Nancy Ames (born 1937 as Nancy Hamilton Alfaro) is an American folk singer and songwriter. She regularly appeared on the American version of the television series That Was the Week That Was. The TW3 Girl, as she was known, sang the show theme and special material.

She was born in Washington, DC. She is the granddaughter of Ricardo Joaquín Alfaro (1882–1971), who served as President of Panama from 1931 to 1932.