| FAIRFIELD COUNTRY DAY SCHOOL CORPORATION, THEFairfield, CT · Active | Fairfield, CT | Corporation | May 5, 1941 | Active |
| FAIRFIELD COUNTY LEAGUE OF SPORTSMEN'S CLUBS, INCORPORATED, THEFairfield, CT · Forfeited | Fairfield, CT | Corporation | Apr 12, 1938 | Forfeited |
| FAIRFIELD EDUCATION ASSOCIATION, INC.Fairfield, CT · Active | Fairfield, CT | Corporation | Apr 27, 1966 | Active |
| FAIRFIELD HISTORICAL SOCIETYFairfield, CT · Active | Fairfield, CT | Corporation | Feb 9, 1903 | Active |
| FAIRFIELD HOOK AND LADDER COMPANY, THEFairfield, CT · Forfeited | Fairfield, CT | Corporation | May 8, 1895 | Forfeited |
| FAIRFIELD KIWANIS CLUB, INC.Fairfiel, CT · Active | Fairfiel, CT | Corporation | Nov 16, 1967 | Active |
| GAELIC AMERICAN CLUB, INCORPORATED, THEFairfield, CT · Active | Fairfield, CT | Corporation | Nov 28, 1950 | Active |
| GEORGE ALFRED SMITH POST NO. 74, OF THE AMERICAN LEGION, INCORPORATEDFairfield, CT · Active | Fairfield, CT | Corporation | Apr 4, 1922 | Active |
| BANNOW-LARSON FOUNDATION, INC. THEFairfield, CT · Dissolved | Fairfield, CT | Corporation | Aug 18, 1966 | Dissolved |
| GREENFIELD HILL CHAPTER #1861 OF AARP, INC.Fairfield, CT · Dissolved | Fairfield, CT | Corporation | Aug 26, 1974 | Dissolved |
| GREENFIELD HILL VILLAGE IMPROVEMENT SOCIETY, INC., THEFairfield, CT · Active | Fairfield, CT | Corporation | Jan 29, 1973 | Active |
| GREENFIELD HILL GRANGE, #133Fairfield, CT · Active | Fairfield, CT | Corporation | Jan 20, 1897 | Active |
| H. SMITH RICHARDSON GOLF CLUB, INCFairfield, CT · Active | Fairfield, CT | Corporation | Jun 9, 1972 | Active |
| JUNIOR WOMEN'S CLUB OF FAIRFIELD, INC.Fairfield, CT · Forfeited | Fairfield, CT | Corporation | Oct 21, 1966 | Forfeited |
| FATHER COLEMAN FOUNDATION OF FAIRFIELD, INC.Fairfield, CT · Active | Fairfield, CT | Corporation | Aug 22, 1947 | Active |
| LANTERN POINT ASSOCIATION, INC.Fairfield, CT · Active | Fairfield, CT | Corporation | Sep 22, 1976 | Active |
| LIONS CLUB OF FAIRFIELD, INCORPORATED THEFairfield, CT · Dissolved | Fairfield, CT | Corporation | Apr 10, 1943 | Dissolved |
| MILL RIVER WETLAND COMMITTEE, INC.Fairfield, CT · Active | Fairfield, CT | Corporation | Dec 19, 1969 | Active |
| THE ZIEFF FAMILY FUND, INC.Fairfield, CT · Active | Fairfield, CT | Corporation | Jun 27, 1949 | Active |
| NUTMEG SOARING ASSOCIATION, INCORPORATEDFairfield, CT · Active | Fairfield, CT | Corporation | Sep 21, 1956 | Active |
| PATTERSON CLUB INCORPORATEDFairfield, CT · Active | Fairfield, CT | Corporation | Jun 20, 1930 | Active |
| PENFIELD SAIL AND POWER SQUADRON, INC.Fairfield, CT · Active | Fairfield, CT | Corporation | Oct 21, 1969 | Active |
| PEQUOT FISH AND GAME CLUB, INCORPORATED, THEFairfield, CT · Active | Fairfield, CT | Corporation | May 1, 1947 | Active |
| SASQUA GARDEN CLUB, INC.Fairfield, CT · Active | Fairfield, CT | Corporation | Jul 22, 1969 | Active |
