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On this day in 1848, voters ratified the Wisconsin Constitution, one of the oldest constitutions still in effect today

Source: Ballotpedia News March 12, 2026 at 11:51 AM (Mar 12, 2026) Wisconsin Senate Race

On March 13, 1848, Wisconsin voters ratified the state constitution with overwhelming support of 72.5%, establishing one of the oldest continuously used state constitutions in the United States. The successful ratification followed an earlier 1846 voter approval to form a state government and the convening of Wisconsin's first constitutional convention.

Key Points

  • Wisconsin Constitution ratified in 1848 with 72.5% voter approval
  • Remains one of the oldest constitutions still in active effect today
  • Followed the 1846 voter measure that authorized creation of state government