# Steinburg – Dithmarschen Süd

Steinburg – Dithmarschen Süd (English: Steinburg – Dithmarschen South) is an electoral constituency (German: Wahlkreis) represented in the Bundestag. It elects one member via first-past-the-post voting. Under the current constituency numbering system, it is designated as constituency 3. It is located in central western Schleswig-Holstein, comprising the Steinburg district, the southern part of the Dithmarschen district, and part of the Segeberg district.
Steinburg – Dithmarschen Süd was created for the 1965 federal election. Since 2017, it has been represented by Mark Helfrich of the Christian Democratic Union (CDU).

## Geography

Steinburg – Dithmarschen Süd is located in central western Schleswig-Holstein. As of the 2021 federal election, it comprises the district of Steinburg, the southern part of the Dithmarschen district (specifically the urban municipality of Brunsbüttel, and the Ämter of Burg-Sankt Michaelisdonn, Marne-Nordsee, and Mitteldithmarschen), and the urban district of Bad Bramstedt and Amt of Bad Bramstedt-Land from the Segeberg district.

## History

Steinburg – Dithmarschen Süd was created in 1965, then known as Steinburg – Süderdithmarschen. It contained parts of the abolished constituencies of Steinburg and Norder- und Süderdithmarschen. Until 1972, it was constituency 4 in the numbering system. From 1972 until 2002, its name contained a hyphen between "Dithmarschen" and "Süd".
In the elections of 1965 and 1969, Steinburg – Süderdithmarschen consisted of the districts of Steinburg and Süderdithmarschen. After reform of the administrative divisions in Schleswig-Holstein, the constituency acquired its current name and configuration, containing Steinburg and the southern part of Dithmarschen. In 2002, Bad Bramstedt and Bad Bramstedt-Land became part of Steinburg – Dithmarschen Süd.
| Election | No. | Name | Borders |
| 1965 | 4 | Steinburg – Süderdithmarschen | Steinburg district Süderdithmarschen district |
| 1969 | 4 | Steinburg – Süderdithmarschen | Steinburg district Süderdithmarschen district |
| 1972 | 3 | Steinburg – Dithmarschen-Süd | Steinburg district Dithmarschen district (only Brunsbüttel municipality, Burg-Sankt Michaelisdonn Amt, Marne-Nordsee Amt, and Mitteldithmarschen Amt) |
| 1976 | 3 | Steinburg – Dithmarschen-Süd | Steinburg district Dithmarschen district (only Brunsbüttel municipality, Burg-Sankt Michaelisdonn Amt, Marne-Nordsee Amt, and Mitteldithmarschen Amt) |
| 1980 | 3 | Steinburg – Dithmarschen-Süd | Steinburg district Dithmarschen district (only Brunsbüttel municipality, Burg-Sankt Michaelisdonn Amt, Marne-Nordsee Amt, and Mitteldithmarschen Amt) |
| 1983 | 3 | Steinburg – Dithmarschen-Süd | Steinburg district Dithmarschen district (only Brunsbüttel municipality, Burg-Sankt Michaelisdonn Amt, Marne-Nordsee Amt, and Mitteldithmarschen Amt) |
| 1987 | 3 | Steinburg – Dithmarschen-Süd | Steinburg district Dithmarschen district (only Brunsbüttel municipality, Burg-Sankt Michaelisdonn Amt, Marne-Nordsee Amt, and Mitteldithmarschen Amt) |
| 1990 | 3 | Steinburg – Dithmarschen-Süd | Steinburg district Dithmarschen district (only Brunsbüttel municipality, Burg-Sankt Michaelisdonn Amt, Marne-Nordsee Amt, and Mitteldithmarschen Amt) |
| 1994 | 3 | Steinburg – Dithmarschen-Süd | Steinburg district Dithmarschen district (only Brunsbüttel municipality, Burg-Sankt Michaelisdonn Amt, Marne-Nordsee Amt, and Mitteldithmarschen Amt) |
| 1998 | 3 | Steinburg – Dithmarschen-Süd | Steinburg district Dithmarschen district (only Brunsbüttel municipality, Burg-Sankt Michaelisdonn Amt, Marne-Nordsee Amt, and Mitteldithmarschen Amt) |
| 2002 | 3 | Steinburg – Dithmarschen Süd | Steinburg district Dithmarschen district (only Brunsbüttel municipality, Burg-Sankt Michaelisdonn Amt, Marne-Nordsee Amt, and Mitteldithmarschen Amt) Segeberg district (only Bad Bramstedt municipality Bad Bramstedt-Land Amt) |
| 2005 | 3 | Steinburg – Dithmarschen Süd | Steinburg district Dithmarschen district (only Brunsbüttel municipality, Burg-Sankt Michaelisdonn Amt, Marne-Nordsee Amt, and Mitteldithmarschen Amt) Segeberg district (only Bad Bramstedt municipality Bad Bramstedt-Land Amt) |
| 2009 | 3 | Steinburg – Dithmarschen Süd | Steinburg district Dithmarschen district (only Brunsbüttel municipality, Burg-Sankt Michaelisdonn Amt, Marne-Nordsee Amt, and Mitteldithmarschen Amt) Segeberg district (only Bad Bramstedt municipality Bad Bramstedt-Land Amt) |
| 2013 | 3 | Steinburg – Dithmarschen Süd | Steinburg district Dithmarschen district (only Brunsbüttel municipality, Burg-Sankt Michaelisdonn Amt, Marne-Nordsee Amt, and Mitteldithmarschen Amt) Segeberg district (only Bad Bramstedt municipality Bad Bramstedt-Land Amt) |
| 2017 | 3 | Steinburg – Dithmarschen Süd | Steinburg district Dithmarschen district (only Brunsbüttel municipality, Burg-Sankt Michaelisdonn Amt, Marne-Nordsee Amt, and Mitteldithmarschen Amt) Segeberg district (only Bad Bramstedt municipality Bad Bramstedt-Land Amt) |
| 2021 | 3 | Steinburg – Dithmarschen Süd | Steinburg district Dithmarschen district (only Brunsbüttel municipality, Burg-Sankt Michaelisdonn Amt, Marne-Nordsee Amt, and Mitteldithmarschen Amt) Segeberg district (only Bad Bramstedt municipality Bad Bramstedt-Land Amt) |
| 2025 | 3 | Steinburg – Dithmarschen Süd | Steinburg district Dithmarschen district (only Brunsbüttel municipality, Burg-Sankt Michaelisdonn Amt, Marne-Nordsee Amt, and Mitteldithmarschen Amt) Segeberg district (only Bad Bramstedt municipality Bad Bramstedt-Land Amt) |

