The 2015 Orange County Blues FC season was the club's sixth season of existence and their sixth season playing in the third tier of American soccer, USL.

The Blues were dominant all season, winning fourteen games and placing first in the Western Conference with a record of 14–5–9,[1] which automatically qualified them for the USL Playoffs Semi-Finals.

[2] Despite their dominance throughout the season, they were ultimately shut-out in a 2–0 defeat against rivals LA Galaxy II at StubHub Center.

[3] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

As a member of the USL, the Blues entered the U.S. Open Cup in the second round, facing amateur club PSA Elite, a member of the USASA.