Ottawa South United

The club was founded as a youth soccer club in 2003 through a merger between Osgoode – Rideau Soccer Association (founded in 1972) and South Nepean United (founded in 1980). The club offers recreational and competitive in the Greater Ottawa Region. The Force Academy program draws players from across Eastern Ontario and Western Quebec. OSU was recognized by Ontario Soccer with the Gold Award for Club Excellence, was a founding member of the Ontario Player Development League (OPDL) and one of the first 39 clubs in Canada to be granted a National Youth Club License.

In 2016, OSU partnered with American youth club Dallas Texans SC and Nike, which made it a part of the Dallas Texans' affiliation with Spanish La Liga club Atlético Madrid. Soon after, Atlético, with OSU, hosted a soccer camp in the city, a precursor to the Spanish club ultimately forming Atlético Ottawa to play in the Canadian Premier League in 2020. In 2016, they also partnered with Major League Soccer club Vancouver Whitecaps FC to launch a new Whitecaps FC Ottawa Academy Centre, in partnership with the Whitecaps FC Residency program where players could proceed in the next stage of their development. In 2020, they partnered with Canadian Premier League club Atlético Ottawa becoming the first club to join Atlético's ‘Community Partnership Soccer Program.’ Through this, OSU will have access to coaching development, player development, Atlético player appearances, and open practices, while their male and female semi-pro teams will wear a “Powered by Atlético” crest on their sleeve. As part of the partnership, the club announced that their PLSQ teams will be known as OSU Atlético and the teams wearing Atlético's red-and-white striped kits, which was formalized in 2023.