## Members

The constituency has been held by the Christian Democratic Union (CDU) during all but three Bundestag terms since its creation in 1965. Its first representative was the CDU's Kai-Uwe von Hassel, who served from 1965 until 1980, when the constituency was won by the Social Democratic Party (SPD). It was then represented by Kurt Leuschner for a single term, before returning to the CDU in 1983. Between then and 1998, it was represented by Dietrich Austermann. The constituency was won by the SPD's Cornelie Sonntag-Wolgast in 1998. She was re-elected in 2002, but the constituency again returned to the CDU in 2002. It was then represented by Rolf Koschorrek until 2013. He was succeeded by Mark Helfrich, who was re-elected in 2017 and 2021.
| Election | Member | Party | % |
| 1965 | Kai-Uwe von Hassel | CDU | 52.2 |
| 1969 | Kai-Uwe von Hassel | CDU | 50.8 |
| 1972 | Kai-Uwe von Hassel | CDU | 48.9 |
| 1976 | Kai-Uwe von Hassel | CDU | 48.4 |
| 1980 | Kurt Leuschner | SPD | 48.1 |
| 1983 | Dietrich Austermann | CDU | 51.4 |
| 1987 | Dietrich Austermann | CDU | 47.4 |
| 1990 | Dietrich Austermann | CDU | 48.3 |
| 1994 | Dietrich Austermann | CDU | 47.4 |
| 1998 | Cornelie Sonntag-Wolgast | SPD | 48.8 |
| 2002 | Cornelie Sonntag-Wolgast | SPD | 45.8 |
| 2005 | Rolf Koschorrek | CDU | 44.9 |
| 2009 | Rolf Koschorrek | CDU | 39.8 |
| 2013 | Mark Helfrich | CDU | 45.4 |
| 2017 | Mark Helfrich | CDU | 41.9 |
| 2021 | Mark Helfrich | CDU | 29.2 |

