The fourth season of the television series Ally McBeal commenced airing in the United States on October 12, 2000, concluded on May 21, 2001, and consisted of 23 episodes. The entire season originally aired Mondays at 9pm, just like the seasons before. The fourth season had an average rating of 12.0 million viewers in the United States and was ranked #40 on the complete ranking sheet of all the year's shows. This was the third highest rated season of Ally McBeal.