Six members of Congress have never missed a vote in their careers on Capitol Hill.

Sen. Susan CollinsSusan Margaret CollinsMaine House speaker announces challenge to Collins Senate seat GOP senators divided over approach to election security GOP lawmakers want Mulvaney sidelined in budget talks MORE (R-Maine) has cast more than 5,500 consecutive votes since she was sworn into office in 1997. Reps. Justin AmashJustin AmashSupreme Court set to deliver ruling on census citizenship question Democrats seek to ban federal spending at Trump businesses DC theatre to host 11-hour reading of the Mueller report MORE (R-Mich.) and Steve WomackStephen (Steve) Allen WomackPelosi slated to deliver remarks during panel hearing on poverty Trump throws support behind 'no brainer' measure to ban burning of American flag CBO: Medicare for All gives 'many more' coverage but 'potentially disruptive' MORE (R-Ark.), who were elected in 2010, have also not missed a vote. The others are Sen. Deb FischerDebra (Deb) Strobel FischerThe Hill's Morning Report - Trump and House Democrats resume battle Steve King denied seat on Air Force One for Trump trip to Iowa: report Iowa Democrat calls foul on White House over Trump ethanol tour invite MORE (R-Neb.) and Reps. Derek KilmerDerek Christian KilmerCongressional panel calls for lobbying disclosure reforms Bipartisan group of senators seeks to increase transparency of online political ads Pro-business Dem group sees boost in fundraising MORE (D-Wash.) and David Jolly (R-Fla.).

This Congress, 12 other members have logged perfect attendance records, including Sen. Charles SchumerCharles (Chuck) Ellis SchumerMcConnell-backed Super PAC says nominating Roy Moore would be 'gift wrapping' seat to Dems McConnell vows to 'vigorously' oppose Moore's Senate bid Pelosi: Trump delay on Harriet Tubman is 'an insult to the hopes of millions' MORE (D-N.Y.) and House Majority Whip Kevin McCarthy (R-Calif.).

Rep. Leonard Lance (R-N.J.), who is among the dozen, noted that his state is relatively close to Washington, D.C. But he takes pride in making every roll call, saying when an appointment or meeting conflicts with a vote, “I excuse myself form the office to make sure I am on the floor at the appropriate time.”

For this article, The Hill reviewed roll call data on Congress.gov as well as govtrack.us.

Current members who have never missed a vote

Senate

Susan Collins (R-Maine) (started serving in 1997)

Deb Fischer (R-Neb.) (started serving in 2013)

House

Justin Amash (R-Mich.) (started serving in 2011)

Derek Kilmer (D-Wash.) (started serving in 2013)

Steve Womack (R-Ark.) (started serving in 2011)

David Jolly (R-Fla.) (started serving in 2014)

Current members who have not missed votes in this Congress

Senate

Susan Collins (R-Maine)

Joe DonnellyJoseph (Joe) Simon DonnellyConservatives spark threat of bloody GOP primaries Anti-corruption group hits Congress for ignoring K Street, Capitol Hill 'revolving door' K Street giants scoop up coveted ex-lawmakers MORE (D-Ind.)

Deb Fischer (R-Neb.)

Chuck GrassleyCharles (Chuck) Ernest GrassleyGrassley raises concerns about objectivity of report critical of GOP tax law's effects Overnight Health Care: Key Trump drug pricing proposal takes step forward | Missouri Planned Parenthood clinic loses bid for license | 2020 Democrats to take part in Saturday forum on abortion rights Key Trump proposal to lower drug prices takes step forward MORE (R-Iowa)

Kay HaganKay Ruthven HaganTillis trails Democratic challenger by 7 points in North Carolina poll North Carolina businessman will challenge Tillis in GOP primary Embattled senators fill coffers ahead of 2020 MORE (D-N.C.)

Charles Schumer (D-N.Y.)

Ron WydenRonald (Ron) Lee WydenOvernight Defense: House passes T spending package with defense funds | Senate set to vote on blocking Saudi arms sales | UN nominee defends climate change record Grassley announces opposition to key Trump proposal to lower drug prices Exclusive: Trump administration delayed releasing documents related to Yellowstone superintendent's firing MORE (D-Ore.)

House

Justin Amash (R-Mich.)

John BarrowJohn Jenkins BarrowRepublican wins Georgia secretary of state runoff to replace Kemp The most important runoff election is one you probably never heard of Our democracy can’t afford to cut legal aid services from the budget MORE (D-Ga.)

Henry Cuellar (D-Texas)

Charles Dent (R-Pa.)

David Jolly (R-Fla.) (started serving in 2014)

Derek Kilmer (D-Wash.)

Leonard Lance (R-N.J.)

Billy Long (R-Mo.)

Kevin McCarthy (R-Calif.)

David McKinleyDavid Bennett McKinleyBipartisan former EPA chiefs say Trump administration has abandoned agency's mission Thirty-four GOP members buck Trump on disaster bill Divisions emerge over House drug price bills MORE (R-W.Va.)

Steve Womack (R-Ark.)

 

Vivian Hughbanks contributed.