Coolahan is an English surname. Notable people with the surname include:
Bill Coolahan (fl. 1927–1943), Australian soccer player Craig Coolahan (born 1970), Canadian politician Jack Coolahan (1914–1988), Australian rules footballer James Aloysius Coolahan (1903–1986), United States district judge for the District of New Jersey Kate Coolahan (1929–2025), Australian-born New Zealand commercial artist, fashion illustrator, and printmaker
See also