,93 % |
| 40$^{[d]}$ | Guillermo Ceroni Fuentes | PPD | 32 643 | 44,75 % |
| 40$^{[d]}$ | Ignacio Urrutia Bonilla | UDI | 19 323 | 26,49 % |
| 41$^{[d]}$ | Carlos Abel Jarpa Wevar | PRSD | 24 093 | 19,12 % |
| 41$^{[d]}$ | Rosauro Martínez Labbé | RN | 42 385 | 33,64 % |
| 42$^{[d]}$ | Jorge Sabag Villalobos | DC | 32 174 | 28,59 % |
| 42$^{[d]}$ | Frank Sauerbaum Muñoz | RN | 22 861 | 20,33 % |
| 43$^{[d]}$ | Cristián Campos Jara | PPD | 33 622 | 31,35 % |
| 43$^{[d]}$ | Jorge Ulloa Aguillón | UDI | 30 309 | 28,26 % |
| 44$^{[d]}$ | José Miguel Ortiz Novoa | DC | 45 379 | 27,04 % |
| 44$^{[d]}$ | Enrique van Rysselberghe Herrera | UDI | 44 735 | 26,65 % |
| 45$^{[d]}$ | Clemira Pacheco Rivas | PS | 38 379 | 33,80 % |
| 45$^{[d]}$ | Sergio Bobadilla Muñoz | UDI | 29 272 | 25,78 % |
| 46$^{[d]}$ | Iván Norambuena Farías | UDI | 34 852 | 35,77 % |
| 46$^{[d]}$ | Manuel Monsalve Benavides | PS | 30 360 | 31,16 % |
| 47$^{[d]}$ | José Pérez Arriagada | PRSD | 46 606 | 33,80 % |
| 47$^{[d]}$ | Juan Lobos Krause | UDI | 51 937 | 37,67 % |
| 48$^{[d]}$ | Mario Venegas Cárdenas | DC | 20 102 | 29,80 % |
| 48$^{[d]}$ | Gonzalo Arenas Hodar | UDI | 17 223 | 25,54 % |
| 49$^{[d]}$ | Fuad Chahín Valenzuela | DC | 20 212 | 30,26 % |
| 49$^{[d]}$ | Enrique Estay Peñaloza | UDI | 16 009 | 23,97 % |
| 50$^{[d]}$ | René Saffirio Espinoza | DC | 37 017 | 30,83 % |
| 50$^{[d]}$ | Germán Becker Alvear | RN | 33 785 | 28,14 % |
| 51$^{[d]}$ | Joaquín Tuma Zedán | PPD | 16 327 | 24,36 % |
| 51$^{[d]}$ | José Manuel Edwards Silva | RN | 11 275 | 16,82 % |
| 52$^{[d]}$ | Fernando Meza Moncada | PRSD | 22 116 | 32,72 % |
| 52$^{[d]}$ | René Manuel García García | RN | 20 726 | 30,66 % |
| 53$^{[d]}$ | Alfonso de Urresti Longton | PS | 32 433 | 38,71 % |
| 53$^{[d]}$ | Roberto Delmastro Naso | RN | 25 360 | 30,27 % |
| 54$^{[d]}$ | Enrique Jaramillo Becker | PPD | 29 004 | 37,43 % |
| 54$^{[d]}$ | Gastón von Mühlenbrock Zamora | UDI | 19 978 | 25,78 % |
| 55$^{[d]}$ | Sergio Ojeda Uribe | DC | 23 623 | 30,44 % |
| 55$^{[d]}$ | Javier Hernández Hernández | UDI | 22 108 | 28,49 % |
| 56$^{[d]}$ | Fidel Espinoza Sandoval | PS | 39 245 | 51,30 % |
| 56$^{[d]}$ | Carlos Rencodo Lavanderos | UDI | 18 792 | 24,57 % |
| 57$^{[d]}$ | Patricio Vallespín López | DC | 33 782 | 38,60 % |
| 57$^{[d]}$ | Marisol Turres Figueroa | UDI | 28 552 | 32,62 % |
| 58$^{[d]}$ | Gabriel Ascencio Mansilla | DC | 17 457 | 23,10 % |
| 58$^{[d]}$ | Alejandro Santana Tirachini | RN | 27 098 | 35,86 % |
| 59$^{[d]}$ | René Alinco Bustos | PPD | 9381 | 22,90 % |
| 59$^{[d]}$ | David Sandoval Plaza | UDI | 12 902 | 31,50 % |
| 60$^{[d]}$ | Carolina Goic Boroevic | DC | 22 498 | 34,00 % |
| 60$^{[d]}$ | Miodrag Marinovic Solo De Zaldívar | Ind. | 17 512 | 26,47 % |

