Bresnahan is a surname. Notable people with the surname include:
Chuck Bresnahan (born 1960), American football coach Patrick Francis Bresnahan (1872–1940), U.S. Navy sailor Roger Bresnahan (1879–1944), American baseball player Tom Bresnahan (born 1935), American football player Timothy Bresnahan (born 1953), American economist
See also Mount Bresnahan, a mountain of Antarctica