Halpenny is a surname. Notable people with the surname include:
- Baron Barrymore Halpenny, Commercial Artist, book Editor, writer and historian of traditions and culture
- Bruce Barrymore Halpenny, widely respected English military historian and author
- Colum Halpenny, professional rugby league footballer
- Ellen Halpenny (born 1990), New Zealand netball player in the ANZ Championship
- Francess Halpenny, CC, FRSC (born 1919), Canadian editor and professor
- Ernest Halpenny, PC (1903–1974), Canadian politician
- Marion Rose Halpenny, equestrian writer and horsewoman
- William Halpenny (1882–1960), Canadian track and field athlete