## Election results
### 2025 election

Federal election (2025): Steinburg – Dithmarschen Süd :
| Notes: | Notes: | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. |
| Party | Party | Candidate | Candidate | Votes | % | ±% | Party votes | % | ±% |
| | CDU | Y Mark Helfrich | Y Mark Helfrich | 50,928 | 35.0 | 5.8 | 42,612 | 29.2 | 4.9 |
| | AfD | Ralf Kirbach | Ralf Kirbach | 29,693 | 20.4 | 12.7 | 29,679 | 20.4 | 12.0 |
| | SPD | Hauke Thießen | Hauke Thießen | 30,733 | 21.1 | 8.0 | 25,645 | 17.6 | 10.1 |
| | Greens | Fabian Faller | Fabian Faller | 14,468 | 9.9 | 2.4 | 16,079 | 11.0 | 3.2 |
| | Left | Tobias Braunsdorf | Tobias Braunsdorf | 8,709 | 6.0 | 2.8 | 9,684 | 6.6 | 3.3 |
| | FDP | Michael Wamser | Michael Wamser | 5,647 | 3.9 | 10.4 | 7,447 | 5.1 | 8.6 |
| | BSW | | | | | | 5,355 | 3.7 | New |
| | SSW | | | | | | 4,991 | 3.4 | 0.9 |
| | FW | Jens Köster | Jens Köster | 3,120 | 2.1 | 0.2 | 1,552 | 1.1 | 0.2 |
| | Volt | Marco Schulz | Marco Schulz | 2,137 | 1.5 | New | 1,233 | 0.8 | 0.7 |
| | PARTEI | | | | | | 1,213 | 0.8 | 0.2 |
| | BD | | | | | | 236 | 0.2 | New |
| | MLPD | | | | | | 45 | <0.1 | 0.0 |
| Informal votes | Informal votes | Informal votes | Informal votes | 1,141 | | | 805 | | |
| Total valid votes | Total valid votes | Total valid votes | Total valid votes | 145,435 | | | 145,771 | | |
| Turnout | Turnout | Turnout | Turnout | 146,576 | 83.4 | 6.3 | | | |
| | CDU hold | CDU hold | Majority | 20,195 | 13.9 | 13.9 | | | |

### 2021 election

Federal election (2021): Steinburg – Dithmarschen Süd :
| Notes: | Notes: | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. |
| Party | Party | Candidate | Candidate | Votes | % | ±% | Party votes | % | ±% |
| | CDU | Y Mark Helfrich | Y Mark Helfrich | 39,431 | 29.2 | 12.7 | 32,842 | 24.3 | 11.9 |
| | SPD | Karin Thissen | Karin Thissen | 39,379 | 29.2 | 3.0 | 37,468 | 27.7 | 5.0 |
| | FDP | Wolfgang Kubicki | Wolfgang Kubicki | 19,315 | 14.3 | 3.3 | 18,492 | 13.7 | 0.5 |
| | Greens | Ingrid Nestle | Ingrid Nestle | 16,686 | 12.4 | 5.6 | 19,237 | 14.2 | 4.3 |
| | AfD | Jan Voigt | Jan Voigt | 10,429 | 7.7 | 0.1 | 11,303 | 8.4 | 0.2 |
| | Left | Michael Schilke | Michael Schilke | 4,339 | 3.2 | 2.3 | 4,524 | 3.3 | 3.3 |
| | SSW | | | | | | 3,366 | 2.5 | |
| | Tierschutzpartei | | | | | | 1,719 | 1.3 | |
| | FW | Jens Köster | Jens Köster | 2,566 | 1.9 | 0.9 | 1,713 | 1.3 | 0.5 |
| | dieBasis | Stefan Habermann | Stefan Habermann | 2,040 | 1.5 | | 1,712 | 1.3 | |
| | PARTEI | | | | | | 1,346 | 1.0 | 0.1 |
| | Team Todenhöfer | | | | | | 283 | 0.2 | |
| | V-Partei3 | Robert Pilgrim | Robert Pilgrim | 581 | 0.4 | | 250 | 0.2 | |
| | Volt | | | | | | 226 | 0.2 | |
| | The Homeland | | | | | | 190 | 0.1 | 0.2 |
| | Humanists | | | | | | 118 | 0.1 | |
| | ÖDP | | | | | | 105 | 0.1 | 0.1 |
| | LKR | Mark Riemann | Mark Riemann | 214 | 0.2 | | 84 | 0.1 | |
| | du. | | | | | | 77 | 0.1 | |
| | DKP | | | | | | 29 | 0.0 | |
| | MLPD | | | | | | 25 | 0.0 | 0.0 |
| Informal votes | Informal votes | Informal votes | Informal votes | 1,319 | | | 1,190 | | |
| Total valid votes | Total valid votes | Total valid votes | Total valid votes | 134,980 | | | 135,109 | | |
| Turnout | Turnout | Turnout | Turnout | 136,299 | 77.0 | 2.3 | | | |
| | CDU hold | CDU hold | Majority | 52 | 0.0 | 15.8 | | | |

