| GRADUATE-PROFESSIONAL STUDENT SENATE, INC.New Haven, CT · Active | New Haven, CT | Corporation | Feb 8, 1971 | Active |
| GREATER NEW HAVEN BUSINESS AND PROFESSIONAL'S ASSOCIATION, INC.New Haven, CT · Active | New Haven, CT | Corporation | Jun 23, 1966 | Active |
| HARRIS AND TUCKER SCHOOL INCORPORATEDHamden, CT · Active | Hamden, CT | Corporation | Feb 23, 1976 | Active |
| HUMAN RELATIONS AREA FILES, INCORPORATEDNew Haven, CT · Active | New Haven, CT | Corporation | Mar 3, 1949 | Active |
| KNIGHTS OF ST. PATRICK, INCORPORATED, THENew Haven, CT · Active | New Haven, CT | Corporation | Dec 17, 1971 | Active |
| MELEBUS CLUB INCORPORATED, THENew Haven, CT · Dissolved | New Haven, CT | Corporation | Dec 13, 1955 | Dissolved |
| MERMIN DECAGON, INC., THENew Haven, CT · Active | New Haven, CT | Corporation | Aug 26, 1975 | Active |
| MORY'S ASSOCIATION,INCORPORATED, THENew Haven, CT · Active | New Haven, CT | Corporation | Nov 6, 1912 | Active |
| CONNECTICUT AFRO-AMERICAN HISTORICAL SOCIETY, INC. THENew Haven, CT · Forfeited | New Haven, CT | Corporation | Feb 7, 1972 | Forfeited |
| NEW HAVEN DENTAL ASSOCIATION INCORPORATED THENew Haven, CT · Active | New Haven, CT | Corporation | Oct 18, 1906 | Active |
| NEW HAVEN DISTRICT CLUB OF PRINTING HOUSE CRAFTMEN, INCORPORATED, THENew Haven, CT · Dissolved | New Haven, CT | Corporation | Jun 13, 1960 | Dissolved |
| NEW HAVEN LAWN CLUB ASSOCIATIONNew Haven, CT · Active | New Haven, CT | Corporation | Mar 6, 1891 | Active |
| NEW HAVEN MIKVA SOCIETY, INCORPORATED, THENew Haven, CT · Active | New Haven, CT | Corporation | Apr 20, 1937 | Active |
| NEW HAVEN PRESERVATION TRUST, INCORPORATED, THENew Haven, CT · Active | New Haven, CT | Corporation | Aug 10, 1961 | Active |
| PROJECT MODEL OFFENDER REINTEGRATION EXPERIENCE, INC.New Haven, CT · Active | New Haven, CT | Corporation | Jul 1, 1976 | Active |
| PROMOTING ENDURING PEACE INCORPORATED, THENew Haven, CT · Dissolved | New Haven, CT | Corporation | Mar 13, 1958 | Dissolved |
| ROCHDALE ASSOCIATION, INC.New Haven, CT · Active | New Haven, CT | Corporation | Jun 12, 1964 | Active |
| ST. ELMO SOCIETY, INCORPORATEDNew Haven, CT · Active | New Haven, CT | Corporation | Jul 2, 1964 | Active |
| ST. THOMAS'S DAY SCHOOL, INC.New Haven, CT · Active | New Haven, CT | Corporation | Sep 22, 1958 | Active |
| NEW HAVEN PUBLIC SCHOOL FOUNDATION, INC.New Haven, CT · Dissolved | New Haven, CT | Corporation | Jun 25, 1969 | Dissolved |
| SEABURY COOPERATIVE HOUSING, INC.New Haven, CT · Active | New Haven, CT | Corporation | Jun 20, 1974 | Active |
| SHORELINE DENTAL SOCIETY OF CONNECTICUT, INC., THENew Haven, CT · Active | New Haven, CT | Corporation | Mar 7, 1974 | Active |
| SOCIETA' ST. MARIA MADDALENA DI MUTUO SOCCORSO ATRANESE OF NEW HAVEN, CONNECTICUT, INCORPORATEDNew Haven, CT · Active | New Haven, CT | Corporation | Apr 7, 1905 | Active |
| TEACHER CENTER, INC., THENew Haven, CT · Dissolved | New Haven, CT | Corporation | Feb 7, 1972 | Dissolved |
