McGlynn is an Irish surname. Notable persons with the name include:

• Aileen McGlynn (born 1973), Scottish paralympic tandem cyclist
• Arty McGlynn (1944–2019), Irish guitarist
• Ben McGlynn (born 1985), Australian rules football player playing for the Sydney Swans
• Dick McGlynn (born 1948), retired professional ice hockey player
• Edward McGlynn (1837–1900), American Roman Catholic priest and social reformer
• Frank McGlynn, Sr. (1866–1951), American film actor
• Gareth McGlynn (born 1982), midfielder for Derry City
• Gerard McGlynn, American retired soccer midfielder
• Ian McGlynn (born 1973), American singer-songwriter
• John McGlynn (actor), Scottish actor
• John McGlynn (Gaelic footballer), Kerry player
• John McGlynn (Scottish footballer), association football player and manager (Heart of Midlothian FC)
• John H. McGlynn, American editor/translator
• Joseph Leo McGlynn, Jr. (1925–1999), United States federal judge
• Karyna McGlynn (born 1977), American poet
• Katherine A. McGlynn, American cancer epidemiologist
• Katie McGlynn (born 1993), British actress
• Mary Elizabeth McGlynn (born 1966), American voice actress, ADR director, writer, and singer
• Michael McGlynn (born 1964), Irish composer
• Michael McGlynn (swimmer) (born 2000), South African marathon swimmer
• Michael J. McGlynn, mayor of Medford, Massachusetts
• Mike McGlynn (born 1985), American football center for the Philadelphia Eagles
• Molly McGlynn, Canadian film and television director and screenwriter
• Pat McGlynn (born 1958), rhythm guitarist for the Bay City Rollers
• Ryan McGlynn (born 1974), co-owner of McGlynn Racing
• Stoney McGlynn (1872–1941), professional baseball pitcher
• Vic McGlynn (born 1978), English radio presenter and disc jockey