Aslak Fonn Witry (born 10 March 1996) is a Norwegian footballer who plays as a defender for Norwegian club Rosenborg.
Fonn Witry started his career at Rosenborg as a junior. Fonn Witry signed with Ranheim in 2015.
Fonn Witry made his debut for Ranheim in Eliteserien in a 4–1 win against Stabæk.
On 20 December 2018, he signed for Djurgårdens IF in Allsvenskan. He got his debut in the first game of the 2019 season against GIF Sundsvall on 1 April.
On 30 August 2022, he signed for Ludogorets Razgrad of the Bulgarian First League.
