| LYME LAND CONSERVATION TRUST, INC.Lyme, CT · Active | Lyme, CT | Corporation | Oct 3, 1966 | Active |
| LYME POST #41, AMERICAN LEGION, INCORPORATEDOld Lyme, CT · Forfeited | Old Lyme, CT | Corporation | Apr 28, 1949 | Forfeited |
| LYME PUBLIC LIBRARY FOUNDATION, INC.Lyme, CT · Active | Lyme, CT | Corporation | Mar 13, 1972 | Active |
| LYME REGIS, INC.Old Lyme, CT · Active | Old Lyme, CT | Corporation | Aug 24, 1973 | Active |
| LYME SANDY BEACH ASSOCIATION, INC.Lyme, CT · Active | Lyme, CT | Corporation | May 21, 1964 | Active |
| MILE CREEK CLUB, INCORPORATED, THEOld Lyme, CT · Active | Old Lyme, CT | Corporation | Aug 21, 1947 | Active |
| OAK RIDGE FOREST CORPORATIONOld Lyme, CT · Active | Old Lyme, CT | Corporation | May 11, 1976 | Active |
| OAK TREE BEACH ASSOCIATION, INC.Lyme, CT · Active | Lyme, CT | Corporation | Aug 12, 1968 | Active |
| OLD LYME LAND TRUST, INC.Old Lyme, CT · Active | Old Lyme, CT | Corporation | Sep 29, 1966 | Active |
| OLD LYME COUNTRY CLUB, INCORPORATEDOld Lyme, CT · Active | Old Lyme, CT | Corporation | Nov 20, 1923 | Active |
| OLD LYME FIRE DEPARTMENT INCORPORATEDOld Lyme, CT · Active | Old Lyme, CT | Corporation | Jan 22, 1975 | Active |
| THE OLD LYME GRANGE NO. 162 P. OF H. INCORPORATEDOld Lyme, CT · Dissolved | Old Lyme, CT | Corporation | Sep 16, 1948 | Dissolved |
| POTAPAUG GUN CLUB, INCORPORATEDOldlyme, CT · Active | Oldlyme, CT | Corporation | Oct 18, 1929 | Active |
| PYTHAGORAS REALTY INCORPORATED, THEOld Lyme, CT · Forfeited | Old Lyme, CT | Corporation | Aug 12, 1959 | Forfeited |
| NUTMEG WEIMARANER CLUB, INC.Lyme, CT · Forfeited | Lyme, CT | Corporation | May 26, 1971 | Forfeited |
| MCGARRY, PRINCE, MCGARRY P.C.Old Lyme, CT · Active | Old Lyme, CT | Corporation | Dec 30, 1977 | Active |
| GULL ASSOCIATES, INC.Old Lyme, CT · Active | Old Lyme, CT | Corporation | Jan 23, 1978 | Active |
| RESTAURANT EQUIPMENT & SUPPLY CORP.Old Lyme, CT · Dissolved | Old Lyme, CT | Corporation | Jan 30, 1978 | Dissolved |
| ALL-PRO TIRE, INC.Old Lyme, CT · Active | Old Lyme, CT | Corporation | Mar 29, 1978 | Active |
| LORD BYRON, INC.Old Lyme, CT · Dissolved | Old Lyme, CT | Corporation | Jun 9, 1978 | Dissolved |
| REAL ESTATE SERVICE OF CONN., INC.Old Lyme, CT · Active | Old Lyme, CT | Corporation | Jun 16, 1978 | Active |
| IN STITCHES OF LYME STREET, INC.Old Lyme, CT · Dissolved | Old Lyme, CT | Corporation | Jul 5, 1978 | Dissolved |
| HIGH HOPES THERAPEUTIC RIDING, INC.Old Lyme, CT · Active | Old Lyme, CT | Corporation | Jul 6, 1978 | Active |
| OLD LYME MARINA, INC.Old Lyme, CT · Active | Old Lyme, CT | Corporation | Mar 18, 1968 | Active |
| NOANK-MYSTIC COMMUNITY BAND, INC. THEOld Lyme, CT · Active | Old Lyme, CT | Corporation | Nov 13, 1978 | Active |
