Democrats and Republicans turned out to file nomination papers March 15, setting the June 8 primary ballot.

The candidates who filed March 15 included former Rockland Mayor Michael McNeil, who filed as a Republican to challenge Democratic Rep. Edward Mazurek. Katherine Cosgrove of Union filed as a Democrat to challenge Republican Rep. Wes Richardson in Maine House District 59. And Mark Berger and Olivia Atherton of Waldoboro filed as Democrats in House District 50, which is held by Democratic Rep. Wendy Pieh of Bremen who opted not to seek re-election.

Former Rockland Mayor Carol Maines filed March 15  to run as a Democrat for the Knox County Commission seat being vacated by Democrat Anne Beebe-Center. Republican Steven Dyer had already filed for the seat.

March 15 was the deadline for party candidates to file nomination papers in order to be on the June ballot.

Democrats and Republicans fielded candidates for every local legislative and county seat with the one exception being for district attorney. Republican Geoffrey Rushlau has no Democratic challenger.

Candidates not enrolled in either party have until June 1 to file papers if they want to run as independents for legislative or county seats on the Nov. 2 general election ballot.

There are several local contested races in the primary set for June 8. One is for the Democratic nomination for Knox County sheriff. Sheriff Donna Dennison of St. George is being challenged by Timothy Hoppe of St. George.

Two other local contested races include party nominations for House District 50, which covers Waldoboro, Nobleboro, Bremen and part of Jefferson. Republican former state Sen. Dana Dow of Waldoboro and Henry Simmons of Nobleboro will square off in their party’s primary while Olivia Atherton of Bremen and Mark Berger of Waldoboro will vie for the Democratic nomination.

The following is the lineup for local legislative and county seats:

* Senate District 20 (all of Lincoln County, the Knox County towns of Friendship and Washington, and the Kennebec County town of Windsor): Republican Sen. A. David Trahan of Waldoboro, Democrat Christopher Johnson of Somerville.

* Senate District 22 (all of Knox County except Friendship, Washington and Isle au Haut): Republican Sen. Christopher Rector of Thomaston, Democrat Adrian Humphreys of Hope. Humphreys said he is only a placeholder and after the June 8 primary, Democrats in the county will caucus to find another candidate for the November ballot.

* Senate District 23 (Waldo County): Democratic Rep. John Piotti of Unity, Republican Rep. Michael Thibodeau of Winterport. The seat will be open because Republican Sen. Carol Weston is barred from seeking another term due to the state’s term limits law.

* House District 36 (North Haven, Vinalhaven, Isle au Haut and the Hancock County towns of Brooklin, Deer Isle, Frenchboro, Stonington, Swan’s Island, and Tremont, and part of Mount Desert): Democrat Walter Kumiega III of Deer Isle, Green Party candidate John Harrington of Deer Isle, Republican Jacquelyn Spofford of Mount Desert. This seat is open because Maine House Speaker Hannah Pingree is barred from running again due to term limits.

* House District 44 (Appleton, Hope, Islesboro, Liberty, Lincolnville, Morrill and Searsmont): Democratic Rep. Andrew O’Brien of Lincolnville, Republican Wendy Pelletier of Hope.

* House District 46 (Camden and Rockport): Democratic Rep. Joan Welsh of Rockport, Republican Helen Shaw of Rockport.

* House District 47 (Rockland and part of Owls Head): Democratic Rep. Edward Mazurek of Rockland, Republican Michael McNeil of Rockland.

* House District 48 (Thomaston, St. George, South Thomaston, Matinicus, Criehaven and part of Owls Head): Democratic Rep. Chuck Kruger of Thomaston, Republican Steven Powell of Thomaston.

* House District 49 (Friendship, Cushing, Union and Warren): Republican Rep. Wes Richardson, Democrat Katherine Cosgrove of Union.

* House District 50 (Waldoboro, Bremen, Nobleboro and part of Jefferson): Democrats Olivia Atherton of Bremen and Mark Berger of Waldoboro, Republicans Dana Dow of Waldoboro and Henry Simmons of Nobleboro.

* House District 51 (Monhegan Island Plantation): Republican Rep. Jonathan McKane of Newcastle, Democrat Michael Devin of Newcastle.

* House District 52 (Somerville, Washington, Chelsea, Whitefield, Hibberts Gore and part of Jefferson): Democratic Rep. Elizabeth Miller of Somerville, Republican Deborah Sanderson of Chelsea.

* Knox County sheriff: Democrats, Sheriff Donna Dennison of St. George and Timothy Hoppe of Tenants Harbor, Republican Michael Phillips of Warren. Jeffrey Gallagher of Rockport has announced his candidacy as an independent and has filed his papers.

* Knox County judge of probate: Republican Judge Carol Emery, Democrat Sarah Ruef-LIndquist.

* Knox County commissioner for District 1 (Rockland, Rockport, Owls Head and South Thomaston): Democrat Carol Maines of Rockland, Republican Steven Dyer of Rockland.

* Waldo County commissioner District 1 (Lincolnville, Islesboro, Northport, Belfast, Belmont and Northport): Republican Commissioner Donald Berry Sr. of Belmont, Democrat Betty Johnson of Lincolnville.

Seats for which only one candidate has filed include:

* District attorney for Prosecutorial District 6 (Knox, Lincoln, Waldo and Sagadahoc counties): Republican District Attorney Geoffrey Rushlau.

* Lincoln County sheriff: Democratic Sheriff Todd Brackett of Nobleboro.

* Lincoln County commissioner District 2 (Waldoboro, Bremen, Bristol, Monhegan Island Plantation, Nobleboro and South Bristol): Democratic Commissioner William Blodgett of Waldoboro.

* Lincoln County registrar of probate: Republican Registrar Chester Fossett of Boothbay Harbor.

* Lincoln County treasurer: Republican Richard Newell Jr. of Newcastle.

* Lincoln County registrar of deeds: Registrar Rebecca Wotton of Bristol.

* Waldo County sheriff: Republican Sheriff Scott Story of Monroe.

* Waldo County treasurer: Treasurer David Parkman of Palermo.

* Waldo County register of deeds: Republican Register Deloris Page of Belfast.