### Senate

| Party or alliance | Party or alliance | Party or alliance | Party or alliance | Votes | % | Seats | Seats | Seats | Seats |
| Party or alliance | Party or alliance | Party or alliance | Party or alliance | Votes | % | Won | Not up | Total | +/– |
| | Coalition for Change | | National Renewal | 382,728 | 20.19 | 6 | 2 | 8 | 0 |
| | Coalition for Change | | Independent Democratic Union | 403,741 | 21.30 | 3 | 5 | 8 | –1 |
| | Coalition for Change | | Independents | 70,124 | 3.70 | 0 | 0 | 0 | 0 |
| | Coalition for Change | Total | Total | 856,593 | 45.19 | 9 | 7 | 16 | –1 |
| | Concertación & Juntos Podemos | | Christian Democratic Party | 314,145 | 16.57 | 4 | 5 | 9 | +3 |
| | Concertación & Juntos Podemos | | Party for Democracy | 262,503 | 13.85 | 3 | 1 | 4 | +1 |
| | Concertación & Juntos Podemos | | Socialist Party | 175,017 | 9.23 | 2 | 3 | 5 | –3 |
| | Concertación & Juntos Podemos | | Social Democrat Radical Party | 68,482 | 3.61 | 0 | 1 | 1 | –2 |
| | Concertación & Juntos Podemos | Total | Total | 820,147 | 43.27 | 9 | 10 | 19 | –1 |
| | Clean Chile, Vote Happy | | Independent Regionalist Party | 46,730 | 2.47 | 0 | 0 | 0 | –1 |
| | Clean Chile, Vote Happy | | MAS Region | | | – | 1 | 1 | 0 |
| | Clean Chile, Vote Happy | | Independents | 75,311 | 3.97 | 0 | 0 | 0 | 0 |
| | Clean Chile, Vote Happy | Total | Total | 122,041 | 6.44 | 0 | 1 | 1 | –1 |
| | New Majority for Chile | | Humanist Party | 12,974 | 0.68 | 0 | 0 | 0 | 0 |
| | New Majority for Chile | | Independents | 79,266 | 4.18 | 0 | 0 | 0 | 0 |
| | New Majority for Chile | Total | Total | 92,240 | 4.87 | 0 | 0 | 0 | 0 |
| | Independents | Independents | Independents | 4,461 | 0.24 | 0 | 2 | 2 | +1 |
| Total | Total | Total | Total | 1,895,482 | 100.00 | 18 | 20 | 38 | 0 |
| Valid votes | Valid votes | Valid votes | Valid votes | 1,895,482 | 92.31 | | | | |
| Invalid/blank votes | Invalid/blank votes | Invalid/blank votes | Invalid/blank votes | 157,998 | 7.69 | | | | |
| Total votes | Total votes | Total votes | Total votes | 2,053,480 | 100.00 | | | | |
| Registered voters/turnout | Registered voters/turnout | Registered voters/turnout | Registered voters/turnout | 2,392,477 | 85.83 | | | | |
| Source: SERVEL, IPU, Election Resources ||||||||||

#### Tarapacá-Arica and Parinacota

| Pact | Party | Candidate | Votes | % | Result |
| Coalition for Change | UDI | Jaime Orpis | 56,390 | 33.5 | Hold his seat |
| Clean Chile, Vote Happy | Independent | Salvador Urrutia | 47,087 | 29.3 | |
| Concertación | Socialist | Fulvio Rossi | 45,639 | 26.8 | New senator |
| Coalition for Change | National Renewal | Julio Lagos | 12,348 | 7.3 | |
| Concertación | PDC | Daniel Espinoza | 6,919 | 4.1 | |

