# List of number-one singles of 2009 (Finland)

This is the complete list of (physical and digital) number-one singles sold in Finland in 2009 according to the Official Finnish Charts. The list on the left side of the box (Suomen virallinen singlelista, "Official Finnish Singles Chart") represents both physical and digital track sales and the one on the right side (Suomen virallinen latauslista, "Official Finnish Download Chart") represents sales of digital tracks.

## Chart history

| Official Finnish Singles Chart | Official Finnish Singles Chart | Official Finnish Singles Chart | Official Finnish Singles Chart | Official Finnish Download Chart | Official Finnish Download Chart | Official Finnish Download Chart | Official Finnish Download Chart |
| Issue date | Song | Artist(s) | Ref | Issue date | Song | Artist(s) | Ref |
| Week 1 (December 30, 2008) | "Hot n Cold" | Katy Perry | | Week 1 | "Hot n Cold" | Katy Perry | |
| Week 2 (January 6, 2009) | "Poker Face" | Lady Gaga | | Week 2 | "Poker Face" | Lady Gaga | |
| Week 3 (January 13) | "Poker Face" | Lady Gaga | | Week 3 | "Poker Face" | Lady Gaga | |
| Week 4 (January 20) | "Poker Face" | Lady Gaga | | Week 4 | "Poker Face" | Lady Gaga | |
| Week 5 (January 27) | "Poker Face" | Lady Gaga | | Week 5 | "Poker Face" | Lady Gaga | |
| Week 6 (February 3) | "Poker Face" | Lady Gaga | | Week 6 | "Poker Face" | Lady Gaga | |
| Week 7 (February 10) | "Poker Face" | Lady Gaga | | Week 7 | "Poker Face" | Lady Gaga | |
| Week 8 (February 17) | "Poker Face" | Lady Gaga | | Week 8 | "Poker Face" | Lady Gaga | |
| Week 9 (February 24) | "Poker Face" | Lady Gaga | | Week 9 | "Poker Face" | Lady Gaga | |
| Week 10 (March 3) | "Serotonin" | Widescreen Mode | | Week 10 | "Serotonin" | Widescreen Mode | |
| Week 11 (March 10) | "Ravistettava ennen käyttöä" | Apulanta | | Week 11 | "Ravistettava ennen käyttöä" | Apulanta | |
| Week 12 (March 17) | "Poker Face" | Lady Gaga | | Week 12 | "Poker Face" | Lady Gaga | |
| Week 13 (March 24) | "Poker Face" | Lady Gaga | | Week 13 | "Poker Face" | Lady Gaga | |
| Week 14 (March 31) | "Lose Control" | Waldo's People | | Week 14 | "Poker Face" | Lady Gaga | |
| Week 15 (April 7) | "Lose Control" | Waldo's People | | Week 15 | "Poker Face" | Lady Gaga | |
| Week 16 (April 14) | "Poker Face" | Lady Gaga | | Week 16 | "Poker Face" | Lady Gaga | |
| Week 17 (April 21) | "Jos mä oisin sä" | Cheek | | Week 17 | "Jos mä oisin sä" | Cheek | |
| Week 18 (April 28) | "Silver Bride" | Amorphis | | Week 18 | "Jos mä oisin sä" | Cheek | |
| Week 19 (5 May) | "Nyt huudetaan – Ihanaa, Leijonat, ihanaa (10v. remix)" | Antero Mertaranta | | Week 19 | "Nyt huudetaan – Ihanaa, Leijonat, ihanaa (10v. remix)" | Antero Mertaranta | |
| Week 20 (12 May) | "Jos mä oisin sä" | Cheek | | Week 20 | "Jos mä oisin sä" | Cheek | |
| Week 21 (19 May) | "Kesävainaja" | Viikate | | Week 21 | "Fairytale" | Alexander Rybak | |
| Week 22 (26 May) | "Nälkämaan laulu (Urhousremix 09)" | DJ Urho | | Week 22 | "Fairytale" | Alexander Rybak | |
| Week 23 (June 2) | "Fairytale" | Alexander Rybak | | Week 23 | "Fairytale" | Alexander Rybak | |
| Week 24 (June 9) | "Karkuri" | Järjestyshäiriö | | Week 24 | "Karkuri" | Järjestyshäiriö | |
