Patricia "Peppermint Patty" Reichardt is a fictional character featured in Charles M. Schulz's comic strip Peanuts. A freckle-faced auburn/brunette, she is one of a small group in the strip who lives across town from Charlie Brown and his school friends. She generally displays the characteristics of a tomboy, although that was slightly changed when Marcie was paired with her in There's No Time for Love, Charlie Brown in 1973. She made her first appearance on August 22, 1966. The following year, she made her animated debut in the TV special You're in Love, Charlie Brown and began (in the comics) coaching a baseball team that played against Charlie Brown and since has had other adventures with him. She calls Charlie Brown "Chuck" and Lucy "Lucille" and is the only character to do so (although Peppermint Patty's close friend Marcie has been known to call Charlie Brown "Chuck" on occasion, she usually calls him "Charles").

Peppermint Patty's birthday is on October 4, as determined from the October 4, 1970, strip in which Patty's father (who always calls her his "little gem") gives her roses on her birthday.