| Representative | 2012 (Current) District | Running in 2022 (New) District |
| James Arciero (D), Westford | 2nd Middlesex | 2nd Middlesex |
| Brian Michael Ashe (D), Longmeadow | 2nd Hampden | 2nd Hampden |
| Bruce J. Ayers (D), Quincy | 1st Norfolk | 1st Norfolk |
| Ruth B. Balser (D), Newton | 12th Middlesex | 12th Middlesex |
| Christine Barber (D), Somerville | 34th Middlesex | 34th Middlesex |
| John Barrett III (D), North Adams | 1st Berkshire | 1st Berkshire |
| Fred “Jay” Barrows (R), Mansfield | 1st Bristol | 1st Bristol |
| Jamie Belsito (D), Topsfield –>Succeeded by Estela A. Reyes (D), Lawrence | 4th Essex | 4th Essex |
| Donald Berthiaume Jr. (R), Spencer | 5th Worcester | 5th Worcester |
| David Biele. (D), Boston | 4th Suffolk | 4th Suffolk |
| Natalie Blais (D), Sunderland | 1st Franklin | 1st Franklin |
| Nicholas Boldyga (R), Southwick | 3rd Hampden | 3rd Hampden |
| Antonio F. D. Cabral (D), New Bedford | 13th Bristol | 13th Bristol |
| Daniel Cahill (D), Lynn | 10th Essex | 10th Essex |
| Linda Dean Campbell (D), Methuen *Not running for reelection –>Succeeded by Ryan M. Hamilton (D), Methuen | 15th Essex | 15th Essex |
| Peter Capano (D), Lynn | 11th Essex | 11th Essex |
| Daniel Carey (D), South Hadley | 2nd Hampshire | 2nd Hampshire |
| Gerard Cassidy (D), Brockton | 9th Plymouth | 9th Plymouth |
| Tackey Chan (D), Quincy | 2nd Norfolk | 2nd Norfolk |
| Michelle Ciccolo (D), Lexington | 15th Middlesex | 15th Middlesex |
| MIke Connolly (D), Cambridge | 26th Middlesex | 26th Middlesex |
| Rob Consalvo (D), Hyde Park | 14th Suffolk | 14th Suffolk |
| Edward F. Coppinger (D), Boston | 10th Suffolk | 10th Suffolk |
| Claira Cronin (D), Easton *Not running for reelection –>Succeeded by Rita A. Mendes (D), Brockton | 11th Plymouth | 11th Plymouth |
| Mark Cusak (D), Braintree | 5th Norfolk | 5th Norfolk |
| Josh S. Cutler (D), Duxbury | 6th Plymouth | 6th Plymouth |
| Angelo D’Emilia (R) Bridgewater | 8th Plymouth | 8th Plymouth |
| Michael Day (D), Stoneham | 31st Middlesex | 31st Middlesex |
| Marjorie C. Decker (D), Cambridge | 25th Middlesex | 25th Middlesex |
| David DeCoste (R), Hanover | 5th Plymouth | 5th Plymouth |
| Marcos A. Devers (D), Lawrence –>Succeeded by Francisco E. Paulino (D), Methuen | 16th Essex | 16th Essex |
| Kip Diggs, (D), Barnstable | 2nd Barnstable | 2nd Barnstable |
| Carol Doherty (D) Taunton | 3rd Bristol | 3rd Bristol |
| Mindy Domb (D), Amherst | 3rd Hampshire | 3rd Hampshire |
| Daniel M. Donahue (D), Worcester | 16th Worcester | 16th Worcester |
| Paul J. Donato (D), Medford | 35th Middlesex | 35th Middlesex |
| Sean Dooley (R), Norfolk*Not running for reelection –>Succeeded by Kevin Kalkut (D), Norfolk | 9th Norfolk | 9th Norfolk |
| William J. Driscoll, Jr. (D), Milton | 7th Norfolk | 7th Norfolk |
| Michelle DuBois (D), Brockton | 10th Plymouth | 10th Plymouth |
| Patricia Duffy (D), Holyoke | 5th Hampden | 5th Hampden |
| Peter Durant (R), Spencer | 6th Worcester | 6th Worcester |