#### Atacama

| Pact | Party | Candidate | Votes | % | Result |
| Coalition for Change | National Renewal | Baldo Prokurica | 34,793 | 33.0 | Hold his seat |
| Concertación | Socialist | Isabel Allende Bussi | 28,240 | 26.8 | New senator |
| Concertación | For Democracy | Antonio Leal | 19,693 | 18.7 | |
| Clean Chile, Vote Happy | Regionalist | Jaime Mulet Martínez | 18,580 | 17.6 | |
| Clean Chile, Vote Happy | Regionalist | Robinson Peña | 2,126 | 2.0 | |
| Coalition for Change | UDI | Cristián Letelier | 1,909 | 1.8 | |

#### Valparaiso East

| Pact | Party | Candidate | Votes | % | Result |
| Concertación | PDC | Ignacio Walker | 76,716 | 21.1 | New senator |
| Concertación | Social Democrat Radical | Nelson Ávila | 64,124 | 17.6 | Lost his seat |
| Coalition for Change | UDI | Marcelo Forni | 71,645 | 19.7 | |
| Coalition for Change | National Renewal | Lily Pérez | 83,595 | 23.0 | New senator |
| New Majority for Chile | Independent | Carlos Ominami | 60,945 | 16.7 | |
| New Majority for Chile | Independent | Cristián García-Huidobro | 2,509 | 0.7 | |
| Clean Chile, Vote Happy | Independent | Lautaro Velásquez | 4,422 | 1.2 | |

#### Valparaíso West

| Pact | Party | Candidate | Votes | % | Result |
| Concertación | For Democracy | Ricardo Lagos Weber | 123,626 | 33.2 | New senator |
| Coalition for Change | National Renewal | Francisco Chahuán | 105,123 | 28.2 | New senator |
| Coalition for Change | UDI | Joaquín Lavín | 103,762 | 27.9 | |
| Concertación | PDC | Hernán Pinto | 22,447 | 6.00 | |
| New Majority for Chile | Independent | Juan Guzmán | 14,784 | 4.0 | |
| Clean Chile, Vote Happy | Regionalist | Raúl Silva | 2,773 | 0.7 | |

#### Maule North

| Pact | Party | Candidate | Votes | % | Result |
| Coalition for Change | UDI | Juan Antonio Coloma | 96,844 | 35.2 | Hold his seat |
| Concertación | PDC | Andrés Zaldívar | 86,266 | 31.3 | Holding in a new seat |
| Concertación | Socialist | Jaime Gazmuri | 67,586 | 24.6 | Lost his seat |
| Coalition for Change | National Renewal | Robert Morrison | 17,548 | 6.3 | |
| New Majority for Chile | Humanist | Mercedes Bravo | 6,942 | 2.5 | |

#### Maule South

| Pact | Party | Candidate | Votes | % | Result |
| Coalition for Change | UDI | Hernán Larraín | 67,461 | 43.1 | Hold his seat |
| Concertación | PDC | Ximena Rincón | 48,607 | 31.0 | New senator |
| Concertación | Socialist | Jaime Naranjo | 32,867 | 21.0 | Lost his seat |
| Coalition for Change | Independent | Juan Ariztía | 6,110 | 3.9 | |
| New Majority for Chile | Humanist | Marilén Cabrera | 1,567 | 1.0 | |

#### Araucanía North

| Pact | Pact | Party | Candidate | Votes | % | Result |
| | Coalition for Change | National Renewal | Alberto Espina | 52,082 | 38.5 | Hold his seat |
| | Concertación | For Democracy | Jaime Quintana | 40,120 | 29.7 | New senator |
| | Concertación | PDC | Tomás Jocelyn-Holt | 7,481 | 5.5 | |
| | Coalition for Change | Independent | Cecilia Villouta | 7,255 | 5.4 | |
| | New Majority for Chile | Humanist | Juan Enrique Prieto | 1,611 | 1.2 | |
| | Clean Chile, Vote Happy | Independent | Roberto Muñoz | 20,126 | 14.9 | |
| | Clean Chile, Vote Happy | Independent | Enrique Sanhueza | 6,574 | 4.9 | |
| Source ||||||

