Peter Lefcourt (born 1946) is an American television producer, a film and television screenwriter, and a novelist.

Lefcourt's early career involved writing teleplays for primetime series such as Cagney and Lacey, Scarecrow and Mrs. King (both of which he also produced), Eight is Enough, and Remington Steele, among others. He penned the scripts for the television movies Monte Carlo, Cracked Up, Danielle Steel's Fine Things, and The Women of Windsor. In more recent years he executive-produced and wrote for Beggars and Choosers and Karen Sisco.

Lefcourt was nominated for a 1984 Emmy Award for Outstanding Drama Series for Cagney and Lacey and won the following year.

Much of Lefcourt's fiction has been inspired by his true-life experiences working behind-the-scenes in Hollywood. His first novel, The Deal, was adapted for the screen by William H. Macy and debuted at the 2008 Sundance Film Festival. Several others of his books are under option or in various stages of development for feature films.

His other novels are The Dreyfus Affair (1992), Di & I (1994), Abbreviating Ernie (1997), The Woody (1998), Eleven Karens (2003), The Manhattan Beach Project (2005), Le Jet Lag (2007), An American Family (2010) and Purgatory Gardens (2015).

Lefcourt lives with his wife Terri in Santa Monica, California.

In a 2012 interview with Larry Mantle on KPCC's Airtalk, Lefcourt stated he signed with Amazon.com to publish and distribute his most recent book "with some trepidation". He said friends told him he was 'joining the enemy', but his backlist is selling better electronically on Amazon.com than in it did at traditional booksellers while in print.