204 Mainz
Electoral district for the Bundestag
Mainz in 2025
State	Rhineland-Palatinate
Population	353,600 (2019)
Electorate	249,630 (2021)
Major settlements	Mainz Ingelheim am Rhein Bingen am Rhein
Area	467.3 km2
Current electoral district
Created	1949
Party	SPD
Member	Daniel Baldy
Elected	2021

Mainz 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 204. It is located in eastern Rhineland-Palatinate, comprising the city of Mainz and the northern part of the Mainz-Bingen district.^[1]

Mainz was created for the inaugural 1949 federal election. Since 2021, it has been represented by Daniel Baldy of the Social Democratic Party (SPD).^[2]

Mainz is located in eastern Rhineland-Palatinate. As of the 2021 federal election, it comprises the independent city of Mainz as well as the municipalities of Bingen am Rhein, Budenheim, and Ingelheim am Rhein and the Verbandsgemeinden of Gau-Algesheim, Nieder-Olm, and Rhein-Nahe from the Mainz-Bingen district.^[1]

Mainz was created in 1949. In the 1949 election, it was Rhineland-Palatinate constituency 9 in the numbering system. In the 1953 through 1976 elections, it was number 156. In the 1980 through 1998 elections, it was number 154. In the 2002 election, it was number 208. In the 2005 election, it was number 207. In the 2009 and 2013 elections, it was number 206. In the 2017 and 2021 elections, it was number 205. From the 2025 election, it has been number 204.

Originally, the constituency comprised the city of Mainz and the districts of Bingen and Landkreis Mainz excluding the Amtsgerichtsbezirk of Oppenheim. In the 1972 through 2013 elections, it acquired a configuration very similar to its current borders, but including the Verbandsgemeinde of Sprendlingen-Gensingen. It acquired its current borders in the 2017 election.

The constituency was first represented by Joseph Schmitt of the Christian Democratic Union (CDU) from 1949 to 1953, followed by Josef Schlick from 1953 to 1965. Josef Hofmann then served a single term. Hugo Brandt of the Social Democratic Party (SPD) was elected in 1969 and served until 1983. Johannes Gerster of the CDU won the constituency in 1983 and was representative until 1994. Hans-Otto Wilhelm then served a single term. Eckhart Pick of the SPD was elected in 1998 and served until 2002, when he was succeeded by Michael Hartmann. Ute Granold of the CDU was representative from 2009 to 2013. Ursula Groden-Kranich was elected in 2013 and re-elected in 2017. Daniel Baldy won the constituency for the SPD in 2021.

Federal election (2021): Mainz[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	Daniel Baldy		49,878	24.9	3.1	53,889	26.8	4.8
	CDU	N Ursula Groden-Kranich		47,153	23.6	12.1	42,659	21.2	11.5
	Greens	Tabea Rößner		37,319	18.7	7.8	46,183	22.9	9.8
	Left	Gerhard Trabert		24,863	12.4	6.0	9,418	4.7	3.9
	FDP	Klaus Sartorius		14,408	7.2	0.3	23,178	11.5	0.3
	AfD	Sebastian Münzenmaier		10,360	5.2	2.1	10,833	5.4	2.8
	FW	Gerhard Wenderoth		4,751	2.4	1.3	3,605	1.8	1.0
	Tierschutzpartei						2,025	1.0
	Volt	Florian Köhler-Langes		2,133	1.1		1,741	0.9
	dieBasis	Jörg Heuser		2,093	1.0		1,979	1.0
	PARTEI	Daniela Zaun		1,841	0.9	0.6	1,600	0.8	0.4
	Team Todenhöfer						1,255	0.6
	ÖDP	Michael Ruf		1,444	0.7	0.5	1,029	0.5	0.4
	Independent	Sebastian Seiffert		1,396	0.7
	Pirates	Bodo Noeske		1,118	0.6	0.2	970	0.5	0.1
	Independent	Markus Heil		758	0.4
	Humanists	David Kaufmann		486	0.2		320	0.2
	V-Partei3						219	0.1	0.1
	DiB						171	0.1
	NPD						109	0.1	0.1
	LKR						67	0.0
	MLPD						38	0.0	0.0
Informal votes				2,669			1,382
Total valid votes				200,001			201,288
Turnout				202,670	81.2	0.2
	SPD gain from CDU		Majority	2,725	1.3

