Ready to vote? The Massachusetts primaries are today.

The secretary of state's website has complete lists of the Democratic, Republican and Libertarian primary candidates; below is a guide to the contested races and our coverage of many of them. (Uncontested races are not listed here, but are included in the links above.) And if you're looking for a voter guide on the state Senate and state House primaries, go here.

Useful Links

Governor

Our complete coverage of the gubernatorial primaries

Democratic Primary

Jay Gonzalez, left, and Bob Massie (Robin Lubbock, Jesse Costa/WBUR)

Republican Primary

Gov. Charlie Baker and his Republican challenger, Scott Lively, during WBUR interviews (Jesse Costa/WBUR)

Lieutenant Governor

Democratic Primary

U.S. Senate

Republican Primary

State Rep. Geoff Diehl, left, John Kingston and Beth Lindstrom are competing in the U.S. Senate Republican primary, for a chance to take on Sen. Elizabeth Warren. (Winslow Townson/AP)

Attorney General

Republican Primary

James McMahon (campaign website)

Daniel Shores (campaign website)

Secretary Of State

Democratic Primary

Massachusetts Secretary of State Bill Galvin, left, and his Democratic challenger, Boston City Councilor Josh Zakim (Michael Dwyer/AP)

7th Congressional District

Democratic Primary

U.S. Rep. Michael Capuano and his Democratic challenger, Boston City Councilor Ayanna Pressley (Robin Lubbock, Jesse Costa/WBUR)

3rd Congressional District

Democratic Primary

The 10 Democratic candidates in the 3rd district, clockwise from top left: Jeff Ballinger, Alexandra Chandler, Beej Das, Rufus Gifford, Leonard Golder, Daniel Koh, Barbara L'Italien, Bopha Malone, Juana Matias and Lori Trahan (Courtesy of the campaigns)

Our profile of the changing district

What the 10 candidates (above) say differentiates them

1st Congressional District

Democratic Primary

Rep. Richard Neal and his Democratic challenger, Tahirah Amatul-Wadud (AP)

New England Public Radio profile of the race

2nd Congressional District

Republican Primary

Tracy Lovvorn (campaign website)

Kevin Powers (campaign website)

4th Congressional District

Democratic Primary

Rep. Joseph Kennedy III (campaign website)

Gary Rucinski (campaign website)

5th Congressional District

Republican Primary

John Hugo (campaign website)

Louis Kuchnir

8th Congressional District

Democratic Primary

9th Congressional District

Democratic Primary

Rep. Bill Keating (campaign website)

Bill Cimbrelo (campaign website)

Suffolk County District Attorney

Democratic Primary

The candidates for Suffolk district attorney, clockwise from top left: Evandro Carvalho, Linda Champion, Gregory Henning, Rachael Rollins, Shannon McAuliffe and Michael Maloney. Five candidates are Democrats, Maloney is an independent. (Courtesy of the campaigns)

Our profile of the race

What the six candidates say about bail, data and more

Middlesex County District Attorney

Democratic Primary

DA Marian Ryan (campaign website)

Donna Patalano (campaign website)

Berkshire County District Attorney

Democratic Primary

For all other contested primaries — for county commissioner, clerk of courts, Governor's Council, register of deeds — visit the secretary of state's website.