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

Sen. Susan CollinsSusan CollinsGOP rep faces testy crowd at constituent meeting over ObamaCare DeVos vows to be advocate for 'great' public schools GOP senators introducing ObamaCare replacement Monday MORE (R-Maine) has cast more than 5,500 consecutive votes since she was sworn into office in 1997. Reps. Justin AmashJustin AmashA well-crafted budget amendment can succeed GOP lawmaker on Trump's Lewis tweets: 'Dude, just stop' House passes Mattis waiver, setting up quick confirmation MORE (R-Mich.) and Steve WomackSteve WomackTrump tweets about flag burning, setting off a battle Students across the country spend their 'summer recess' getting involved in politics After the balloons have fallen MORE (R-Ark.), who were elected in 2010, have also not missed a vote. The others are Sen. Deb FischerDeb FischerU.S. Supreme Court’s 'Waters of the U.S.' gift to the Trump administration Right renews push for term limits as Trump takes power GOP makes pitch for replacing ObamaCare MORE (R-Neb.) and Reps. Derek KilmerDerek KilmerWorking together to confront country’s most pressing issues Junior Dems plot strategy as leadership vote looms Overnight Cybersecurity: Fallout from Yahoo's massive breach | House panel holds Clinton IT aide in contempt | Privacy groups want WhatsApp probe MORE (D-Wash.) and David Jolly (R-Fla.).

This Congress, 12 other members have logged perfect attendance records, including Sen. Charles SchumerCharles SchumerDemocrats and the boycott of Trump's inauguration The Hill's 12:30 Report Why Democrats fear a successful inaugural address from Trump 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 DonnellyJoe DonnellySenators introduce dueling miners bills Government to begin calling Indiana residents Hoosiers Pence meets with Kaine, Manchin amid Capitol Hill visit MORE (D-Ind.)

Deb Fischer (R-Neb.)

Chuck GrassleyChuck GrassleyGOP senator: Trump budget chief could face confirmation 'problems' Jeff Sessions will protect life Justice, FBI to be investigated over Clinton probes MORE (R-Iowa)

Kay HaganKay Hagan Former Sen. Kay Hagan in ICU after being rushed to hospital GOP senator floats retiring over gridlock 2016’s battle for the Senate: A shifting map MORE (D-N.C.)

Charles Schumer (D-N.Y.)

Ron WydenRon WydenHere comes Trump-o-nomics Lawmakers join women's marches in DC and nationwide Senate confirms first nominees of Trump era MORE (D-Ore.)

House

Justin Amash (R-Mich.)

John BarrowJohn BarrowDem files Ethics complaint on Benghazi panel Barrow thanks staff in farewell speech The best and the worst of the midterms 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 McKinleyW.Va. attorney general may challenge Manchin Overnight Tech: Trump meets Alibaba founder | Uber to make some data public | GOP Lawmakers tapped for key tech panels 10 Senate seats that could flip in 2018 MORE (R-W.Va.)

Steve Womack (R-Ark.)

 

Vivian Hughbanks contributed.