Niccolò "Nico" Mannion (born March 14, 2001) is an Italian-American professional basketball player for Olimpia Milano of the Lega Basket Serie A and the EuroLeague.

(born 24 September 1995) a professional footballer who plays as a centre-back for Manchester United in the Women's Super League and the Republic of Ireland women's national team.

Wesley Gene Mannion (born September 1970) is an Australian television personality, best known from the series The Crocodile Hunter as Steve Irwin's best friend and the former director of Australia Zoo.

Jonna Danielle Mannion (born November 10, 1988) is an American reality TV personality, best known for her appearances on the MTV reality television series The Real World: Cancun, and the Real World spinoff show The Challenge.

Pace Shewan Mannion (born September 22, 1960) is an American former professional basketball player who played in the National Basketball Association and in the Italian league with the team of Cantù (which won the FIBA Korać Cup in 1991 defeating Real Madrid in the final when he scored 35 points).

(born 25 May 1993) an Irish Gaelic footballer who plays for the Kilmacud Crokes club and, since 2013, at senior level for the Dublin county team.

Wilfrid James Mannion (16 May 1918 – 14 April 2000) was an English professional footballer who played as an inside forward, making over 350 senior appearances for Middlesbrough.