Former Gov. Mark Sanford and state Rep. Peter McCoy of James Island have filed for the 1st Congressional District, bringing the total number of Republican candidates to 13.

On the Democratic side, educator Bobbie Rose, who lost her bid for the seat last November, also filed, bringing that party’s field to three.

The seat became vacant when Tim Scott was appointed a U.S. senator, and Republican and Democratic voters will go to the polls March 19 to chose their candidate. Runoffs will be held on April 2 if no one gets more than 50 percent of that vote.

Other Republican candidates include Goose Creek businessman Jeff King, state Rep. Chip Limehouse of Charleston, Sullivan’s Island businessman Keith Blandford, state Sen. Larry Grooms of Bonneau, Tim Larkin, former Charleston County Councilman Curtis Bostic, former state Sen. John Kuhn, former Dorchester County Sheriff Ray Nash, state Rep. Andy Patrick, R-Hilton Head Island, Charleston teacher Teddy Turner and former Charleston County School Board member Elizabeth Moffly.

The Democrats include Rose, Clemson Restoration Institute development director Elizabeth Colbert-Busch and Charleston businessman Martin Skelly.

Reach Robert Behre at 937-5771.