Federal election (2017): Mainz[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	%	±%
	CDU	Y Ursula Groden-Kranich		71,535	35.7	4.4	65,713	32.7	5.7
	SPD	Carsten Kühl		56,184	28.0	6.8	44,203	22.0	4.5
	Greens	Tabea Rößner		21,685	10.8	0.6	26,415	13.1	0.2
	AfD	Sebastian Münzenmaier		14,542	7.3		16,535	8.2	3.7
	FDP	David Dietz		13,813	6.9	1.9	22,608	11.3	4.7
	Left	Martin Malcherek		12,904	6.4	2.1	17,148	8.5	3.0
	PARTEI	Bernd Föhr		2,963	1.5		2,486	1.2
	ÖDP	Wilhelm Schild		2,355	1.2	0.2	1,755	0.9	0.2
	FW	Gerhard Wenderoth		2,111	1.1	0.3	1,506	0.7	0.0
	Pirates	René Pickhardt		1,504	0.8	1.9	1,195	0.6	1.9
	V-Partei³						512	0.3
	Independent	Bernhard Heck		486	0.2
	BGE						481	0.2
	NPD						260	0.1	0.4
	New Liberals	Jim Preuß		237	0.1
	MLPD						62	0.0	0.0
Informal votes				2,215			1,655
Total valid votes				200,319			200,879
Turnout				202,534	81.3	4.7
	CDU hold		Majority	15,351	7.7	2.5

Federal election (2013): Mainz[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	%	±%
	CDU	Ursula Groden-Kranich		77,285	40.1	3.8	74,392	38.4	5.7
	SPD	Michael Hartmann		67,169	34.9	4.3	51,614	26.7	3.7
	Greens	Tabea Rößner		19,339	10.0	2.6	25,339	13.1	2.7
	FDP	Rainer Brüderle		9,633	5.0	6.8	12,688	6.6	8.9
	Left	Kathrin Senger-Schäfer		8,359	4.3	1.4	10,652	5.5	1.9
	AfD						8,815	4.6
	Pirates	Britta Werner		5,164	2.7		4,799	2.5	0.1
	FW	Gerhard Wenderoth		2,609	1.4		1,422	0.7
	ÖDP	Wilhelm Schild		1,819	0.9	0.3	1,314	0.7	0.0
	NPD						1,060	0.5	0.1
	REP						561	0.3	0.9
	Party of Reason	Patrick Wybranietz		830	0.4		486	0.3
	PRO						339	0.2
	BüSo	Barbara Spahn		286	0.1	0.0
	MLPD						72	0.0	0.0
Informal votes				3,583			2,523
Total valid votes				192,493			193,553
Turnout				196,076	76.5	0.6
	CDU hold		Majority	10,116	5.2	0.5

Federal election (2009): Mainz[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	%	±%
	CDU	Ute Granold		68,081	36.3	2.9	61,777	32.8	1.2
	SPD	N Michael Hartmann		57,338	30.6	10.4	43,303	23.0	10.4
	Greens	Tabea Rößner		23,696	12.6	6.9	29,745	15.8	3.8
	FDP	Rainer Brüderle		22,054	11.8	3.1	29,045	15.4	2.5
	Left	Karl Voßkühler		10,737	5.7	2.0	13,922	7.4	2.8
	Pirates						4,553	2.4
	REP						2,265	1.2	0.0
	ÖDP	Felix Leinen		2,384	1.3		1,305	0.7
	NPD	Ingo Helge		2,043	1.1	0.1	1,153	0.6	0.2
	FAMILIE						1,035	0.5	0.3
	DIE VIOLETTEN	Erwin Schott		833	0.4
	BüSo	Christian Huth		304	0.2
	PBC						245	0.1	0.1
	DVU						96	0.1
	MLPD						34	0.0	0.0
Informal votes				3,627			2,619
Total valid votes				187,470			188,478
Turnout				191,097	75.9	5.3
	CDU gain from SPD		Majority	10,743	5.7