| THE CONSULTATION CENTER, INC.New Haven, CT · Active | New Haven, CT | Corporation | May 15, 1974 | Active |
| WOMEN'S HEALTH SERVICES, INC.New Haven, CT · Dissolved | New Haven, CT | Corporation | Dec 7, 1973 | Dissolved |
| YALE DAILY NEWS PUBLISHING CO., INC.New Haven, CT · Active | New Haven, CT | Corporation | Dec 6, 1973 | Active |
| YALE INTERNATIONAL RELATIONS, INC.New Haven, CT · Active | New Haven, CT | Corporation | Oct 21, 1974 | Active |
| THE YALE LAW JOURNAL COMPANY, INCORPORATEDNew Haven, CT · Active | New Haven, CT | Corporation | Nov 6, 1914 | Active |
| YALE SCIENTIFIC PUBLICATIONS, INC.New Haven, CT · Forfeited | New Haven, CT | Corporation | Sep 18, 1975 | Forfeited |
| YALE UNIVERSITY ELIZABETHAN CLUB CORPORATIONNew Haven, CT · Active | New Haven, CT | Corporation | Jun 15, 1911 | Active |
| DWIGHT HALL AT YALENew Haven, CT · Active | New Haven, CT | Corporation | Apr 13, 1898 | Active |
| CIVIC ORCHESTRA OF NEW HAVEN, INCORPORATEDNew Haven, CT · Active | New Haven, CT | Corporation | Oct 11, 1961 | Active |
| THE INTERNATIONAL ASSOCIATION OF NEW HAVEN, INC.New Haven, CT · Active | New Haven, CT | Corporation | Jun 23, 1955 | Active |
| NEW HAVEN CARDINALS, INC.New Haven, CT · Forfeited | New Haven, CT | Corporation | Jan 18, 1971 | Forfeited |
| JOSEPH SLIFKA CENTER FOR JEWISH LIFE AT YALE, INC.New Haven, CT · Active | New Haven, CT | Corporation | May 21, 1951 | Active |
| ULYSSES S. GRANT FOUNDATION, INCORPORATED THENew Haven, CT · Active | New Haven, CT | Corporation | Mar 27, 1953 | Active |
| KAVCO, INC.New Haven, CT · Forfeited | New Haven, CT | Corporation | Dec 8, 1977 | Forfeited |
| YESHIVA OF NEW HAVEN, INC.New Haven, CT · Active | New Haven, CT | Corporation | Dec 28, 1977 | Active |
| GLOBE KNUDSEN CORPORATIONNew Haven, CT · Dissolved | New Haven, CT | Corporation | Dec 29, 1977 | Dissolved |
| SAWCO, INC.New Haven, CT · Dissolved | New Haven, CT | Corporation | Mar 27, 1926 | Dissolved |
| NAPLES PIZZA, INC.New Haven, CT · Dissolved | New Haven, CT | Corporation | Feb 15, 1978 | Dissolved |
| TORO & PINCIARO, P.C.New Haven, CT · Active | New Haven, CT | Corporation | Nov 1, 1977 | Active |
| ST. FRANCIS HOME FOR CHILDREN, INC.New Haven, CT · Dissolved | New Haven, CT | Other | Not reported | Dissolved |
| CONTINENTAL AUTO RESOURCE SYSTEMS, INC.New Haven, CT · Forfeited | New Haven, CT | Corporation | Apr 10, 1978 | Forfeited |
| U-HAUL CO. OF CONNECTICUTNew Haven, CT · Active | New Haven, CT | Corporation | Mar 19, 1970 | Active |
| FRANK PEPE PIZZERIA NAPOLETANA, INC.New Haven, CT · Dissolved | New Haven, CT | Corporation | May 19, 1978 | Dissolved |
| NEW HAVEN ZEN CENTER, INCORPORATEDNew Haven, CT · Active | New Haven, CT | Corporation | Jun 1, 1978 | Active |
| HILLTOP ACRES, INC.New Haven, CT · Active | New Haven, CT | Corporation | Jun 15, 1978 | Active |
| ALLIANCE THEATRE, INC. THENew Haven, CT · Forfeited | New Haven, CT | Corporation | Jun 15, 1978 | Forfeited |