| Fire department | City | County | Career firefighters | Website |
|---|---|---|---|---|
| New Haven Fire Department | New Haven | New Haven | 400 | — |
| Hartford Fire Department | Hartford | Hartford | 354 | Official site |
| Bridgeport Fire Department | Bridgeport | Fairfield | 288 | — |
| Stamford Fire Department | Stamford | Fairfield | 262 | Official site |
| Waterbury Fire Department | Waterbury | New Haven | 250 | Official site |
| New Britain Fire Department | New Britain | Hartford | 141 | — |
| City of Norwalk Fire Department | Norwalk | Fairfield | 140 | Official site |
| East Hartford Fire Department | East Hartford | Hartford | 132 | — |
| Milford Fire Rescue | Milford | New Haven | 112 | Official site |
| Danbury Fire Department | Danbury | Fairfield | 110 | — |
| Hamden Fire Department | Hamden | New Haven | 102 | Official site |
| City of Meriden, Department of Fire and Emergency Services | Meriden | New Haven | 100 | Official site |
| Stratford Fire Department | Stratford | Fairfield | 98 | Official site |
| Fairfield Fire Department | Fairfield | Fairfield | 96 | — |
| West Hartford Fire Department | West Hartford | Hartford | 90 | Official site |
| Bristol Fire Department | Bristol | Hartford | 87 | Official site |
| Town of Manchester Fire- Rescue- EMS Department | Manchester | Hartford | 79 | Official site |
| New London Fire Department | New London | New London | 78 | Official site |
| Westport Fire Department | Westport | Fairfield | 67 | — |
| Wallingford Fire Department and EMS | Wallingford | New Haven | 65 | — |
| Middletown Fire Department | Middletown | Middlesex | 63 | — |
| West Haven Fire Department | West Haven | New Haven | 55 | Official site |
| Torrington Fire Department | Torrington | Litchfield | 54 | Official site |
| US Naval Submarine Base NLON Fire Department | Groton | New London | 54 | — |
| City of Norwich Fire Department | Norwich | New London | 52 | — |
| University of Connecticut Fire Department | Storrs | Tolland | 50 | Official site |
| Mohegan Tribal Fire Department | Uncasville | New London | 46 | — |
| North Haven Fire Department | North Haven | Lower CT River Vly | 45 | Official site |
| Branford Fire Department | Branford | New Haven | 44 | — |
| East Haven Fire Department | East Haven | New Haven | 44 | Official site |
| Guilford Fire Department | Guilford | New Haven | 41 | Official site |
| Naugatuck Fire Department | Naugatuck | New Haven | 41 | Official site |
| Ridgefield Fire Department | Ridgefield | Fairfield | 37 | Official site |
| South Fire District | Middletown | Middlesex | 37 | Official site |
| West Shore Fire District | West Haven | New Haven | 35 | Official site |
| Bradley International Airport Fire Department | Windsor Locks | Hartford | 34 | — |
| Southington Fire Department | Southington | Hartford | 30 | — |
| Willimantic Fire Department | Willimantic | Windham | 29 | — |
| Wilton Fire Department | Wilton | Fairfield | 27 | Official site |
| New Canaan Fire Department | New Canaan | Fairfield | 25 | Official site |
| Mashantucket-Pequot Fire & Emergency Services | Mashantucket | New London | 24 | — |
| Waterford Fire Department | Waterford | Lower CT River Vly | 24 | Official site |
| Poquonnock Bridge Fire Department | Groton | New London | 22 | Official site |
| Mansfield Fire Department | Storrs-Mansfield | Tolland | 20 | — |
| Thompsonville Fire department | Enfield | Hartford | 19 | Official site |
| University of Connecticut Health Center | Farmington | Hartford | 19 | Official site |
| Allingtown Volunteer Fire Department | West Haven | New Haven | 17 | — |
