| COTTAGE LANE HOME OWNERS ASSOCIATION, INC.Westport, CT · Active | Westport, CT | Corporation | Jun 24, 1958 | Active |
| COVLEE COMPANY, THEWestport, CT · Active | Westport, CT | Corporation | Aug 25, 1953 | Active |
| Westport Downtown Association Inc.Westport, CT · Active | Westport, CT | Corporation | Mar 5, 1976 | Active |
| DRIFTWOOD POINT ASSOCIATION, INC., THEWestport, CT · Active | Westport, CT | Corporation | Jan 20, 1972 | Active |
| FAIRFIELD BRIDLE TRAILS ASSOCIATION, INC., THEWestport, CT · Active | Westport, CT | Corporation | Mar 17, 1966 | Active |
| FAIRFIELD COUNTY CHORALE, INC.Westport, CT · Active | Westport, CT | Corporation | Jul 1, 1965 | Active |
| FRIENDS OF THE LEVITT PAVILION, INC.Westport, CT · Active | Westport, CT | Corporation | Jul 25, 1975 | Active |
| WESTPORT COUNTRY PLAYHOUSE, INC.Westport, CT · Active | Westport, CT | Corporation | Jun 20, 1973 | Active |
| THE HARMAN FAMILY FOUNDATION, INC.Westport, CT · Forfeited | Westport, CT | Corporation | May 26, 1966 | Forfeited |
| HUMAN LACTATION CENTER, LTD., THEWestport, CT · Dissolved | Westport, CT | Corporation | Dec 18, 1974 | Dissolved |
| JOSEPH J. CLINTON POST, #399, VETERANS OF FOREIGN WARS OF THE UNITED STATES, INCORPORATED, THEWestport, CT · Active | Westport, CT | Corporation | Apr 1, 1949 | Active |
| KIWANIS CLUB OF WESTPORT, CONNECTICUT, INC.Westport, CT · Forfeited | Westport, CT | Corporation | Dec 29, 1971 | Forfeited |
| MARION ROAD ASSOCIATION, INC., THEWestport, CT · Active | Westport, CT | Corporation | May 9, 1963 | Active |
| EARTHPLACE, INC.Westport, CT · Active | Westport, CT | Corporation | Jun 19, 1958 | Active |
| MINUTEMAN YACHT CLUB, INC.Westport, CT · Active | Westport, CT | Corporation | Oct 31, 1967 | Active |
| OAK RIDGE PARK ASSOCIATION, INC.Westport, CT · Forfeited | Westport, CT | Corporation | Feb 8, 1957 | Forfeited |
| OWENOKE ASSOCIATION INCORPORATEDWestport, CT · Active | Westport, CT | Corporation | Aug 17, 1928 | Active |
| CONNECTICUT ALLIANCE FOR MUSIC, INC.Westport, CT · Dissolved | Westport, CT | Corporation | Feb 20, 1973 | Dissolved |
| ROBIN HILL ROAD ASSOCIATION, INCORPORATED, THEWestport, CT · Active | Westport, CT | Corporation | Oct 5, 1960 | Active |
| SAUGATUCK HARBOR YACHT CLUB, INC.Westport, CT · Active | Westport, CT | Corporation | Dec 30, 1958 | Active |
| SAUGATUCK SHORES CLUB, INCORPORATEDWestport, CT · Active | Westport, CT | Corporation | Jun 23, 1948 | Active |
| STAPLES HIGH SCHOOL TUITION GRANTS COMMITTEE, INC.Westport, CT · Active | Westport, CT | Corporation | Aug 14, 1975 | Active |
| STONY POINT ASSOCIATION, INC., THEWestport, CT · Active | Westport, CT | Corporation | Jun 24, 1960 | Active |
| TEMENOS INSTITUTE, INC.Westport, CT · Dissolved | Westport, CT | Corporation | Aug 26, 1976 | Dissolved |
| TRUSTEES OF TEMPLE LODGE, #65 A. F. & A. M.,INCORPORATEDWestport, CT · Active | Westport, CT | Corporation | Jul 2, 1945 | Active |
