1964 Illinois House of Representatives election
The U.S. state of Illinois held an election on November 3, 1964, for all 177 members of the state's House of Representatives for the 74th Illinois General Assembly, alongside other state and federal elections. Due to the state's failure to redistrict, all of the seats were elected at-large by plurality block voting, with voters choosing up to 177 candidates to support.
Source: Wikipedia — 1964 Illinois House of Representatives election (CC BY-SA 4.0)