| CHRISTIAN TABERNACLE BAPTIST CHURCH, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Sep 6, 1962 | Active |
| PROMISE LAND CHURCH OF GOD, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Sep 13, 1967 | Active |
| CHURCH ON THE ROCK OF THE APOSTOLIC FAITH, INCORPORATED, THELocation not reported, CT · Dissolved | Location not reported, CT | Other | Aug 13, 1951 | Dissolved |
| EVANGELICAL BAPTIST CHURCH, INC. OF NEW HAVENLocation not reported, CT · Dissolved | Location not reported, CT | Other | Jan 25, 1960 | Dissolved |
| GREEK ORTHODOX CHURCH OF NEW HAVENLocation not reported, CT · Active | Location not reported, CT | Other | Jul 13, 1920 | Active |
| MOUNT BETHEL MISSIONARY BAPTIST CHURCH, THELocation not reported, CT · Active | Location not reported, CT | Corporation | Sep 17, 1957 | Active |
| MOUNT HOPE TEMPLE, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Dec 28, 1973 | Active |
| MOUNT ZION TEMPLE PENTECOSTAL CHURCH OF GOD OF NEW HAVENLocation not reported, CT · Active | Location not reported, CT | Corporation | Jun 22, 1967 | Active |
| NEW HOPE MISSIONARY BAPTIST CHURCH, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jul 16, 1958 | Active |
| ST. JAMES, UNITED AMERICAN FREE WILL BAPTIST CHURCH OF NEW HAVEN, CONNECTICUT, INCORPORATEDLocation not reported, CT · Dissolved | Location not reported, CT | Corporation | Sep 3, 1959 | Dissolved |
| ST. MATTHEW'S FREE WILL BAPTIST CHURCHLocation not reported, CT · Active | Location not reported, CT | Corporation | Feb 25, 1918 | Active |
| ST. PAUL UNION AMERICAN METHODIST EPISCOPAL CHURCHLocation not reported, CT · Active | Location not reported, CT | Corporation | Dec 8, 1922 | Active |
| ST. BERNADETTE'S CHURCH CORPORATION, THELocation not reported, CT · Merged | Location not reported, CT | Other | Nov 26, 1938 | Merged |
| "ST. PETER'S CHURCH OF NEW HAVEN", CONNECTICUT.Location not reported, CT · Active | Location not reported, CT | Other | Not reported | Active |
| BOARD OF TRUSTEES OF THE SHEFFIELD SCIENTIFIC SCHOOL.Location not reported, CT · Active | Location not reported, CT | Other | Feb 17, 1871 | Active |
| CITY LODGE NO. 36. I.O.O.F. OF NEW HAVEN, CONNECTICUT.Location not reported, CT · Active | Location not reported, CT | Other | Jun 26, 1872 | Active |
| CITY LODGE NO. 36. I.O.O.F.Location not reported, CT · Active | Location not reported, CT | Other | Not reported | Active |
| COLUMBIA REBEKAH DEGREE LODGE NO. 15 D.OF.R.I.O.O.F.Location not reported, CT · Active | Location not reported, CT | Other | Not reported | Active |
| THE CONVENT OF THE SACRED HEART CORPORATION.Location not reported, CT · Active | Location not reported, CT | Other | Nov 15, 1876 | Active |
| FRENCH MUTUAL AID AND BENEVOLENT SOCIETY.Location not reported, CT · Active | Location not reported, CT | Other | Nov 10, 1871 | Active |
| GERMANIA LODGE NO. 78. I.O.O.F.Location not reported, CT · Active | Location not reported, CT | Other | Jan 31, 1883 | Active |
| GERMANY LODGE NO. 78. I.O.O.F. OF. NEW HAVEN, CONNECTICUT.Location not reported, CT · Active | Location not reported, CT | Other | Dec 10, 1869 | Active |
| GOLDEN RULE ENCAMPMENT NO. 24 I.O.O.F. OF NEW HAVEN, CONN.Location not reported, CT · Active | Location not reported, CT | Other | Feb 25, 1884 | Active |
| GRAND STREET BAPTIST SOCIETYLocation not reported, CT · Active | Location not reported, CT | Other | Dec 4, 1872 | Active |
| THE LABORERS UNION BENEVOLENT SOCIETY OF NEW HAVEN, CONNECTICUT.Location not reported, CT · Active | Location not reported, CT | Other | May 18, 1854 | Active |
