List of NFL longest losing streaks

This article contains two lists:
 * The longest losing streaks in the regular season in NFL history
 * The longest losing streaks in the postseason in NFL history

The Chicago Cardinals have the longest regular season losing streak, losing 29 consecutive games from 1942 through 1945. The Tampa Bay Buccaneers have the longest losing streak since the 1970 AFL–NFL merger, losing the first 26 games in franchise history in 1976 and 1977. The Detroit Lions hold the record for the longest postseason losing streak, dropping nine consecutive playoff games between 1991 and 2016.