Great Falls Town Councilman Marty Henson has resigned from his seat on council.
Henson turned in his resignation, effective immediately, on Friday, Sept. 23.
Town Clerk Julie Blackwell said the resignation cited personal reasons.
Henson is serving his second term on council. His seat will expire in 2018.
A special election to fill Henson’s seat will be held on Tuesday, Dec. 20, according to Chester County Elections & Registration Executive Director Terry Graham.