| Carolyn Dykema (D), Holliston *Not running for reelection –>Succeeded by James C. Arena-DeRosa (D), Holliston | 8th Middlesex | 8th Middlesex |
| Lori A. Ehrlich, (D), Marblehead *Not running for reelection –>Succeeded by Jennifer Armini (D), Marblehead | 8th Essex | 8th Essex |
| Nikka Elugardo (D), Jamaica Plain –>Succeeded by Samantha Montano (D), Boston | 15th Suffolk | 15th Suffolk |
| Tricia Farley-Bouvier (D), Pittsfield | 3rd Berkshire | 2nd Berkshire |
| Kimberly N. Ferguson (R), Holden | 1st Worcester | 1st Worcester |
| Dylan A. Fernandes (D) Falmouth | Barnstable, Dukes & Nantucket | Barnstable, Dukes & Nantucket |
| Ann-Margaret Ferrante (D), Gloucester | 5th Essex | 5th Essex |
| Michael Finn, (D), West Springfield | 6th Hampden | 6th Hampden |
| Carole Fiola (D), Fall River | 6th Bristol | 6th Bristol |
| Brandy Fluker Oakley (D), Mattapan | 12th Suffolk | 12th Suffolk |
| Paul K. Frost (R), Auburn | 7th Worcester | 7th Worcester |
| William C. Galvin (D), Canton | 6th Norfolk | 6th Norfolk |
| Sean Garballey (D), Arlington | 23rd Middlesex | 23rd Middlesex |
| Denise Garlick (D), Needham | 13th Norfolk | 13th Norfolk |
| Colleen M. Garry (D), Dracut | 36th Middlesex | 36th Middlesex |
| Carmine Lawrence Gentile (D), Sudbury | 13th Middlesex | 13th Middlesex |
| Jessica Giannino (D), Revere | 16th Suffolk | 16th Suffolk |
| Susan Williams Gifford (R), Wareham | 2nd Plymouth | 2nd Plymouth |
| Thomas A. Golden, Jr. (D), Lowell –>Succeeded by Rodney M. Elliott (D), Lowell | 16th Middlesex | 16th Middlesex |
| Carlos Gonzalez (D), Springfield | 10th Hampden | 10th Hampden |
| Kenneth I. Gordon (D), Bedford | 21st Middlesex | 21st Middlesex |
| Tami Gouveia (D), Boston *Not running for reelection –>Succeeded by Simon Cataldo (D), Concord | 14th Middlesex | 14th Middlesex |
| Danielle W. Gregoire (D), Marlborough | 4th Middlesex | 4th Middlesex |
| Patricia Haddad (D), Somerset | 5th Bristol | 5th Bristol |
| Richard Haggerty (D), Woburn | 30th Middlesex | 30th Middlesex |
| Shelia Harrington (D), Groton *Not running for reelection –>This election is undergoing a recount | 1st Middlesex | 1st Middlesex |
| James Hawkins (D), Attleboro | 2nd Bristol | 2nd Bristol |
| Christopher Hendricks (D), New Bedford | 11th Bristol | 11th Bristol |
| Natalie Higgins (D), Leominster | 4th Worcester | 4th Worcester |
| Kate Hogan (D), Stow | 3rd Middlesex | 3rd Middlesex |
| Russell E. Holmes (D), Boston | 6th Suffolk | 6th Suffolk |
| Kevin G. Honan (D,) Boston | 17th Suffolk | 17th Suffolk |
| Vanna Howard (D), Lowell | 17th Middlesex | 17th Middlesex |
| Steven Howitt (R) Seekonk | 4th Bristol | 4th Bristol |
| Daniel J. Hunt (D), Dorchester | 13th Suffolk | 13th Suffolk |
| Bradley H. Jones, Jr. (R), North Reading | 20th Middlesex | 20th Middlesex |
| Hannah Kane (R), Shrewsbury | 11th Worcester | 11th Worcester |
| Patrick Joseph Kearney (D), Marshfield | 4th Plymouth | 4th Plymouth |
