Justin Gerard Rennicks (born March 20, 1999) is an American professional soccer player who plays as a forward for Veikkausliiga club AC Oulu.

Rennicks was born in South Hamilton, Massachusetts, and played his college career at Indiana University between 2017 and 2018, making 29 appearances, scoring nine goals and tallying one assist.

[5] On January 18, 2019, Rennicks opted to leave college early and signed a Homegrown Player contract with Major League Soccer side New England Revolution.

On April 9, 2022, Rennicks scored his first MLS goal, redirecting a DeJuan Jones cross past Inter Miami CF's Nick Marsman in the 11th minute of the match.

[9] On 7 December 2023, AC Oulu in Finnish Veikkausliiga announced the signing of Rennicks on a one-year deal, with an option for an additional year, starting in 2024.