| THE WOODWAY COUNTRY CLUB, INCORPORATEDDarien, CT · Active | Darien, CT | Corporation | Aug 8, 1916 | Active |
| OX RIDGE RIDING & RACQUET CLUB, INC.Darien, CT · Active | Darien, CT | Corporation | Apr 7, 1914 | Active |
| CHILDREN'S AID, INC.Darien, CT · Forfeited | Darien, CT | Corporation | Aug 1, 1975 | Forfeited |
| DARIEN BOAT CLUB, INCORPORATEDDarien, CT · Active | Darien, CT | Corporation | May 28, 1948 | Active |
| DARIEN BOOK AID PLAN, INCORPORATED,THEDarien, CT · Active | Darien, CT | Corporation | May 19, 1952 | Active |
| DARIEN CHAMBER OF COMMERCE, INCORPORATEDDarien, CT · Active | Darien, CT | Corporation | Mar 22, 1957 | Active |
| DARIEN COMMUNITY YOUNG MEN'S CHRISTIAN ASSOCIATION, INC., THEDarien, CT · Active | Darien, CT | Corporation | Jan 29, 1970 | Active |
| DARIEN FIRE DEPARTMENT INCORPORATED, THEDarien, CT · Active | Darien, CT | Corporation | Oct 14, 1914 | Active |
| DARIEN HISTORICAL SOCIETY, INCORPORATED, THEDarien, CT · Active | Darien, CT | Corporation | Dec 15, 1953 | Active |
| DARIEN POLICE ASSOCIATION INCORPORATEDDarien, CT · Active | Darien, CT | Corporation | Jun 25, 1962 | Active |
| THE DARIEN SAIL AND POWER SQUADRON, INCORPORATEDDarien, CT · Active | Darien, CT | Corporation | Jun 19, 1958 | Active |
| THE DARIEN TAXPAYERS ASSOC., INC.Darien, CT · Forfeited | Darien, CT | Corporation | Aug 30, 1976 | Forfeited |
| FRIENDS OF TILLEY PARK, INCORPORATED, THEDarien, CT · Dissolved | Darien, CT | Corporation | Dec 2, 1975 | Dissolved |
| CAPTAIN THOMAS O'CONNOR FOUNDATION OF THE KIWANIS CLUB OF DARIEN, INC., THEDarien, CT · Forfeited | Darien, CT | Corporation | Jul 23, 1970 | Forfeited |
| DARIEN ROTARY FOUNDATION, INCORPORATEDDarien, CT · Active | Darien, CT | Corporation | Dec 29, 1966 | Active |
| GREENLEAF-WINDSOR ROAD ASSOCIATION, INC.Darien, CT · Active | Darien, CT | Corporation | Aug 22, 1960 | Active |
| HOMESTEAD ROAD PROPERTY OWNERS ASSOCIATION, INC.Darien, CT · Active | Darien, CT | Corporation | Jan 21, 1953 | Active |
| LEWIS H. NASH FAMILY, INCORPORATED, THEDarien, CT · Active | Darien, CT | Corporation | Jul 2, 1923 | Active |
| LIONS CLUB OF DARIEN, INCORPORATEDDarien, CT · Active | Darien, CT | Corporation | Dec 13, 1957 | Active |
| LONG NECK POINT OWNERS ASSOCIATION, INC.Darien, CT · Active | Darien, CT | Corporation | Jul 6, 1976 | Active |
| MAPLE BROOK ASSOCIATES, INC.Darien, CT · Active | Darien, CT | Corporation | Jun 14, 1974 | Active |
| MARIANNE ROAD, INC.Darien, CT · Active | Darien, CT | Corporation | Apr 20, 1954 | Active |
| THE MASONIC CLUB OF DARIEN, INC.Darien, CT · Active | Darien, CT | Corporation | Mar 14, 1929 | Active |
| NOROTON BAY PROPERTY OWNERS, INCORPORATED, THEDarien, CT · Active | Darien, CT | Corporation | Mar 21, 1955 | Active |