| THE LADIES GERMANIA BENEVOLENT ASS'N.Location not reported, CT · Active | Location not reported, CT | Other | Sep 25, 1885 | Active |
| MASONIC MUTUAL BENEFIT ASSOCIATION OF NEW HAVEN, CONN.Location not reported, CT · Active | Location not reported, CT | Other | Jul 27, 1900 | Active |
| MONTEWESE LODGE NO.15,I.O.O.F. OF NEW HAVEN, CONN.Location not reported, CT · Active | Location not reported, CT | Other | Feb 5, 1885 | Active |
| THE NEW HAVEN CONCERT ASSOCIATION.Location not reported, CT · Active | Location not reported, CT | Other | Mar 3, 1885 | Active |
| NEW HAVEN LODGE NO. 46, I.O.F.S.OF.I.Location not reported, CT · Active | Location not reported, CT | Other | Aug 29, 1873 | Active |
| THE NEW HAVEN SOCIETY OF MEDICAL IMPROVEMENT.Location not reported, CT · Active | Location not reported, CT | Other | Dec 31, 1870 | Active |
| PYTHIAN BENEFIT ASSOCIATION OF THE STATE OF CONNECTICUTLocation not reported, CT · Active | Location not reported, CT | Other | Feb 4, 1875 | Active |
| QUINNIPIAC LODGE NO.1,I.O.O.F.OF NEW HAVEN, CONNECTICUT.Location not reported, CT · Active | Location not reported, CT | Other | Nov 17, 1868 | Active |
| QUINNIPIAC LODGE NO.1,I.O.O.F.OF NEW HAVEN, CONNECTICUT.Location not reported, CT · Active | Location not reported, CT | Other | Feb 6, 1874 | Active |
| RELIEF LODGE NO.86,I.O.O.F.Location not reported, CT · Active | Location not reported, CT | Other | Mar 24, 1870 | Active |
| THE SACRED HEART TOTAL ABSTINENCE AND BENEVOLENT SOCIETY, OF NEW HAVEN, CONNECTICUT.Location not reported, CT · Active | Location not reported, CT | Other | Mar 12, 1884 | Active |
| SASSACUS ENCAMPMENT NO. 1, I.O.O.F. NEW HAVEN, CONNECTICUT.Location not reported, CT · Active | Location not reported, CT | Other | Mar 8, 1875 | Active |
| SCHILLER LODGE NO.5. KNIGHTS OF PYTHIAS.Location not reported, CT · Active | Location not reported, CT | Other | Jul 19, 1885 | Active |
| SONS OF ST. PATRICK'S BENEVOLENT AND BURIAL AID SOCIETY OF NEW HAVEN.Location not reported, CT · Active | Location not reported, CT | Other | Nov 14, 1884 | Active |
| WOMAN'S MISSIONARY SOCIETY OF NEW HAVEN.Location not reported, CT · Active | Location not reported, CT | Other | Mar 11, 1872 | Active |
| THE YALE NATURAL-HISTORY SOCIETY.Location not reported, CT · Active | Location not reported, CT | Other | Jun 21, 1836 | Active |
| THE YALE NAVY.Location not reported, CT · Active | Location not reported, CT | Other | Oct 13, 1863 | Active |
| THE YALE UNIVERSITY BOAT CLUB.Location not reported, CT · Active | Location not reported, CT | Other | Not reported | Active |
| THE CONGREGATION MOGAN DAVID OF NEW HAVENLocation not reported, CT · Active | Location not reported, CT | Other | May 13, 1903 | Active |
| CONGREGATION BETH HAMEDRESH HAGODEL B'NAI ISREALLocation not reported, CT · Active | Location not reported, CT | Other | Jul 7, 1901 | Active |
| FRIENDS OF BOYS INCORPORATEDLocation not reported, CT · Active | Location not reported, CT | Other | Jun 1, 1911 | Active |
| MT. CALVARY DELIVERANCE TABERNACLELocation not reported, CT · Active | Location not reported, CT | Other | Oct 9, 1964 | Active |
| FIRST CHURCH OF CHRIST IN NEW HAVEN THELocation not reported, CT · Consolidated | Location not reported, CT | Corporation | Jul 7, 1960 | Consolidated |
| THE FIRST CHURCH OF CHRIST IN NEW HAVEN, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Oct 14, 1975 | Active |
| GOOD SHEPARD HOLINESS CHURCH OF CHRIST. DELIVERANCE CENTER THELocation not reported, CT · Active | Location not reported, CT | Corporation | Feb 1, 1974 | Active |