| SOUTHPORT AREA ASSOCIATION, INCORPORATEDFairfield, CT · Active | Fairfield, CT | Corporation | Sep 25, 1942 | Active |
| SOUTHWESTERN CONNECTICUT EMERGENCY MEDICAL SERVICES ADVISORY COUNCIL, INC.Fairfield, CT · Active | Fairfield, CT | Corporation | Nov 16, 1976 | Active |
| STRATFORD GUN COLLECTORS ASSOCIATION, INC., THEFairfield, CT · Active | Fairfield, CT | Corporation | Jan 7, 1954 | Active |
| BRIDGEPORT HOSPITAL FRIENDS OF PEDIATRICS, INC.Fairfield, CT · Active | Fairfield, CT | Corporation | Jun 15, 1906 | Active |
| FAIRFIELD COUNSELING SERVICES, INCORPORATEDFairfield, CT · Merged | Fairfield, CT | Corporation | Nov 16, 1970 | Merged |
| FAIRFIELD CHAMBER OF COMMERCE, INCORPORATED THEFairfield, CT · Active | Fairfield, CT | Corporation | Jul 3, 1946 | Active |
| FAIRFIELD POLICE ATHLETIC LEAGUE, INCORPORATED THEFairfield, CT · Dissolved | Fairfield, CT | Corporation | Jan 19, 1955 | Dissolved |
| LANDMARK HOMES, INC.Fairfield, CT · Dissolved | Fairfield, CT | Corporation | Aug 19, 1977 | Dissolved |
| EDMOND CHITTENDEN, INC.Fairfield, CT · Active | Fairfield, CT | Corporation | Dec 6, 1977 | Active |
| RICHARD S. FREEMAN, LTD.Fairfield, CT · Dissolved | Fairfield, CT | Corporation | Aug 9, 1977 | Dissolved |
| FAIRFIELD DENTAL ASSOCIATES, P.C.Fairfield, CT · Active | Fairfield, CT | Corporation | Feb 22, 1974 | Active |
| NEWTOWN BOARD OF REALTORS, INC.Fairfield, CT · Active | Fairfield, CT | Corporation | Jan 31, 1978 | Active |
| NUTMEG FOREST PRODUCTS, INC.Fairfield, CT · Active | Fairfield, CT | Corporation | May 8, 1978 | Active |
| DAMMERMAN CONDOMINIUM ASSOCIATION, INC.Fairfield, CT · Active | Fairfield, CT | Corporation | Jul 19, 1978 | Active |
| CIRCLE COLLISION, INC.Fairfield, CT · Active | Fairfield, CT | Corporation | Sep 28, 1978 | Active |
| FKI INDUSTRIES INC.Fairfield, CT · Revoked | Fairfield, CT | Corporation | Mar 13, 1914 | Revoked |
| SUNRISE CONDOMINIUM ASSOCIATION, INC.Fairfield, CT · Active | Fairfield, CT | Corporation | Nov 30, 1978 | Active |
| SWAN LASER DIE CO. THEFairfield, CT · Dissolved | Fairfield, CT | Corporation | Feb 6, 1970 | Dissolved |
| FAIRFIELD DERMATOLOGY, P.C.Fairfield, CT · Active | Fairfield, CT | Corporation | Dec 21, 1978 | Active |
| VICTORIA E. BLANK, M.D., P.C.Fairfield, CT · Dissolved | Fairfield, CT | Corporation | Jan 16, 1979 | Dissolved |
| CITIZENS AUTO BODY, INC.Fairfield, CT · Active | Fairfield, CT | Corporation | Apr 29, 1975 | Active |
| CYRIL WAYNIK, M.D., P.C.Fairfield, CT · Active | Fairfield, CT | Corporation | Sep 2, 1969 | Active |
| SUMMIT WOMEN'S CENTER, INC.Milford, CT · Dissolved | Milford, CT | Corporation | Jun 6, 1974 | Dissolved |
| CHIEF'S USED BRICK INC.Fairfield, CT · Forfeited | Fairfield, CT | Corporation | Apr 23, 1979 | Forfeited |
| PHOENIX TECHNOLOGY PARTNERS INC.Fairfield, CT · Dissolved | Fairfield, CT | Corporation | Jun 28, 1979 | Dissolved |
| OPTIMA GROUP, INC.Fairfield, CT · Active | Fairfield, CT | Corporation | Aug 20, 1979 | Active |