| City of Groton Fire Department | Groton | New London | 17 | — |
| Turn of River Fire Department, Inc. | Stamford | Fairfield | 17 | Official site |
| Connecticut Air National Guard Fire Emergency Services | East Granby | Hartford | 12 | — |
| Cromwell Fire Department | Cromwell | Middlesex | 12 | Official site |
| Hazardville Fire Department | Enfield | Hartford | 10 | Official site |
| Town of Montville Fire Department | Uncasville | New London | 10 | — |
| Belltown Fire Department, Inc. | Stamford | Fairfield | 9 | Official site |
| Enfield Fire Department | Enfield | Hartford | 9 | Official site |
| Long Ridge Fire Company | Stamford | Fairfield | 9 | Official site |
| New Hope Fire Company, d.b.a. Glenbrook Fire Department | Stamford | Fairfield | 9 | Official site |
| Town of Farmington Fire Department | Farmington | Hartford | 9 | Official site |
| Easton Volunteer Fire Company No. 1 | Easton | Fairfield | 8 | Official site |
| Somers Fire Department | Somers | Tolland | 8 | Official site |
| Suffield Fire Department | Suffield | Hartford | 8 | Official site |
| Ashford Volunteer Fire Department, Inc. | Ashford | Windham | 7 | Official site |
| Greenwich Vol Hose & Chemical Company #2 | Greenwich | Fairfield | 7 | — |
| Colchester Hayward Fire Department | Colchester | New London | 6 | Official site |
| Manchester Fire Department 8th Utilities District | Manchester | Hartford | 6 | Official site |
| Tolland Fire Department | Tolland | Tolland | 6 | Official site |
| Westfield Volunteer Fire Department | Middletown | Middlesex | 6 | Official site |
| Blue Hills Fire Department | Bloomfield | Hartford | 5 | Official site |
| Old Mystic Fire Department | Mystic | New London | 5 | — |
| Shaker Pines Fire District | Enfield | Hartford | 5 | — |
| Cheshire Fire Department, Inc. | Cheshire | New Haven | 4 | Official site |
| Eagleville Fire Department | Storrs | Tolland | 4 | — |
| North Thompsonville Fire Department | Enfield | Hartford | 4 | — |
| Willington Fire Department, Inc. #1 | Willington | Tolland | 4 | Official site |
| Gales Ferry Fire Company, Inc. | Gales Ferry | New London | 3 | Official site |
| Mohegan Fire Company | Uncasville | New London | 3 | Official site |
| Pawcatuck Fire District | Pawcatuck | New London | 3 | — |
| Poquetanuk Fire Department | Preston | New London | 3 | Official site |
| Preston City Volunteer Fire Department | Preston | New London | 3 | Official site |
| Dayville Fire Company | Dayville | Windham | 2 | Official site |
| Hebron Volunteer Fire Department | Hebron | Tolland | 2 | — |
| Ledyard Fire Company, District NO 1, Inc. | Ledyard | New London | 2 | Official site |
| Mystic Fire Department | Mystic | New London | 2 | Official site |
| Shelton Fire Department | Shelton | Fairfield | 2 | Official site |
| Town of Winchester Fire Department | Winsted | Litchfield | 2 | — |
| Ansonia Fire Department | Ansonia | New Haven | 1 | — |
| Barkhamsted East Volunteer Fire Company #1, Inc. | Barkhamsted | Litchfield | 1 | Official site |
| Glastonbury Fire Department | Glastonbury | Hartford | 1 | Official site |
| New Hartford Fire Department | New Hartford | Litchfield | 1 | Official site |
| Noank Fire District | Groton | New London | 1 | Official site |
| Salem Volunteer Fire Company, Inc. | Salem | New London | 1 | Official site |
| Winsted Fire Department | Winsted | Litchfield | 1 | Official site |
Largest first by career firefighters, as each employer reports it to its federal registry.
Source: U.S. Fire Administration (FEMA), National Fire Department Registry. Data captured September 30, 2026.