Justin Antonius Lonwijk (born 21 December 1999) is a professional footballer who plays as a midfielder for Viborg FF in the Danish Superliga, on loan from Ukrainian side Dynamo Kyiv.

[4] Utrecht manager John van den Brom selected Lonwijk for the starting line-up in the two tiers against Zrinjski Mostar in the UEFA Europa League qualifiers.

[7] On 25 January 2021, Lonwijk joined Danish 1st Division club Viborg FF on loan from Utrecht for the rest of the season with an option to buy.

[11] On 10 November, he scored his first goal for Dynamo by slotting home a Viktor Tsyhankov cross, thereby contributing to the team's 3–1 league win over Oleksandriya.

[12] On 25 July 2023, Belgian Pro League side Anderlecht announced the signing of Lonwijk on a season-long loan from Dynamo Kyiv, with an option to buy the player at the end of the season.