Three candidates will run in April for the West Tisbury selectman’s seat currently held by chairman Glenn R. Hearn.

Richard Knabel, a member of the town finance committee, and James Powell, town representative on the Martha’s Vineyard Commission, have taken out nomination papers, as has Mr. Hearn who is seeking reelection. Mr. Knabel publicly declared his candidacy last week. Mr. Hearn and Mr. Powell have already filed candidacy papers, according to town clerk Prudence Whiting.

The annual town election is April 10.

Five candidates are also running for library trustee. In addition to incumbents Linda M. Hearn and Hermine Hull, candidates include Cynthia Riggs, Paul A. Garcia and Gregory Orcutt. Library trustees serve for three years.

To date, 21 residents are seeking election to 17 offices. Nomination papers must be filed by 5 p.m. on Thursday, Feb. 21,