1972 Czechoslovak federal election (WFAC)

Federal elections were held in Czechoslovakia in 1972. All 300 seats in the Chamber of Deputies and all 150 seats in the Chamber of Nations were up for election, with MPs elected by party-list proportional representation and all Senators elected by first-past-the-post voting.

Electoral system
The 300 members of the Chamber of Deputies were elected from 25 multi-member constituencies (each usually electing between five and 25 members) using open list proportional representation, in which they could give preferential votes for up to four candidates on their chosen list. Seats were allocated using the d'Hondt method, with an electoral threshold at 4% threshold for single parties and 8% threshold for coalitions (requirements waived for national minorities). The members of the Chamber of Nations were elected using first-past-the-post voting in 150 single-member districts; 75 in each republic. To be included on a ballot, a senate candidate had to present 2,000 signatures of support from their constituents. Should a party have 151 or more deputies in the Chamber of Deputies, it has an absolute majority and can thus govern autonomously, without the need for support from other parties. The constitution can be amended with a super majority of two-thirds, or 301 members of the Federal Assembly.

The Czechoslovak constitution states that elections to the Federal Assembly must be held every four years. Polling days in Czechoslovakia are Friday and Saturday, and voters could submit their ballots on either day. The exact date of the election was to be chosen by the President, who is obliged to call it at least 60 days prior to the expiration of the electoral term and ending on the day of its expiration. If the Chamber of Deputies were dissolved, elections should be held within 60 days of its dissolution.

Parties
The parties that had been elected to the Federal Assembly in the previous elections and still were represented had the right to participate in the federal elections - that is, they were automatically eligible for the election.

New parties wishing to participate in the election should send their application to the Minister of the Interior by 12:00 p.m. fifteen days before the election. Together with the application papers, the party had to submit a number of signatures corresponding at least to 1/300th of all valid votes cast at the last federal elections. In that election, 8,077,796 valid votes were cast, and a new party should therefore collect at least 26,925 signatures to become eligible for the election.

