Westheimer may refer to:
A surname: David Westheimer (1917–2005), American novelist Frank Henry Westheimer (1912–2007), American chemist Gerald Westheimer (born 1924), Australian vision scientist and neuroscientist Irvin Ferdinand Westheimer (1879–1980), American founder of the Big Brothers Big Sisters of America Joel Westheimer, American professor at the University of Ottawa, son of Ruth Westheimer Julius Westheimer (1916–2005), American financial advisor Ruth Westheimer (born Karola Siegel, 1928; known as "Dr. Ruth"), German-American sex therapist, talk show host, author, professor, Holocaust survivor, and former Haganah sniper.
A festival: Westheimer Street Festival Westheimer Colony Art Festival
An airport: Westheimer Air Park in Fort Bend County, Texas, United States University of Oklahoma Westheimer Airport in Cleveland County, Oklahoma, United States
A road: Westheimer Road, in Houston, Texas, United States
An office complex: 5251 Westheimer