The San Francisco 49ers were founded in 1946 as a charter member of the All- America Football Conference (AAFC).

Quick Scoop

  • The 49ers were officially formed on June 4, 1946, joining the new AAFC rather than the NFL at first.
  • Their first season of play was the 1946 campaign, making them one of the older franchises in modern professional football.
  • The team later entered the NFL in 1949 when the AAFC merged into the league, cementing their place in top-tier professional football.

TL;DR: When were the 49ers founded? They were founded in 1946, with their franchise officially organized in early June of that year before debuting in the 1946 season.

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