| AMERICAN DISTILLING INC.East Hampton, CT · Active | East Hampton, CT | Corporation | Feb 14, 1951 | Active |
| BEVIN BROS. MANUFACTURING COMPANYEast Hampton, CT · Active | East Hampton, CT | Corporation | Apr 22, 1868 | Active |
| BRIAN "BUD" BROOKS & ASSOCIATES, INC.East Hampton, CT · Dissolved | East Hampton, CT | Corporation | Aug 25, 1975 | Dissolved |
| CARPENTER-HAYES PAPER BOX COMPANY, INCORPORATED THEEast Hampton, CT · Dissolved | East Hampton, CT | Corporation | Oct 5, 1943 | Dissolved |
| FOWLER'S AUTO WRECKING, INCORPORATEDEast Hampton, CT · Active | East Hampton, CT | Corporation | Nov 21, 1960 | Active |
| HADDAM NECK FAIR ASSOCIATION INCORPORATED THEHaddam Neck, CT · Active | Haddam Neck, CT | Corporation | Nov 19, 1924 | Active |
| HEIDELBERG INN, INC.E. Hampton, CT · Dissolved | E. Hampton, CT | Corporation | Mar 11, 1957 | Dissolved |
| J.C. PRODUCTS, INC.East Hampton, CT · Dissolved | East Hampton, CT | Corporation | Nov 9, 1953 | Dissolved |
| J.E. MCKENNA COMPANY, INC.East Hampton, CT · Dissolved | East Hampton, CT | Corporation | Oct 25, 1974 | Dissolved |
| POST & BEAM HOMES, INC.East Hampton, CT · Dissolved | East Hampton, CT | Corporation | Jul 15, 1976 | Dissolved |
| NAUTA ROLL CORPORATIONEast Hampton, CT · Forfeited | East Hampton, CT | Corporation | Aug 26, 1971 | Forfeited |
| NESCI ENTERPRISES, INC.East Hampton, CT · Active | East Hampton, CT | Corporation | Dec 30, 1965 | Active |
| NEW ENGLAND FILING SUPPLY CO., INC.East Hampton, CT · Dissolved | East Hampton, CT | Corporation | Mar 1, 1960 | Dissolved |
| NICHOLS BUS SERVICE, INC.East Hampton, CT · Dissolved | East Hampton, CT | Corporation | Jul 28, 1967 | Dissolved |
| NOSLEN, INC.E. Hampton, CT · Dissolved | E. Hampton, CT | Corporation | Jun 26, 1972 | Dissolved |
| PETLYN, INC.East Hampton, CT · Dissolved | East Hampton, CT | Corporation | Apr 5, 1976 | Dissolved |
| POCOTOPAGUE WATER POWER COMPANYEast Hampton, CT · Active | East Hampton, CT | Corporation | Jan 10, 1900 | Active |
| EAST HARTFORD POWER EQUIPMENT, INC.East Hampton, CT · Dissolved | East Hampton, CT | Corporation | Dec 20, 1965 | Dissolved |
| T. N. DICKINSON COMPANY, THEEast Hampton, CT · Dissolved | East Hampton, CT | Corporation | Nov 3, 1952 | Dissolved |
| T.S. BROWN INSURANCE AGENCY INCORPORATED, THEEast Hampton, CT · Dissolved | East Hampton, CT | Corporation | May 27, 1929 | Dissolved |
| TRI MAC, INC.East Hampton, CT · Dissolved | East Hampton, CT | Corporation | Apr 1, 1974 | Dissolved |
| BAY POINT CLUB INC.East Hampton, CT · Active | East Hampton, CT | Corporation | Jul 9, 1974 | Active |
| BEACH ROAD ASSOCIATION INCORPORATED, THEEast Hampton, CT · Active | East Hampton, CT | Corporation | Nov 12, 1959 | Active |
| BOSTON TERRIER CLUB OF CONNECTICUT, INCORPORATEDEast Hampton, CT · Active | East Hampton, CT | Corporation | Oct 11, 1933 | Active |
| BROOKHAVEN PARK, INCORPORATEDEast Hampton, CT · Active | East Hampton, CT | Corporation | Jun 23, 1950 | Active |
| CAMP CONNECTICUT, INDEPENDENT ORDER OF ODD FELLOWS AND REBEKAHS, INC.East Hampton, CT · Active | East Hampton, CT | Corporation | Dec 14, 1967 | Active |