Chamber of Nations
'''Summary of the 1972 Chamber of Nations election results ! colspan="8" align="center" | !style="text-align:left" rowspan="2" colspan="2" width=395px | Parties !style="text-align:center" colspan="2" | Votes !style="text-align:center" colspan="2" | Seats !style="text-align:center" | Votes !style="text-align:center" | % !style="text-align:center" | Total !style="text-align:center" | ± !colspan="8" align="center"| Czechia ! 75 !colspan="8" align="center"| 🇸🇰 Slovakia ! 75 !colspan="8" align="center"| ! 150
 * - style="background-color:#E9E9E9"
 * - style="background-color:#E9E9E9"
 * - style="background-color:#AAAAAA"
 * style="background-color:#F0001C" width="1px"|
 * style="text-align:left" | Czechoslovak Social Democratic Party (ČSSD)
 * style="background-color:#008542" width="1px"|
 * style="text-align:left" | Republican Party (RS)
 * style="background-color:#ffe03e"|
 * style="text-align:left" | Czechoslovak People's Party (ČSL)
 * style="background-color:#F4C2C2"|
 * style="text-align:left" | Czechoslovak National Social Party (ČSNS)
 * style="background-color:#BF0202"|
 * style="text-align:left" | Communist Party of Czechoslovakia (KSČ)
 * style="background-color:#003399"|
 * style="text-align:left"| Liberal Democratic Party (LDS)
 * style="background-color:black"|
 * style="text-align:left"| Sudeten German People's Party (SDVP)
 * style="background-color:red"|
 * style="text-align:left"| Left Socialist Party (SSL)
 * style="background-color:#1A809A"|
 * style="text-align:left"| Freedom Party (SSV)
 * colspan="2" style="text-align:left"| Independents
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Total in the Czech Federative Republic
 * 100.00%
 * style="background-color:#F4C2C2"|
 * style="text-align:left" | Czechoslovak National Social Party (ČSNS)
 * style="background-color:#BF0202"|
 * style="text-align:left" | Communist Party of Czechoslovakia (KSČ)
 * style="background-color:#003399"|
 * style="text-align:left"| Liberal Democratic Party (LDS)
 * style="background-color:black"|
 * style="text-align:left"| Sudeten German People's Party (SDVP)
 * style="background-color:red"|
 * style="text-align:left"| Left Socialist Party (SSL)
 * style="background-color:#1A809A"|
 * style="text-align:left"| Freedom Party (SSV)
 * colspan="2" style="text-align:left"| Independents
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Total in the Czech Federative Republic
 * 100.00%
 * style="background-color:black"|
 * style="text-align:left"| Sudeten German People's Party (SDVP)
 * style="background-color:red"|
 * style="text-align:left"| Left Socialist Party (SSL)
 * style="background-color:#1A809A"|
 * style="text-align:left"| Freedom Party (SSV)
 * colspan="2" style="text-align:left"| Independents
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Total in the Czech Federative Republic
 * 100.00%
 * style="background-color:red"|
 * style="text-align:left"| Left Socialist Party (SSL)
 * style="background-color:#1A809A"|
 * style="text-align:left"| Freedom Party (SSV)
 * colspan="2" style="text-align:left"| Independents
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Total in the Czech Federative Republic
 * 100.00%
 * style="background-color:#1A809A"|
 * style="text-align:left"| Freedom Party (SSV)
 * colspan="2" style="text-align:left"| Independents
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Total in the Czech Federative Republic
 * 100.00%
 * colspan="2" style="text-align:left"| Independents
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Total in the Czech Federative Republic
 * 100.00%
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Total in the Czech Federative Republic
 * 100.00%
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Total in the Czech Federative Republic
 * 100.00%
 * style="text-align:left" colspan="2" width=395px | Total in the Czech Federative Republic
 * 100.00%
 * 100.00%
 * style="background-color:#E9E9E9;"|
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Valid votes
 * style="background-color:#E9E9E9;" colspan="2" rowspan="5"|
 * style="text-align:left" colspan="2" width=395px | Blank or invalid votes
 * style="text-align:left" colspan="2" width=395px | Votes cast / turnout
 * style="text-align:left" colspan="2" width=395px | Abstentions
 * style="text-align:left" colspan="2" width=395px | Registered voters
 * style="background-color:#E9E9E9;"|
 * - style="background-color:#AAAAAA"
 * style="text-align:left" colspan="2" width=395px | Votes cast / turnout
 * style="text-align:left" colspan="2" width=395px | Abstentions
 * style="text-align:left" colspan="2" width=395px | Registered voters
 * style="background-color:#E9E9E9;"|
 * - style="background-color:#AAAAAA"
 * style="text-align:left" colspan="2" width=395px | Abstentions
 * style="text-align:left" colspan="2" width=395px | Registered voters
 * style="background-color:#E9E9E9;"|
 * - style="background-color:#AAAAAA"
 * style="text-align:left" colspan="2" width=395px | Registered voters
 * style="background-color:#E9E9E9;"|
 * - style="background-color:#AAAAAA"
 * style="background-color:#E9E9E9;"|
 * - style="background-color:#AAAAAA"
 * - style="background-color:#AAAAAA"
 * - style="background-color:#AAAAAA"
 * style="background-color:#008542"|
 * style="text-align:left" | Republican Party (RS)
 * style="background-color:#F0001C"|
 * style="text-align:left" | Czechoslovak Social Democratic Party (ČSSD)
 * style="background-color:#5566CC"|
 * style="text-align:left" | Slovak People's Party (SĽS)
 * style="background-color:#BF0202"|
 * style="text-align:left" | Communist Party of Czechoslovakia (KSČ)