#### Araucanía South

| Pact | Pact | Party | Candidate | Votes | % | Result |
| | Concertación | For Democracy | Eugenio Tuma Zedan | 74,207 | 29.1 | New senator |
| | Coalition for Change | National Renewal | José García Ruminot | 57,260 | 22.4 | Hold his seat |
| | Coalition for Change | UDI | Ena von Baer | 56,578 | 22.2 | |
| | Concertación | PDC | Francisco Huenchumilla | 51,338 | 20.1 | |
| | Clean Chile, Vote Happy | Regionalist | Eduardo Díaz | 11,464 | 4.5 | |
| | New Majority for Chile | Humanist | Luis Fernando Vivanco | 2,779 | 1.1 | |
| | Clean Chile, Vote Happy | Independent | José Villagrán | 1,512 | 0.6 | |
| Source ||||||

#### Aysen

| Pact | Pact | Party | Candidate | Votes | % | Result |
| | Coalition for Change | National Renewal | Antonio Horvath | 14,193 | 34.6 | Hold his seat |
| | Concertación | PDC | Patricio Walker | 11,293 | 27.5 | New senator |
| | Clean Chile, Vote Happy | Regionalist | Eduardo Cruces | 6,958 | 17.0 | |
| | Clean Chile, Vote Happy | Regionalist | Paz Foitzich | 4,613 | 11.2 | |
| | Concertación | Social Democrat Radical | Ernesto Velasco | 3,940 | 9.6 | |
| Source ||||||

## Timeline

* 13 September 2009: deadline to enroll to vote in the upcoming elections.
* 14 September 2009: deadline to register candidacies at the Electoral Service (Servel).
* 14 September 2009: electoral campaign begins.
* 5 October 2009: draw supervised by Servel to assign a ballot number to each candidate.
* 13 November 2009: electoral advertisement period starts.
* 10 December 2009: electoral advertisement period ends.
* 13 December 2009: election day. Electoral campaigning ends.
* 13 December 2009: first preliminary results are announced by the Deputy Interior Minister at 6:30 p.m. local time (9:30 p.m. UTC), including 4,342 out of 34,348 ballot boxes (12.64%).
* 13 December 2009: second preliminary results are announced by the Deputy Interior Minister at 8:03 p.m. local time (11:03 p.m. UTC), including 20,595 ballot boxes (59.96%).
* 13 December 2009: third preliminary results are announced by the Deputy Interior Minister at 10:56 p.m. local time (1:56 a.m. UTC), including 33,756 ballot boxes (98.28%).
* 14 December 2009: fourth and final preliminary results are announced by the Deputy Interior Minister at 11:05 a.m. local time (2:05 p.m. UTC), including 34,133 ballot boxes (99.37%).
* 21 December 2009: the Electoral Service (Servel) publishes preliminary results based on the examination of election certificates (actas de escrutinio) by the Tellers' Colleges (Colegios Escrutadores) meeting on 14 December 2009, including 34,263 out of 34,348 ballot boxes (99.75%).
* 29 December 2009: the Tricel publishes the final results of the first round election on the Official Gazette.
* 3 January 2009: electoral advertisement period for runoff election starts.
* 7 January 2009: ballot number is assigned to each candidate according to their position in the first draw.
* 14 January 2009: electoral advertisement period ends.
* 17 January 2010: date of presidential run-off. Electoral campaigning ends.
* 17 January 2010: first preliminary results are announced by the Deputy Interior Ministry at 6:00 p.m. local time (9:00 p.m. UTC), including results from 20,711 out of 34,348 ballot boxes (60.30%).
* 17 January 2010: Eduardo Frei concedes the election to Sebastián Piñera at 6:44 p.m. local time (9:44 p.m. UTC).
* 17 January 2010: second preliminary results are announced by the Deputy Interior Ministry at 7:40 p.m. local time (10:40 p.m. UTC), including results from 34,056 ballot boxes (99.15%).
* 18 January 2010: third and final preliminary results are announced by the Deputy Interior Ministry at 11:00 a.m. local time (2:00 p.m. UTC), including results from 34,252 ballot boxes (99.72%).
* 29 January 2010: the Election Qualifying Court (Tricel) officially proclaims PIñera as President-elect.
* 30 January 2010: the Tricel publishes the Act of Proclamation on the Official Gazette.
* 3 February 2010: the Tricel publishes the final results of the runoff election on its website.