| CHATHAM HISTORICAL SOCIETY, INC., THEEast Hampton, CT · Active | East Hampton, CT | Corporation | Jul 18, 1963 | Active |
| CONNECTICUT STATE TRACTOR PULLERS ASSOCIATION, INC.East Hampton, CT · Forfeited | East Hampton, CT | Corporation | Apr 15, 1974 | Forfeited |
| EAST HAMPTON AMBULANCE ASSOCIATION INC.East Hampton, CT · Active | East Hampton, CT | Corporation | Jun 30, 1953 | Active |
| EAST HAMPTON LITTLE LEAGUE BASEBALL, INCORPORATED, THEEast Hampton, CT · Active | East Hampton, CT | Corporation | Mar 9, 1959 | Active |
| EAST HAMPTON NURSERY SCHOOL, INC.East Hampton, CT · Active | East Hampton, CT | Corporation | Feb 28, 1968 | Active |
| FOWLER-DIX-PARK POST NO.5095 VETERANS OF FOREIGN WARS OF THE UNITED STATES INCORPORATEDEast Hampton, CT · Active | East Hampton, CT | Corporation | Jan 26, 1949 | Active |
| HARTFORD LIEDERKRANZ INCORPORATED, THEEast Hampton, CT · Active | East Hampton, CT | Corporation | Feb 9, 1914 | Active |
| ISLAND VIEW CORPORATIONEast Hampton, CT · Active | East Hampton, CT | Corporation | Jun 29, 1970 | Active |
| MASONIC TEMPLE ASSOCIATION OF EAST HAMPTON, CONNECTICUT, INCORPORATEDEast Hampton, CT · Active | East Hampton, CT | Corporation | Apr 11, 1947 | Active |
| 1971 O'NEILL CAMP, INCORPORATEDEast Hampton, CT · Dissolved | East Hampton, CT | Corporation | Mar 25, 1971 | Dissolved |
| OUR FATHER CHURCH, INC., THEEast Hampton, CT · Dissolved | East Hampton, CT | Corporation | Oct 26, 1976 | Dissolved |
| POCOTOPAUG COMMUNITY CORPORATION THEEast Hampton, CT · Dissolved | East Hampton, CT | Corporation | Jul 28, 1925 | Dissolved |
| THE PRINCESS POCOTOPAUG ASSOCIATION, INCORPORATEDE. Hampton, CT · Active | E. Hampton, CT | Corporation | Oct 9, 1953 | Active |
| THETA ELDERS ASSOCIATION, INC.East Hampton, CT · Active | East Hampton, CT | Corporation | Aug 15, 1972 | Active |
| TREADWAY CAVANAUGH POST #64 AMERICAN LEGION, DEPT OF CONNECTICUT, INCORPORATEDEast Hampton, CT · Forfeited | East Hampton, CT | Corporation | Jul 28, 1933 | Forfeited |
| ESR ENTERPRISES, INC.East Hampton, CT · Dissolved | East Hampton, CT | Corporation | Jul 16, 1979 | Dissolved |
| EAST HAMPTON OLD HOME DAY ASSOCIATION, INC. THEEast Hampton, CT · Active | East Hampton, CT | Corporation | Jul 7, 1980 | Active |
| G & S SERVICE, INC.East Hampton, CT · Forfeited | East Hampton, CT | Corporation | Jul 7, 1980 | Forfeited |
| EDGEMERE CONDOMINIUM ASSOCIATION, INC.East Hampton, CT · Active | East Hampton, CT | Corporation | Aug 25, 1980 | Active |
| KAHN INDUSTRIES, INC.East Hampton, CT · Active | East Hampton, CT | Corporation | Nov 7, 1980 | Active |
| TOLLIS PLUMBING & HEATING, INC.Marlborough, CT · Dissolved | Marlborough, CT | Corporation | Dec 12, 1980 | Dissolved |
| H2O EQUIPMENT COMPANY, INC.East Hampton, CT · Active | East Hampton, CT | Corporation | Feb 3, 1981 | Active |
| CARLSON WELDING, INC.East Hampton, CT · Dissolved | East Hampton, CT | Corporation | Feb 11, 1981 | Dissolved |
| PROFESSIONAL ELECTRIC CORPORATIONEast Hampton, CT · Active | East Hampton, CT | Corporation | Feb 19, 1981 | Active |