The 2018 Orange County SC season was the club's eighth season of existence, and their eighth consecutive season in the United Soccer League, the second tier of American soccer. Orange County also competed in the U.S. Open Cup. The season covered the period from October 14, 2017 to the beginning of the 2019 USL season. 2018 marked the first season with Braeden Cloutier as the club's head coach, and Cloutier's first season as a professional head coach. The season averaged 3,095 fans per home match, and was the second consecutive season that the average attendance had increased.