| WALTER CAMP FOOTBALL FOUNDATION, INC.West Port, CT · Forfeited | West Port, CT | Corporation | Jan 17, 1977 | Forfeited |
| WESTPORT HISTORICAL SOCIETY INC.Westport, CT · Active | Westport, CT | Corporation | Mar 26, 1973 | Active |
| WESTPORT BASEBALL & SOFTBALL, INC.Westport, CT · Active | Westport, CT | Corporation | Jun 15, 1951 | Active |
| WESTPORT POLICE ATHLETIC LEAGUE, INCORPORATED, THEWestport, CT · Active | Westport, CT | Corporation | Jun 9, 1949 | Active |
| WESTPORT POLICE BENEVOLENT ASSOCIATION, INCORPORATED, THEWestport, CT · Active | Westport, CT | Corporation | Oct 31, 1957 | Active |
| WESTPORT PROFESSIONAL FIRE FIGHTERS ASSOCIATION, INC.Westport, CT · Forfeited | Westport, CT | Corporation | May 7, 1975 | Forfeited |
| WESTPORT SCHOOL OF MUSIC, INCORPORATED, THEWestport, CT · Active | Westport, CT | Corporation | Aug 1, 1957 | Active |
| MOCA CT, Inc.Westport, CT · Active | Westport, CT | Corporation | Jun 2, 1970 | Active |
| WESTPORT WOMAN'S CLUB, INCORPORATED, THEWestport, CT · Active | Westport, CT | Corporation | Dec 1, 1939 | Active |
| WESTPORT YOUNG WOMAN'S LEAGUE, INC. THEWestport, CT · Active | Westport, CT | Corporation | Mar 12, 1957 | Active |
| WHIPPOORWILL LANE ASSOCIATION, INC. THEWestport, CT · Active | Westport, CT | Corporation | Nov 18, 1958 | Active |
| WOODS GROVE ASSOCIATION, INC. THEWestport, CT · Forfeited | Westport, CT | Corporation | Oct 5, 1956 | Forfeited |
| WORKMEN'S CIRCLE EDUCATIONAL CENTER OF BRIDGEPORT INC.Westport, CT · Forfeited | Westport, CT | Corporation | Mar 17, 1930 | Forfeited |
| YOUNG MEN'S CHRISTIAN ASSOCIATION OF WESTPORT/WESTON, CONNECTICUT, INC.Westport, CT · Active | Westport, CT | Corporation | Oct 8, 1919 | Active |
| The Bluewater Hill Association, Inc.Westport, CT · Active | Westport, CT | Corporation | Nov 23, 1951 | Active |
| CONNECTICUT STATE JOURNEYMEN BARBERS, HAIRDRESSERS AND COSMETICIANS, INCORPORATED THEWestport, CT · Dissolved | Westport, CT | Corporation | Dec 21, 1916 | Dissolved |
| GREENS FARMS ACADEMY, INC.Westport, CT · Active | Westport, CT | Corporation | Oct 22, 1957 | Active |
| WESTPORT WESTON CHAMBER OF COMMERCE, INC.Westport, CT · Active | Westport, CT | Corporation | Jul 15, 1953 | Active |
| THE DREW FRIEDMAN COMMUNITY ARTS CENTER, INC.Westport, CT · Active | Westport, CT | Corporation | Nov 10, 1977 | Active |
| LANDWORKS ASSOCIATES INC.Westport, CT · Merged | Westport, CT | Corporation | Sep 7, 1977 | Merged |
| MICHAEL HEINE BUILDERS CORP.Westport, CT · Dissolved | Westport, CT | Corporation | Dec 7, 1977 | Dissolved |
| BLACK DUCK CORPORATIONWestport, CT · Active | Westport, CT | Corporation | Dec 14, 1977 | Active |
| CONTINENTAL COIFFEUR OF NORWALK, INC.Westport, CT · Dissolved | Westport, CT | Corporation | Dec 19, 1977 | Dissolved |
| STUART A. WALTZMAN, M.D., P.C.Westport, CT · Dissolved | Westport, CT | Corporation | Jan 23, 1978 | Dissolved |
| U.S. HOMEFINDERS, INC.Westport, CT · Dissolved | Westport, CT | Corporation | Jan 6, 1978 | Dissolved |