School Board members in Lexington-Richland 5 are free to continue praying at the start of their meetings.
U.S. District Court Judge Cameron Currie dismissed a legal challenge to the practice brought by two former students and the Freedom From Religion Foundation.
The students lacked standing for their challenge since they never attended a board meeting, the Dec. 1 ruling said.
Board members start sessions with either a prayer or moment of silence.
The challenge to board prayer was a follow-up to a challenge that made prayer optional at high school graduations.