Unna I

143 Unna I
Electoral district for the Bundestag
Unna I in 2025
State	North Rhine-Westphalia
Population	252,900 (2019)
Electorate	194,493 (2021)
Major settlements	Unna Bergkamen Schwerte
Area	347.3 km2
Current electoral district
Created	1965
Party	SPD
Member	Oliver Kaczmarek
Elected	2009, 2013, 2017, 2021, 2025

Unna I 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 143. It is located in the Ruhr region of North Rhine-Westphalia, comprising the southern part of the district of Unna. ^[1]

Unna I was created for the 1965 federal election. Since 2009, it has been represented by Oliver Kaczmarek of the Social Democratic Party (SPD). ^[2]

Geography

Unna I is located in the Ruhr region of North Rhine-Westphalia. As of the 2021 federal election, it comprises the municipalities of Bergkamen, Bönen, Fröndenberg, Holzwickede, Kamen, Schwerte, and Unna from the Unna district. ^[1]

History

Unna I was created in 1965, then known as Unna. It acquired its current name in the 1980 election. In the 1965 through 1976 elections, it was constituency 123 in the numbering system. From 1980 through 1998, it was number 116. From 2002 through 2009, it was number 145. In the 2013 through 2021 elections, it was number 144. From the 2025 election, it has been number 143.

Originally, the constituency was coterminous with the Unna district. It acquired its current borders in the 1980 election.

Election	No.	Name	Borders
1965	123	Unna	Unna district
1969
1972
1976
1980	116	Unna I	Unna district (only Bergkamen, Bönen, Fröndenberg, Holzwickede, Kamen, Schwerte, and Unna municipalities)
1983
1987
1990
1994
1998
2002	145
2005
2009
2013	144
2017
2021
2025	143

Members

The constituency has been held continuously by the Social Democratic Party (SPD) since its creation. It was first represented by Manfred Schulte from 1965 to 1987. Ulrich Böhme was representative from 1987 to 1998, followed by Rolf Stöckel until 2009. Oliver Kaczmarek was elected in 2009, and re-elected in 2013, 2017, 2021 and 2025.

Election		Member	Party	%
	1965	Manfred Schulte	SPD	54.0
	1969			57.4
	1972			64.1
	1976			59.5
	1980			59.1
	1983			55.0
	1987	Ulrich Böhme	SPD	55.4
	1990			52.9
	1994			55.5
	1998	Rolf Stöckel	SPD	59.3
	2002			56.4
	2005			54.8
	2009	Oliver Kaczmarek	SPD	42.6
	2013			46.7
	2017			38.8
	2021			40.8
	2025			31.8

Election results

2025 election

Federal election (2025): Unna I [3]
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.
Party		Candidate		Votes	%	±%	Party votes	%	±%
	SPD	Y Oliver Kaczmarek		49,685	31.8	9.0	38,636	24.7	11.7
	CDU	Tilman Rademacher		46,506	29.8	4.7	42,844	27.4	5.6
	AfD	Friederike Hagelstein		29,075	18.6	10.6	29,411	18.8	11.0
	Greens	Michael Sacher		14,058	9.0	4.9	16,275	10.4	3.2
	Left	Oliver Schröder		9,491	6.1	2.9	11,269	7.2	3.7
	BSW						6,254	4.0
	FDP	Benjamin Lehmkühler		3,973	2.5	3.7	5,436	3.5	6.9
	Tierschutzpartei						2,489	1.6	0.2
	Volt	Christina Emler		1,948	1,2		948	0.6	0.4
	BD	Sebastian Rühling		535	0.4		534	0.4	0.2
	PARTEI						923	0.6	0.6
	FW					1.3	716	0.5	0.3
	dieBasis					1.0	289	0.2	0.6
	Team Todenhöfer						245	0.2	0.4
	PdF						229	0.1	0.1
	Values						73	0.0
	Pirates						534	0.4	0.2
	MLPD					0.1	54	0.0	0.0
	MERA25						45	0.0
	Gesundheitsforschung								0.1
	Humanists								0.1
	Bündnis C								0.1
	ÖDP							0.0	0.0
	SGP								0.0
Informal votes				1,412			976
Total valid votes				156,059			156,495
Turnout				157,471	82.7	6.5
	SPD hold		Majority	3,179	2.0	11.0

2021 election

Federal election (2021): Unna I [4]
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.
Party		Candidate		Votes	%	±%	Party votes	%	±%
	SPD	Y Oliver Kaczmarek		59,869	40.8	2.0	53,490	36.4	2.8
	CDU	Hubert Hüppe		36,810	25.1	6.7	31,995	21.8	5.4
	Greens	Michael Sacher [a]		20,340	13.9	7.4	20,022	13.6	6.8
	AfD	Ulrich Lehmann		11,736	8.0	1.1	11,428	7.8	2.0
	FDP	Suat Gülden		9,137	6.2	0.2	15,286	10.4	1.1
	Left	Andreas Meier		4,731	3.2	2.2	5,154	3.5	3.4
	Tierschutzpartei						2,562	1.7	0.8
	PARTEI						1,740	1.2	0.4
	FW	Thomas Cieszynski		1,967	1.3	0.7	1,088	0.7	0.4
	dieBasis	Artur Helios		1,451	1.0		1,151	0.8
	Team Todenhöfer						823	0.6
	Independent	Nadine Peiler		535	0.4
	Pirates						534	0.4	0.2
	Volt						331	0.2
	LIEBE						211	0.1
	Gesundheitsforschung						193	0.1	0.0
	LfK						175	0.1
	NPD						144	0.1	0.2
	Humanists						107	0.1	0.0
	V-Partei3						102	0.1	0.0
	Bündnis C						89	0.1
	du.						76	0.1
	ÖDP						72	0.0	0.0
	MLPD	Tobias Thylmann		185	0.1	0.0	64	0.0	0.0
	PdF						45	0.0
	DKP						24	0.0	0.0
	LKR						19	0.0
	SGP						11	0.0	0.0
Informal votes				1,322			1,147
Total valid votes				146,761			146,936
Turnout				148,083	76.1	0.1
	SPD hold		Majority	23,059	15.7	8.7