 * style="background-color:#F4C2C2"|
 * style="text-align:left" | Czechoslovak National Social Party (ČSNS)
 * style="background-color:#003399"|
 * style="text-align:left"| Liberal Democratic Party (LDS)
 * style="background-color:green"|
 * style="text-align:left"| Party of the Hungarian Community (SMK-MKP)
 * style="background-color:#253A79"|
 * style="text-align:left"| Slovak National Party (SNS)
 * style="background-color:red"|
 * style="text-align:left"| Left Socialist Party (SSL)
 * style="background-color:#1A809A"|
 * style="text-align:left"| Freedom Party (SSV)
 * colspan="2" style="text-align:left"| Independents
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Total in the Slovak Federative Republic
 * 100.00%
 * style="background-color:#F4C2C2"|
 * style="text-align:left" | Czechoslovak National Social Party (ČSNS)
 * style="background-color:#003399"|
 * style="text-align:left"| Liberal Democratic Party (LDS)
 * style="background-color:green"|
 * style="text-align:left"| Party of the Hungarian Community (SMK-MKP)
 * style="background-color:#253A79"|
 * style="text-align:left"| Slovak National Party (SNS)
 * style="background-color:red"|
 * style="text-align:left"| Left Socialist Party (SSL)
 * style="background-color:#1A809A"|
 * style="text-align:left"| Freedom Party (SSV)
 * colspan="2" style="text-align:left"| Independents
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Total in the Slovak Federative Republic
 * 100.00%
 * style="background-color:green"|
 * style="text-align:left"| Party of the Hungarian Community (SMK-MKP)
 * style="background-color:#253A79"|
 * style="text-align:left"| Slovak National Party (SNS)
 * style="background-color:red"|
 * style="text-align:left"| Left Socialist Party (SSL)
 * style="background-color:#1A809A"|
 * style="text-align:left"| Freedom Party (SSV)
 * colspan="2" style="text-align:left"| Independents
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Total in the Slovak Federative Republic
 * 100.00%
 * style="background-color:red"|
 * style="text-align:left"| Left Socialist Party (SSL)
 * style="background-color:#1A809A"|
 * style="text-align:left"| Freedom Party (SSV)
 * colspan="2" style="text-align:left"| Independents
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Total in the Slovak Federative Republic
 * 100.00%
 * style="background-color:#1A809A"|
 * style="text-align:left"| Freedom Party (SSV)
 * colspan="2" style="text-align:left"| Independents
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Total in the Slovak Federative Republic
 * 100.00%
 * colspan="2" style="text-align:left"| Independents
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Total in the Slovak Federative Republic
 * 100.00%
 * colspan="2" style="text-align:left"| Independents
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Total in the Slovak Federative Republic
 * 100.00%
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Total in the Slovak Federative Republic
 * 100.00%
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Total in the Slovak Federative Republic
 * 100.00%
 * 100.00%
 * 100.00%
 * style="background-color:#E9E9E9;"|
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Valid votes
 * style="background-color:#E9E9E9;" colspan="2" rowspan="5"|
 * style="text-align:left" colspan="2" width=395px | Blank or invalid votes
 * style="text-align:left" colspan="2" width=395px | Votes cast / turnout
 * style="text-align:left" colspan="2" width=395px | Abstentions
 * style="text-align:left" colspan="2" width=395px | Registered voters
 * style="background-color:#E9E9E9;"|
 * - style="background-color:#AAAAAA"
 * style="text-align:left" colspan="2" width=395px | Votes cast / turnout
 * style="text-align:left" colspan="2" width=395px | Abstentions
 * style="text-align:left" colspan="2" width=395px | Registered voters
 * style="background-color:#E9E9E9;"|
 * - style="background-color:#AAAAAA"
 * style="text-align:left" colspan="2" width=395px | Abstentions
 * style="text-align:left" colspan="2" width=395px | Registered voters
 * style="background-color:#E9E9E9;"|
 * - style="background-color:#AAAAAA"
 * style="text-align:left" colspan="2" width=395px | Registered voters
 * style="background-color:#E9E9E9;"|
 * - style="background-color:#AAAAAA"
 * style="background-color:#E9E9E9;"|
 * - style="background-color:#AAAAAA"
 * - style="background-color:#AAAAAA"
 * - style="background-color:#AAAAAA"
 * style="text-align:left" colspan="2" width=395px | Total
 * 100.00%
 * 100.00%
 * 100.00%
 * style="background-color:#E9E9E9;"|
 * style="background-color:#E9E9E9" colspan="9"|
 * style="text-align:left" colspan="2" width=395px | Valid votes
 * style="background-color:#E9E9E9;" colspan="2" rowspan="5"|
 * style="text-align:left" colspan="2" width=395px | Blank or invalid votes
 * style="text-align:left" colspan="2" width=395px | Votes cast / turnout
 * style="text-align:left" colspan="2" width=395px | Abstentions
 * style="text-align:left" colspan="2" width=395px | Registered voters
 * style="background-color:#E9E9E9;"|
 * }
 * style="text-align:left" colspan="2" width=395px | Votes cast / turnout
 * style="text-align:left" colspan="2" width=395px | Abstentions
 * style="text-align:left" colspan="2" width=395px | Registered voters
 * style="background-color:#E9E9E9;"|
 * }
 * style="text-align:left" colspan="2" width=395px | Abstentions
 * style="text-align:left" colspan="2" width=395px | Registered voters
 * style="background-color:#E9E9E9;"|
 * }
 * style="text-align:left" colspan="2" width=395px | Registered voters
 * style="background-color:#E9E9E9;"|
 * }
 * style="background-color:#E9E9E9;"|
 * }
 * }