| Mary S. Keefe (D), Worcester | 15th Worcester | 15th Worcester |
| James Kelcourse (R), Amesbury –>Succeeded by Dawne Shand (D), Newburyport | 1st Essex | 1st Essex |
| Sally Kerans (D), Danvers | 13th Essex | 13th Essex |
| Kay Khan (D), Newton | 11th Middlesex | 11th Middlesex |
| Meghan Kilcoyne (D), Northborough | 12th Worcester | 12th Worcester |
| Michael Kushmerek (D), Fitchburg | 3rd Worcester | 3rd Worcester |
| Kathleen LaNatra (D), Kingston | 12th Plymouth | 12th Plymouth |
| John Lawn (D), Waltham | 10th Middlesex | 10th Middlesex |
| David Henry Argosky LeBoeuf (D), Leicester | 17th Worcester | 17th Worcester |
| Jack P. Lewis (D), Framingham | 7th Middlesex | 7th Middlesex |
| David Paul Linsky (D), Natick | 5th Middlesex | 5th Middlesex |
| Kate Lipper-Garabedian (D), Melrose | 32nd Middlesex | 32nd Middlesex |
| Jay Livingstone (D), Boston | 8th Suffolk | 8th Suffolk |
| Marc Lombardo (R), Billerica | 22nd Middlesex | 22nd Middlesex |
| Adrian Madaro (D), East Boston | 1st Suffolk | 1st Suffolk |
| John J. Mahoney (D), Worcester | 13th Worcester | 13th Worcester |
| Ellizabeth A. Malia (D), *Not running for reelection –>Succeeded by Judith A. Garcia (D), Chelsea | 11th Suffolk | 11th Suffolk |
| Ronald Mariano (D), Quincy | 3rd Norfolk | 3rd Norfolk |
| Paul Mark (D), Peru *Not running for reelection –>Tricia Farley-Bouvier moves from 3rd Berkshire to 2nd Berkshire | 2nd Berkshire | 2nd Berkshire |
| Christopher Markey (D), Dartmouth | 9th Bristol | 9th Bristol |
| Joseph McGonagle, Jr., (D), Everett | 28th Middlesex | 28th Middlesex |
| Joseph McKenna (D), Webster | 18th Worcester | 18th Worcester |
| Paul McMurtry (D), Dedham | 11th Norfolk | 11th Norfolk |
| Joan Meschino (D), Hull | 3rd Plymouth | 3rd Plymouth |
| Aaron Michlewitz (D), Boston | 3rd Suffolk | 3rd Suffolk |
| Christina Minicucci (D), North Andover –>Succeeded by Adrianne Ramos (D), North Andover | 14th Essex | 14th Essex |
| Liz Miranda (D), Dorchester –>Succeeded by Christopher J. Worrell (D), Boston | 5th Suffolk | 5th Suffolk |
| Leonard Mirra (R), Georgetown –>This election is undergoing a recount | 2nd Essex | 2nd Essex |
| Rady Mom (D), Lowell | 18th Middlesex | 18th Middlesex |
| Frank Moran (D), Lawrence | 17th Essex | 17th Essex |
| Michael J. Moran (D), Boston | 18th Suffolk | 18th Suffolk |
| David Muradian, Jr. (R), Grafton | 9th Worcester | 9th Worcester |
| Mathew Muratore (R), Plymouth | 1st Plymouth | 1st Plymouth |
| James M. Murphy (D), Weymouth | 4th Norfolk | 4th Norfolk |
| Brian W. Murray (D), Milford | 10th Worcester | 10th Worcester |
| Tram Nguyen (D), Andover | 18th Essex | 18th Essex |
| James J. O’Day (D), West Boylston | 14th Worcester | 14th Worcester |
| Jake Oliveira (D,) Ludlow *Not running for reelection –>Succeeded by Aaron L. Saunders, (D), Belchertown | 7th Hampden | 7th Hampden |
| Norman Orrall (R), Lakeville | 12th Bristol | 12th Bristol |
| Steven Owens (D), Watertown | 29th Middlesex | 29th Middlesex |