| LYMES ELDERLY HOUSING, INCORPORATEDOld Lyme, CT · Active | Old Lyme, CT | Corporation | Jan 3, 1979 | Active |
| RESTAURANT CONSULTANTS, INC.Old Lyme, CT · Active | Old Lyme, CT | Corporation | Jan 26, 1979 | Active |
| MANESWOOD HOMEOWNERS' ASSOCIATION, INC.Old Lyme, CT · Active | Old Lyme, CT | Corporation | May 4, 1977 | Active |
| COVE LANDING MARINE, INC.Lyme, CT · Active | Lyme, CT | Corporation | Feb 23, 1979 | Active |
| ROCK RIVER HOMEOWNERS ASSOCIATION, INC.Old Lyme, CT · Active | Old Lyme, CT | Corporation | Aug 27, 1979 | Active |
| BRADFORD ADVERTISING, INC.Lyme, CT · Dissolved | Lyme, CT | Corporation | Sep 14, 1979 | Dissolved |
| ACADEMY OF DRIVING INC.Old Lyme, CT · Active | Old Lyme, CT | Corporation | Oct 10, 1979 | Active |
| KEN MARINO SALES & SERVICE, LTD.Old Lyme, CT · Dissolved | Old Lyme, CT | Corporation | Oct 29, 1979 | Dissolved |
| FLORENCE GRISWOLD MUSEUM, INC.Old Lyme, CT · Active | Old Lyme, CT | Corporation | Jul 16, 1936 | Active |
| OLD LYME-PHOEBE GRIFFIN NOYES LIBRARY ASSOCIATION, INC. THEOld Lyme, CT · Active | Old Lyme, CT | Corporation | Sep 22, 1971 | Active |
| ORGANIZATION DIAGNOSTICS, INC.Lyme, CT · Forfeited | Lyme, CT | Corporation | Jan 7, 1980 | Forfeited |
| LEONARDO & ASSOCIATES, P.C.Old Lyme, CT · Active | Old Lyme, CT | Corporation | Mar 31, 1980 | Active |
| MACCURDY-SALISBURY EDUCATIONAL FOUNDATION, INCORPORATEDOld Lyme, CT · Active | Old Lyme, CT | Corporation | Nov 15, 1893 | Active |
| SOUND VIEW BEACH ASSOCIATION, INC.Old Lyme, CT · Active | Old Lyme, CT | Corporation | Jun 12, 1980 | Active |
| LYME-OLD LYME LIONS CLUB, INC.Old Lyme, CT · Active | Old Lyme, CT | Corporation | Sep 5, 1980 | Active |
| LIEUTENANT RIVER HOMEOWNERS ASSOCIATION, INC.Old Lyme, CT · Active | Old Lyme, CT | Corporation | Oct 28, 1980 | Active |
| OLD LYME SOUTH END VOLUNTEER AMBULANCE ASSOCIATION, INC.Old Lyme, CT · Active | Old Lyme, CT | Corporation | Nov 4, 1980 | Active |
| LYMES' YOUTH SERVICE BUREAU, INC.Old Lyme, CT · Active | Old Lyme, CT | Corporation | Feb 5, 1981 | Active |
| JOSHUA TOWN PUBLISHING ASSOCIATES INC.Lyme, CT · Dissolved | Lyme, CT | Corporation | Apr 27, 1981 | Dissolved |
| SOFTWARE HOUSE, INC. THEOld Lyme, CT · Dissolved | Old Lyme, CT | Corporation | Apr 28, 1981 | Dissolved |
| ARCHAEOLOGICAL SOCIETY OF SOUTHEASTERN CONNECTICUT, INC. THEOld Lyme, CT · Forfeited | Old Lyme, CT | Corporation | May 15, 1981 | Forfeited |
| SOUTHWICK FOUNDATION, INC.Old Lyme, CT · Dissolved | Old Lyme, CT | Corporation | Aug 17, 1981 | Dissolved |
| OLD LYME PIZZA PALACE, INCORPORATEDOld Lyme, CT · Active | Old Lyme, CT | Corporation | Aug 20, 1981 | Active |
| COVE ROAD ASSOCIATION, INC.Lyme, CT · Forfeited | Lyme, CT | Corporation | Sep 8, 1981 | Forfeited |
| KUNK, INC.Old Lyme, CT · Dissolved | Old Lyme, CT | Corporation | Sep 29, 1981 | Dissolved |