| Week 25 (June 16) | "C'est la vie" | Anna Puu | | Week 25 | "C'est la vie" | Anna Puu | |
| Week 26 (June 23) | "Juuret" | Antti Tuisku | | Week 26 | "Jos mä oisin sä" | Cheek | |
| Week 27 (June 30) | "Juuret" | Antti Tuisku | | Week 27 | "Poikkeus sääntöön" | Aste | |
| Week 28 (July 7) | "Suudellaan" | Lauri Tähkä & Elonkerjuu | | Week 28 | "Poikkeus sääntöön" | Aste | |
| Week 29 (July 14) | "Jai Ho! (You Are My Destiny)" | A. R. Rahman & The Pussycat Dolls (feat. Nicole Scherzinger) | | Week 29 | "Jai Ho! (You Are My Destiny)" | A. R. Rahman & The Pussycat Dolls (feat. Nicole Scherzinger) | |
| Week 30 (July 21) | "Jai Ho! (You Are My Destiny)" | A. R. Rahman & The Pussycat Dolls (feat. Nicole Scherzinger) | | Week 30 | "Jai Ho! (You Are My Destiny)" | A. R. Rahman & The Pussycat Dolls (feat. Nicole Scherzinger) | |
| Week 31 (July 28) | "Jai Ho! (You Are My Destiny)" | A. R. Rahman & The Pussycat Dolls (feat. Nicole Scherzinger) | | Week 31 | "Jai Ho! (You Are My Destiny)" | A. R. Rahman & The Pussycat Dolls (feat. Nicole Scherzinger) | |
| Week 32 (August 4) | "Jai Ho! (You Are My Destiny)" | A. R. Rahman & The Pussycat Dolls (feat. Nicole Scherzinger) | | Week 32 | "Jai Ho! (You Are My Destiny)" | A. R. Rahman & The Pussycat Dolls (feat. Nicole Scherzinger) | |
| Week 33 (August 11) | "Celebration" | Madonna | | Week 33 | "Celebration" | Madonna | |
| Week 34 (August 18) | "Celebration" | Madonna | | Week 34 | "Celebration" | Madonna | |
| Week 35 (August 25) | "Celebration" | Madonna | | Week 35 | "Celebration" | Madonna | |
| Week 36 (September 1) | "Celebration" | Madonna | | Week 36 | "Celebration" | Madonna | |
| Week 37 (September 8) | "Celebration" | Madonna | | Week 37 | "Celebration" | Madonna | |
| Week 38 (September 15) | "Kiitos ja kunnia" | Yö | | Week 38 | "Celebration" | Madonna | |
| Week 39 (September 22) | "Celebration" | Madonna | | Week 39 | "Celebration" | Madonna | |
| Week 40 (September 29) | "Pussy" | Rammstein | | Week 40 | "Pussy" | Rammstein | |
| Week 41 (October 6) | "Polte päästä paratiisiin" | Jarkko Martikainen | | Week 41 | "Polte päästä paratiisiin" | Jarkko Martikainen | |
| Week 42 (October 13) | "Frontrow Girl" | White Flame | | Week 42 | "Frontrow Girl" | White Flame | |
| Week 43 (October 20) | "Polte päästä paratiisiin" | Jarkko Martikainen | | Week 43 | "Polte päästä paratiisiin" | Jarkko Martikainen | |
| Week 44 (October 27) | "Polte päästä paratiisiin" | Jarkko Martikainen | | Week 44 | "Polte päästä paratiisiin" | Jarkko Martikainen | |
| Week 45 (November 3) | "Umbrella" | The Baseballs | | Week 45 | "Umbrella" | The Baseballs | |
| Week 46 (November 10) | "Umbrella" | The Baseballs | | Week 46 | "Umbrella" | The Baseballs | |
| Week 47 (November 17) | "Umbrella" | The Baseballs | | Week 47 | "Umbrella" | The Baseballs | |
| Week 48 (November 24) | "Umbrella" | The Baseballs | | Week 48 | "Umbrella" | The Baseballs | |
| Week 49 (December 1) | "Kuollut kävelee" | Kotiteollisuus | | Week 49 | "Umbrella" | The Baseballs | |
| Week 50 (December 8) | "Umbrella" | The Baseballs | | Week 50 | "Umbrella" | The Baseballs | |
| Week 51 (December 15) | "Umbrella" | The Baseballs | | Week 51 | "Umbrella" | The Baseballs | |
| Week 52 (December 22) | "Bad Romance" | Lady Gaga | | Week 52 | "Bad Romance" | Lady Gaga | |