2017 election

Federal election (2017): Unna I [5]
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.
Party		Candidate		Votes	%	±%	Party votes	%	±%
	SPD	Y Oliver Kaczmarek		58,019	38.8	7.8	50,205	33.6	7.4
	CDU	Hubert Hüppe		47,452	31.8	4.1	40,697	27.2	4.7
	AfD	Andreas Handt		13,558	9.1		14,689	9.8	6.1
	FDP	Heike Schaumann		9,635	6.4	4.7	17,196	11.5	7.5
	Greens	Michael Sacher		9,600	6.4	0.8	10,254	6.9	1.0
	Left	Ruth Tietz		8,048	5.4	0.1	10,313	6.9	0.7
	Tierschutzpartei						1,376	0.9
	PARTEI						1,146	0.8	0.4
	Pirates	Marcel Stephan Clostermann		1,565	1.0	1.4	804	0.5	1.6
	AD-DEMOKRATEN						717	0.5
	FW	Thomas Cieszynski		941	0.6	0.3	561	0.4	0.2
	NPD						463	0.3	0.7
	Independent	Jürgen Mollik		406	0.3
	Gesundheitsforschung						166	0.1
	Volksabstimmung						165	0.1	0.1
	V-Partei³						148	0.1
	DM						143	0.1
	DiB						122	0.1
	ÖDP						115	0.1	0.0
	BGE						97	0.1
	MLPD	Tobias Michael Karl Thylmann		161	0.1		88	0.1	0.0
	Die Humanisten						76	0.1
	SGP						20	0.0	0.0
	DKP						19	0.0
Informal votes				1,446			1,251
Total valid votes				149,385			149,580
Turnout				150,831	76.2	2.2
	SPD hold		Majority	10,567	7.0	3.9

2013 election

Federal election (2013): Unna I [6]
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.
Party		Candidate		Votes	%	±%	Party votes	%	±%
	SPD	Y Oliver Kaczmarek		68,287	46.7	4.1	60,019	40.9	3.3
	CDU	Hubert Hüppe		52,433	35.8	3.4	46,794	31.9	5.7
	Greens	Malte Spitz		8,242	5.6	3.0	11,567	7.9	1.4
	Left	Walter Wendt-Kleinberg		7,749	5.3	3.2	9,127	6.2	3.2
	AfD						5,525	3.8
	Pirates	Marcel Clostermann		3,535	2.4		3,189	2.2	0.5
	FDP	Heike Schaumann		2,514	1.7	4.7	5,850	4.0	8.1
	NPD			2,174	1.5	0.0	1,505	1.0	0.1
	FW			1,342	0.9		882	0.6
	PARTEI						557	0.4
	PRO						362	0.2
	Volksabstimmung						309	0.2	0.1
	BIG						172	0.1
	Nichtwahler						141	0.1
	REP						139	0.1	0.1
	ÖDP						125	0.1	0.0
	Party of Reason						114	0.1
	RRP						83	0.1	0.1
	MLPD						55	0.0	0.0
	BüSo						40	0.0	0.0
	PSG						31	0.0	0.0
	Die Rechte						29	0.0
Informal votes				1,843			1,504
Total valid votes				146,276			146,615
Turnout				148,119	74.0	0.7
	SPD hold		Majority	15,854	10.9	0.7

2009 election

Federal election (2009): Unna I [7]
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.
Party		Candidate		Votes	%	±%	Party votes	%	±%
	SPD	Oliver Kaczmarek		62,638	42.6	12.2	55,439	37.6	12.7
	CDU	Hubert Hüppe		47,702	32.4	0.8	38,646	26.2	0.4
	Greens	Friedrich Ostendorff		12,737	8.7	3.7	13,756	9.3	2.2
	Left	Walter Wendt-Kleinberg		12,451	8.5	4.1	13,842	9.4	4.0
	FDP	Gero Heinrich Bangerter		9,418	6.4	3.3	17,773	12.1	4.3
	Pirates						2,439	1.7
	NPD	Holger Steinbiß		2,206	1.5	0.3	1,665	1.1	0.2
	Tierschutzpartei						1,045	0.7	0.2
	RENTNER						958	0.7
	FAMILIE						727	0.5	0.1
	REP						307	0.2	0.1
	DVU						207	0.1
	RRP						183	0.1
	Volksabstimmung						144	0.1	0.0
	ÖDP						88	0.1
	Centre						52	0.0	0.0
	MLPD						44	0.0	0.0
	BüSo						24	0.0	0.0
	PSG						18	0.0	0.1
Informal votes				1,757			1,552
Total valid votes				147,152			147,357
Turnout				148,909	73.4	6.8
	SPD hold		Majority	14,936	10.2	13.0

Notes

1. Sacher entered the Bundestag on the Greens list after the resignation of Oliver Krischer in June 2022.

References

1. "Constituency Unna I". Federal Returning Officer.
2. "Results for Unna I". Federal Returning Officer.
3. Results for Unna I
4. Results for Unna I
5. Results for Unna I
6. Results for Unna I
7. Results for Unna I