Mexican legislative election, 1991

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Legislative elections were held in Mexico on 18 August 1991. The Institutional Revolutionary Party won 320 of the 500 seats in the Chamber of Deputies and 61 of the 64 seats in the Senate. Voter turnout was 61% in the Chamber election and 62% in the Senate election.

Results

Senate

Party	Votes	%	Seats	+/-
Institutional Revolutionary Party	14,256,447	61.5	61	+1
National Action Party	4,100,287	17.7	1	+1
Party of the Cardenist Front of National Reconstruction	1,202,425	5.2	0	0
Party of the Democratic Revolution	878,115	3.8	2	New
Authentic Party of the Mexican Revolution	487,258	2.1	0	0
Ecologist Green Party of Mexico	326,251	1.4	0	New
Mexican Democratic Party	276,661	1.2	0	0
Labor Party	258,510	1.1	0	0
Revolutionary Workers' Party	156,918	0.7	0	0
Popular Socialist Party	97,780	0.4	0	0
Non-registered candidates	14,284	0.1	0	0
Invalid/blank votes	1,138,260	–	–	–
Total	24,302,640	100	64	0
Source: Nohlen

Chamber of Deputies

Party	Mayoria		Partido		Seats	+/-
	Votes	%	Votes	%
Institutional Revolutionary Party	14,051,349	61.4	14,145,234	61.4	320	+60
National Action Party	4,024,316	17.7	4,068,712	17.7	89	-12
Party of the Democratic Revolution	1,900,750	8.3	1,913,174	8.3	41	New
Party of the Cardenist Front of National Reconstruction	990,440	4.3	998,158	4.3	23	-15
Authentic Party of the Mexican Revolution	489,732	2.1	492,514	2.1	15	-15
Popular Socialist Party	411,848	1.8	414,780	1.8	12	-25
Ecologist Green Party of Mexico	329,714	1.4	332,603	1.4	0	New
Labor Party	258,595	1.1	260,266	1.1	0	New
Mexican Democratic Party	248,431	1.1	249,915	1.1	0	0
Revolutionary Workers' Party	135,360	0.6	136,341	0.6	0	0
Non-registered candidates	13,897	0.1	13,911	0.1	0	New
Invalid/blank votes	1,160,050	–	1,168,631	–	–	–
Total	24,032,482	100	24,194,239	100	500	0
Source: Nohlen