| Jerald Parisella (D), Beverly | 6th Essex | 6th Essex |
| Sarah K. Peake (D), Provincetown | 4th Barnstable | 4th Barnstable |
| Kelly Pease (R), Westfield | 4th Hampden | 4th Hampden |
| Alice Hanlon Peisch (D), Wellesley | 14th Norfolk | 14th Norfolk |
| Edward Philips (D), Sharon | 8th Norfolk | 8th Norfolk |
| William “Smitty” Pignatelli | 4th Berkshire | 3rd Berkshire |
| Angelo J. Puppolo, Jr. (D), Springfield | 12th Hampden | 12th Hampden |
| Orlando Ramos (D), Springfield | 9th Hampden | 9th Hampden |
| David Allen Robertson (D), Wilmington | 19th Middlesex | 19th Middlesex |
| Maria Robinson (D) Framingham –>Succeeded by Priscilla S. Sousa (D), Framingham | 6th Middlesex | 6th Middlesex |
| David M. Rogers (D), Cambridge | 24th Middlesex | 24th Middlesex |
| John H. Rogers (D), Norwood | 12th Norfolk | 12th Norfolk |
| Jeffery N. Roy (D), Franklin | 10th Norfolk | 10th Norfolk |
| Daniel J. Ryan (D), Charlestown | 2nd Suffolk | 2nd Suffolk |
| Lindsay Sabadosa (D), Northampton | 1st Hampshire | 1st Hampshire |
| Jon Santiago (D), Boston | 9th Suffolk | 9th Suffolk |
| Adam Scanlon (D), North Attleborough | 14th Bristol | 14th Bristol |
| Paul Schmid III (D), Westport | 8th Bristol | 8th Bristol |
| Danillo Sena (D), Acton | 37th Middlesex | 37th Middlesex |
| Alan Silvia (D), Fall River | 7th Bristol | 7th Bristol |
| Todd M. Smola (R), Warren | 1st Hampden | 1st Hampden |
| Michael Soter (R), Uxbridge | 8th Worcester | 8th Worcester |
| Thomas M. Stanley (D), Waltham | 9th Middlesex | 9th Middlesex |
| William M. Straus (D), Mattapoisett | 10th Bristol | 10th Bristol |
| Alyson Sullivan (R), Whitman | 7th Plymouth | 7th Plymouth |
| Paul Tucker (D), Salem *Not running for reelection –>Succeeded by Manny Cruz (D), Salem | 7th Essex | 7th Essex |
| Jeffrey Turco (D), Winthrop | 19th Suffolk | 19th Suffolk |
| Chynah Tyler (D), Boston | 7th Suffolk | 7th Suffolk |
| Steve Ultrino (D), Malden | 33rd Middlesex | 33rd Middlesex |
| Erica Uyterhoeven (D), Somerville | 27th Middlesex | 27th Middlesex |
| Andres X. Vargas (D), Haverhill | 3rd Essex | 3rd Essex |
| David Vieira (R), Falmouth | 3rd Barnstable | 3rd Barnstable |
| Tommy Vitolo (D), Brookline | 15th Norfolk | 15th Norfolk |
| Joseph F. Wagner (D), Chicopee *Not running for reelection –>Succeeded by Shirley B. Arriaga (D), Chicopee | 8th Hampden | 8th Hampden |
| Thomas Walsh (D), Peabody | 12th Essex | 12th Essex |
| Timothy Whelan (R), Brewster *Not running for reelection –>Succeeded by Christopher Flanagan (D), Dennis | 1st Barnstable | 1st Barnstable |
| Susannah Whipps (U), Athol | 2nd Franklin | 2nd Franklin |
| Bud L. Williams (D), Springfield | 11th Hampden | 11th Hampden |
| Donald Wong (R), Saugus | 9th Essex | 9th Essex |
| Steven Xiarhos, (R), Barnstable | 5th Barnstable | 5th Barnstable |
| Jonathan D. Zlotnik (D), Gardner | 2nd Worcester | 2nd Worcester |
| New –>Newly elected Kate Donaghue (D), Westborough | 19th Worcester |