Boag is a surname. Notable people with the surname include:
- Carly Boag (born 1991), Australian basketball player
- Colin Boag, British Army officer
- Erin Boag (born 1975), New Zealand ballroom dancer
- G. T. Boag (1884–1969), British civil servant
- James Boag I (c. 1804–1890), Australian brewery founder and proprietor
- James Boag II (1854–1919), Australian brewery proprietor
- John Boag (disambiguation), various people
- Keith Boag, Canadian television journalist
- Michelle Boag (born 1954), New Zealand public relations practitioner
- Peter Boag, Canadian scientist
- Stuart Boag (disambiguation), various people
- Tommy Boag (1814–1977), Australian rules footballer
- Wally Boag (1920–2011), American stage performer
- Yvonne Boag (born 1954), Scottish-born Australian artist
See also
- Boag's Brewery, an Australian brewery