The 2018 Charleston Battery season was the club's 26th year of existence, their 15th season in the second tier of the United States Soccer Pyramid.

It was their eighth season in the United Soccer League as part of the Eastern Conference.

In the 2017 USL Playoffs, Charleston were upset in the first round by the New York Red Bulls II.

Elsewhere, the Battery reached the fourth round of the 2017 U.S. Open Cup, losing 2–3 to MLS outfit, Atlanta United FC.

Note: Flags indicate national team as defined under FIFA eligibility rules.