Carnahan may refer to:
People the Carnahan family from Missouri, including Mel Carnahan (1934–2000), American lawyer and politician Herschel L. Carnahan (1879–1941), American politician James Carnahan (1775–1859), American clergyman and educator Jean Carnahan (1933–2024), American politician and writer Jennifer Carnahan (born 1976), American politician Joe Carnahan (born 1969), American film director, screenwriter, and producer J. P. Carnahan (1832–1912), American mathematician and politician Matthew Carnahan (born 1961), American producer, writer, and director Matthew Michael Carnahan, American screenwriter Norman F. Carnahan (born 1942), American chemical engineer Robert H. Carnahan (1823–1913), American military officer Scott Carnahan (born 1953), American professional tennis player Suzanne Carnahan, birth name of Susan Peters (1921–1952), American actress Alex Carnahan (a.k.a. Lex), character from the TV series Containment Evelyn Carnahan, character from The Mummy film series
Places Carnahan Courthouse, Missouri Carnahan High School of the Future, Missouri Carnahan House, Louisiana Carnahan House (Pine Bluff, Arkansas) Carnahan Run, Pennsylvania