### 2017 election

Federal election (2017): Steinburg – Dithmarschen Süd :
| Notes: | Notes: | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. |
| Party | Party | Candidate | Candidate | Votes | % | ±% | Party votes | % | ±% |
| | CDU | Y Mark Helfrich | Y Mark Helfrich | 54,812 | 41.9 | 3.5 | 47,366 | 36.2 | 5.7 |
| | SPD | Karin Thissen | Karin Thissen | 34,219 | 26.1 | 7.9 | 29,756 | 22.7 | 7.3 |
| | FDP | Wolfgang Kubicki | Wolfgang Kubicki | 14,440 | 11.0 | 6.0 | 17,298 | 13.2 | 7.1 |
| | AfD | Rolf von Rhein | Rolf von Rhein | 10,006 | 7.6 | 4.1 | 11,180 | 8.5 | 4.1 |
| | Greens | Ingrid Nestle | Ingrid Nestle | 8,791 | 6.7 | 1.6 | 12,960 | 9.9 | 2.3 |
| | Left | Björn Thoroe | Björn Thoroe | 7,176 | 5.5 | 1.6 | 8,732 | 6.7 | 1.6 |
| | PARTEI | | | | | | 1,445 | 1.1 | |
| | FW | Helmut Unger | Helmut Unger | 1,278 | 1.0 | | 1,002 | 0.8 | 0.1 |
| | BGE | | | | | | 415 | 0.3 | |
| | The Homeland | | | | | | 471 | 0.4 | 0.5 |
| | ÖDP | | | | | | 191 | 0.1 | |
| | MLPD | Christian Kölle | Christian Kölle | 161 | 0.1 | | 62 | 0.0 | 0.0 |
| Informal votes | Informal votes | Informal votes | Informal votes | 1,134 | | | 1,139 | | |
| Total valid votes | Total valid votes | Total valid votes | Total valid votes | 130,883 | | | 130,878 | | |
| Turnout | Turnout | Turnout | Turnout | 132,017 | 74.7 | 3.2 | | | |
| | CDU hold | CDU hold | Majority | 20,593 | 15.8 | 4.4 | | | |

### 2013 election

Federal election (2013): Steinburg – Dithmarschen Süd :
| Notes: | Notes: | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. |
| Party | Party | Candidate | Candidate | Votes | % | ±% | Party votes | % | ±% |
| | CDU | Mark Helfrich | Mark Helfrich | 56,669 | 45.4 | 5.5 | 52,408 | 41.9 | 7.2 |
| | SPD | Karin Thissen | Karin Thissen | 42,476 | 34.0 | 4.2 | 37,502 | 30.0 | 5.0 |
| | Greens | Eka von Kalben | Eka von Kalben | 6,386 | 5.1 | 3.4 | 9,485 | 7.6 | 2.7 |
| | FDP | Wolfgang Kubicki | Wolfgang Kubicki | 6,324 | 5.1 | 7.8 | 7,689 | 6.2 | 11.4 |
| | Left | Marcel Mansouri | Marcel Mansouri | 4,909 | 3.9 | 3.2 | 6,286 | 5.0 | 2.8 |
| | AfD | Ulrike Trebesius | Ulrike Trebesius | 4,468 | 3.6 | | 5,492 | 4.4 | |
| | Pirates | Patrick Breyer | Patrick Breyer | 2,674 | 2.1 | | 2,709 | 2.2 | 0.1 |
| | The Homeland | Hans-Günther Adler | Hans-Günther Adler | 980 | 0.8 | 0.5 | 1,038 | 0.8 | 0.4 |
| | Tierschutzpartei | | | | | | 930 | 0.7 | |
| | FW | | | | | | 869 | 0.7 | |
| | Rentner | | | | | | 516 | 0.4 | 0.9 |
| | MLPD | | | | | | 34 | 0.0 | 0.0 |
| Informal votes | Informal votes | Informal votes | Informal votes | 1,523 | | | 1,451 | | |
| Total valid votes | Total valid votes | Total valid votes | Total valid votes | 124,886 | | | 124,958 | | |
| Turnout | Turnout | Turnout | Turnout | 126,409 | 71.5 | 0.7 | | | |
| | CDU hold | CDU hold | Majority | 14,193 | 11.4 | 1.4 | | | |

