1934 Chicago Bears season

The 1934 season was the Chicago Bears' 15th in the National Football League and 12th season under head coach George Halas. The team was able to improve on their 10–2–1 record from 1933 and finished with an undefeated 13–0 record (the best record in the 2nd Halas era).

The season began with startling success, as the Bears reeled off nine straight wins in which they scored 20 or more points each game while allowing more than 7 points only twice. The last four wins were more difficult, including a tough win over the Giants in New York and back-to-back home-and-away close victories over the Detroit Lions in that franchise's first year in Detroit. The Bears outscored opponents 286–86, and became the first team to go unbeaten and untied in the NFL's regular season.

The Bears won the NFL Western Division title for the second straight year and met the NFL Eastern Division champion New York Giants once again in the NFL Championship game. The Bears were denied perfection as the Giants went on to win what would become known as the "Sneakers Game".