| OLD TIMERS ATHLETIC ASSOCIATION OF DARIEN, CONNECTICUT, INC., THEDarien, CT · Active | Darien, CT | Corporation | Jul 6, 1961 | Active |
| ROCATON, INCORPORATEDDarien, CT · Active | Darien, CT | Corporation | Aug 21, 1952 | Active |
| ROCK LEDGE INSTITUTE, INCORPORATED THEDarien, CT · Active | Darien, CT | Corporation | Aug 21, 1944 | Active |
| SEAGATE ASSOCIATION INCORPORATED, THEDarien, CT · Active | Darien, CT | Corporation | Apr 15, 1947 | Active |
| SAC, Inc.Darien, CT · Merged | Darien, CT | Corporation | Feb 27, 1952 | Merged |
| TANGLEWOOD TRAIL, INC.Darien, CT · Forfeited | Darien, CT | Corporation | Mar 6, 1961 | Forfeited |
| TOKENEKE ASSOCIATION INCORPORATED, THEDarien, CT · Active | Darien, CT | Corporation | Aug 23, 1929 | Active |
| TOKENEKE CLUB INCORPORATEDDarien, CT · Active | Darien, CT | Corporation | Sep 10, 1907 | Active |
| WEST HOLLY ASSOCIATION, INCORPORATED, THEDarien, CT · Active | Darien, CT | Corporation | Aug 7, 1958 | Active |
| YOUNG WOMEN'S CHRISTIAN ASSOCIATION OF DARIEN-NORWALK, INC.Darien, CT · Active | Darien, CT | Corporation | Dec 29, 1975 | Active |
| DARIEN LIBRARY, INC. THEDarien, CT · Active | Darien, CT | Corporation | Aug 27, 1901 | Active |
| THE COMMUNITY FUND OF DARIEN, INC.Darien, CT · Active | Darien, CT | Corporation | Feb 28, 1967 | Active |
| FAIRFIELD COUNTY CHAPTER OF THE SOCIETY OF FINANCIAL SERVICES PROFESSIONALS, INC.Darien, CT · Forfeited | Darien, CT | Corporation | Apr 21, 1972 | Forfeited |
| MIDDLESEX CLUB, INC. THEDarien, CT · Active | Darien, CT | Corporation | Jan 2, 1963 | Active |
| PIEDMONT ASSOCIATES, INCORPORATEDDarien, CT · Active | Darien, CT | Corporation | Aug 2, 1916 | Active |
| ROGERS PAINTING COMPANYDarien, CT · Dissolved | Darien, CT | Corporation | Dec 1, 1977 | Dissolved |
| TOPS MFG. CO., INC.Darien, CT · Dissolved | Darien, CT | Corporation | Nov 16, 1977 | Dissolved |
| BANCAM ASSOCIATES, INC.Darien, CT · Dissolved | Darien, CT | Corporation | Jan 3, 1978 | Dissolved |
| FRIENDS OF ANIMALS, INC.Darien, CT · Active | Darien, CT | Corporation | Feb 24, 1978 | Active |
| PIERCE REAL ESTATE, INC.Darien, CT · Active | Darien, CT | Corporation | Jan 26, 1978 | Active |
| THE SCHUBERT CLUB OF FAIRFIELD COUNTY, INC.Darien, CT · Active | Darien, CT | Corporation | Mar 6, 1924 | Active |
| DARIEN HIGH SCHOOL BOOSTER CLUB INCORPORATEDDarien, CT · Dissolved | Darien, CT | Corporation | Sep 14, 1978 | Dissolved |
| COTTAGE INDUSTRIES, INC.Darien, CT · Dissolved | Darien, CT | Corporation | Sep 22, 1978 | Dissolved |
| FRIENDS OF WOODLAND PARK, INCORPORATED THEDarien, CT · Active | Darien, CT | Corporation | Nov 6, 1978 | Active |
| DARIEN COMMUNITY HOMES, INC.Darien, CT · Forfeited | Darien, CT | Corporation | Dec 4, 1978 | Forfeited |
| GRIEB'S DARIEN PHARMACY,INCORPORATEDDarien, CT · Active | Darien, CT | Corporation | Nov 20, 1947 | Active |