### 2009 election

Federal election (2009): Steinburg – Dithmarschen Süd :
| Notes: | Notes: | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. |
| Party | Party | Candidate | Candidate | Votes | % | ±% | Party votes | % | ±% |
| | CDU | Y Rolf Koschorrek | Y Rolf Koschorrek | 49,779 | 39.8 | 5.1 | 43,480 | 34.7 | 4.3 |
| | SPD | Jörn Thießen | Jörn Thießen | 37,277 | 29.8 | 11.4 | 31,282 | 25.0 | 11.3 |
| | FDP | Jürgen Koppelin | Jürgen Koppelin | 16,037 | 12.8 | 8.4 | 21,970 | 17.5 | 6.8 |
| | Greens | Bernd Voß | Bernd Voß | 10,665 | 8.5 | 5.3 | 12,899 | 10.3 | 3.7 |
| | Left | Dieter Cwielong | Dieter Cwielong | 8,896 | 7.1 | 3.5 | 9,808 | 7.8 | 3.2 |
| | Pirates | | | | | | 2,549 | 2.0 | |
| | Rentner | | | | | | 1,604 | 1.3 | |
| | The Homeland | Helmut Günter Radunski | Helmut Günter Radunski | 1,603 | 1.3 | 0.2 | 1,512 | 1.2 | 0.0 |
| | Independent | Jürgen Peter | Jürgen Peter | 715 | 0.6 | | | | |
| | DVU | | | | | | 142 | 0.1 | |
| | MLPD | | | | | | 44 | 0.0 | 0.0 |
| Informal votes | Informal votes | Informal votes | Informal votes | 3,348 | | | 3,030 | | |
| Total valid votes | Total valid votes | Total valid votes | Total valid votes | 124,972 | | | 125,290 | | |
| Turnout | Turnout | Turnout | Turnout | 128,320 | 72.3 | 6.2 | | | |
| | CDU hold | CDU hold | Majority | 12,502 | 10.0 | 6.3 | | | |

### 2005 election

Federal election (2005): Steinburg – Dithmarschen Süd :
| Notes: | Notes: | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. | Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively. |
| Party | Party | Candidate | Candidate | Votes | % | ±% | Party votes | % | ±% |
| | CDU | Rolf Koschorrek | Rolf Koschorrek | 61,471 | 44.9 | 1.9 | 53,340 | 39.0 | 0.4 |
| | SPD | | | 56,428 | 41.2 | 4.6 | 49,715 | 36.3 | 4.9 |
| | FDP | | | 6,024 | 4.4 | 1.6 | 14,701 | 10.7 | 1.9 |
| | Left | | | 4,899 | 3.6 | 2.3 | 6,288 | 4.6 | 3.3 |
| | Greens | | | 4,480 | 3.3 | 0.6 | 8,979 | 6.6 | 1.1 |
| | Familie | | | 2,143 | 1.6 | | 2,129 | 1.6 | |
| | The Homeland | | | 1,471 | 1.1 | | 1,665 | 1.2 | 0.9 |
| | MLPD | | | | | | 89 | 0.1 | |
| Informal votes | Informal votes | Informal votes | Informal votes | 2,098 | | | 2,108 | | |
| Total valid votes | Total valid votes | Total valid votes | Total valid votes | 136,916 | | | 136,906 | | |
| Turnout | Turnout | Turnout | Turnout | 139,014 | 78.5 | 1.4 | | | |
| | CDU gain from SPD | CDU gain from SPD | Majority | 5,043 | 3.7 | | | | |