2015 Dallas Cowboys season

The 2015 season was the Dallas Cowboys' 56th in the National Football League (NFL), their seventh playing home games at AT&T Stadium and their fifth full season under head coach Jason Garrett. They finished the regular season with a 4–12 record, which was their first losing season since 2010, their worst since 1989, when they went 1–15, and the first time (and, as of the 2025 season, only time) the Cowboys finished in last place in the NFC East since 2002.

Despite starting 2–0, they would struggle immensely. Key injuries, including starting quarterback Tony Romo were factors in their struggles of the season. They were eliminated from playoff contention with their Week 15 loss to the New York Jets. This would be the last losing season for the Cowboys until 2020.