1963 San Francisco 49ers season

The 1963 San Francisco 49ers season was the franchise's 14th season in the National Football League and their 18th overall.

The 49ers attempted to improve on their 6–8 record from the previous season and make it to the playoffs for the first time in 5 seasons. However, the team lost all of their preseason games and lost their first 3 games of the season under incumbent coach Red Hickey, who resigned after the loss to the Minnesota Vikings in Week 3. Under interim (and later incumbent) head coach Jack Christiansen, the team won only 2 of their last 10 games, and finished with a 2–12 record, missing the playoffs for the 6th straight year.

This was the last season in which the colors were red and silver. The following season, after switching back and forth twice in their history, the team permanently switched to red and gold. It was also the last season the white uniforms did not match the red uniforms; after this season the shoulder stripes on the white uniforms were replaced with the three red stripes on the sleeve, similar to the three white stripes on the red uniforms.