OCFC eventually fell to CD Aguiluchos USA by a score of 1–0 in the Regional Final, one game away from reaching the national semifinals.

OCFC defeated FC Arizona 3-0 in a Southwest Conference play-in match to advance to the regional quarterfinals.

After a 3–1 win over ASC San Diego in the Quarterfinals, OCFC defeated FC Golden State 4-2 to advance to the Regional Finals for the second season in a row and qualified to the 2019 U.S. Open Cup.

Orange County Football Club participated in the UPSL Western Conference - Socal North League.

[8] Orange County FC qualified to the 2018 U.S. Open Cup by finishing as one of the top eight teams in the 2017 NPSL Playoffs.

Orange County SC led 2-1 in stoppage time but center back Ryan Holland scored the equalizer to tie the game at 2-2.