Shaun Mannagh (born 6 August 1997) is a professional Australian rules footballer who plays for the Geelong Cats in the Australian Football League (AFL).

Originally from Walla Walla in the Hume Football League, Mannagh represented the NSW / ACT Under 16 Rams at the National Championships in 2013, while playing with Walla Walla and winning their 2013 seniors best and fairest.

Mannagh then played with the Murray Bushrangers in 2014 and 2015 in the TAC Cup and also played with North Albury in the Ovens & Murray Football Netball League from 2014 to 2018. Mannagh also represented the Ovens & Murray Football Netball League in the senior interleague side in 2016 too.

Mannagh was then recruited to Richmond's VFL reserves team where he played with them from 2017 to 2019. While remaining on Richmond's VFL list, Mannagh returned to the Ovens & Murray League, this time playing for Lavington in 2019 and was best on ground in their 2019 premiership with five goals, winning the Did Simpson Medal.

Mannagh spent the summer of 2020/2021 playing in the Northern Territory Football League with the Wanderers Football Club, who lost the preliminary final to St Mary's Football Club (NTFL).

Mannagh then played for Werribee in the VFL from 2021 to 2023, where he was runner up in the club's 2021 and 2023 best and fairest and finished 3rd in Werribee's best and fairest award in 2022.

He then kicked six goals from 28 disposals in a losing Grand Final against the Gold Coast Suns in 2023, awarded the Norm Goss Memorial Medal as best afield.

After a few years of attracting the attention of AFL clubs, his Grand Final performances were enough to enter the national draft as a mature-aged rookie. Mannagh had a medical with Fremantle, an interview with Port Adelaide, and even mid-season draft conversations with Western Bulldogs before finally being chosen by Geelong in the second round of that year's national draft.