BATH, Maine — A special election to choose a replacement for former District 19 Sen. Seth Goodall will take place on Aug. 27, Secretary of State Matthew Dunlap announced Monday.

Goodall, a Richmond Democrat who served as Senate majority leader this year, resigned on July 9 to take over as New England regional director of the U.S. Small Business Association.

Also on Monday, the Sagadahoc County Democratic Committee announced that it would hold its nominating caucus for the Senate 19 seat at 6 p.m. July 22, at Mt. Ararat High School in Topsham.

Three candidates have already announced they will seek the Democratic nomination: Will Neilson and Eloise Vitelli, both of Arrowsic, and David Sinclair of Bath.

As previously announced, a candidate to represent the Green Independent party in the special election will be chosen at that party’s caucus at 7 p.m. Wednesday at the Topsham Municipal Building.

No candidate has announced a formal bid to seek the Green Independent nomination.

Sagadahoc County Republicans will caucus at 6:30 p.m. July 23, at the Smith-Tobey American Legion Post in Bath.

Paula Benoit of Phippsburg, a Republican who represented District 19 from 2006 to 2007, has announced that she will seek her party’s nomination.

The parties have until 5 p.m. July 30 to submit a certificate of nomination listing their nominees to the secretary of state’s office.

Senate District 19 includes Sagadahoc County and the town of Dresden.

Democrats currently hold 19 seats in the Maine Senate, Republicans hold 15 and there is one independent. No Green Independent party candidate has ever won a Maine Senate seat.