| ADA ** FARMERS GIN COMPANY | — | 1600000727 | 1904-03-24 | Inactive | |
| ADA ** FELLOWSHIP BAPTIST CHURCH OF ADA, INC. | — | 1400271830 | 1974-05-15 | Active | |
| ADA ** FIRST ASSEMBLY OF GOD OF ADA | — | 1400148825 | 1956-05-18 | Active | |
| ADA ** FIRST BAPTIST CHURCH OF HOMER | — | 1400126704 | 1948-10-28 | Active | |
| ADA ** FIRST CHRISTIAN CHURCH OF ADA FOUNDATION, INC. | — | 1400336586 | 1979-06-14 | Active | |
| ADA ** FIRST CHRISTIAN CHURCH OF ADA, OKLAHOMA | — | 1400042066 | 1923-03-02 | Active | |
| ADA ** FIRST CHURCH OF THE NAZARENE OF ADA, OKLAHOMA | — | 1400174894 | 1962-04-03 | Expired | |
| ADA ** FIRST FREE WILL BAPTIST CHURCH, OF ADA, OKLAHOMA | — | 1400165480 | 1960-04-13 | Active | |
| ADA ** FIRST PENTECOSTAL HOLINESS CHURCH OF ADA, OKLAHOMA | — | 1400252843 | 1972-12-14 | Active | |
| ADA ** FIRST UNITED PENTECOSTAL CHURCH OF ADA, INC. | — | 1400550052 | 1995-03-28 | Active | |
| ADA ** FULL GOSPEL MISSION OF ADA, OKLAHOMA | — | 1400067588 | 1930-07-23 | Active | |
| ADA ** GALEY BAPTIST CHURCH | — | 1400402883 | 1983-03-21 | Active | |
| ADA ** GOD'S OBEDIENT REPLENISH, OF ADA, OKLAHOMA | — | 1400053403 | 1926-11-27 | Active | |
| ADA ** GOSPEL TABERNACLE | — | 1400286687 | 1975-09-22 | Active | |
| ADA ** GRACE CHRISTIAN FELLOWSHIP, INC. | — | 1400521903 | 1993-03-11 | Active | |
| ADA ** IMMANUEL MISSIONARY BAPTIST CHURCH, INC. | — | 1400626652 | 1999-07-13 | Active | |
| ADA ** LIVING WATERS TABERNACLE OF ADA, INC. | — | 1400507144 | 1991-12-04 | Active | |
| ADA ** LOVELADY BAPTIST CHURCH, INC. | — | 1400525375 | 1993-06-15 | Active | |
| ADA ** MAXWELL HOLINESS CHURCH, INC. | — | 1400439425 | 1985-11-27 | Active | |
| ADA ** MISSION OF GOD (INC.) | — | 2100488438 | 1990-03-21 | Active | |
| ADA ** MORRIS MEMORIAL BAPTIST CHURCH | — | 1400366039 | 1981-04-13 | Active | |
| ADA ** NEW HOPE BAPTIST CHURCH OF ADA, OKLAHOMA | — | 1400432378 | 1985-05-06 | Active | |
| ADA ** OAK AVENUE BAPTIST CHURCH. OF ADA, OKLAHOMA | — | 1400033788 | 1920-07-21 | Active | |
| ADA ** OKLAHOMA CO-OPERATIVE BOOK COMPANY | — | 1600017656 | 1915-12-09 | Expired | |
| ADA ** OKLAHOMA STATE BANK, ADA, OKLAHOMA | — | 1100079730 | 1908-09-24 | Merged | |
| ADA ** PARADISE HILLS BAPTIST CHURCH | — | 1400367352 | 1981-05-06 | Active | |
| ADA ** RIVER OF LIFE, INC. | — | 1400598575 | 1998-02-09 | Active | |
| ADA ** SOUTHWEST CHURCH OF CHRIST, ADA, OKLA. | — | 1400237046 | 1971-04-14 | Active | |
| ADA ** TABERNACLE OF PRAISE, INC. | — | 1400541963 | 1994-09-06 | Active | |
| ADA ** THE FIRST APOSTOLIC CHURCH OF ADA, OKLAHOMA | — | 1400640782 | 2000-02-28 | Active | |
| ADA ** THE FIRST BAPTIST CHURCH, AT ADA, OKLAHOMA | — | 1400007186 | 1911-01-16 | Active | |
| ADA ** THE FIRST LUTHERAN CHURCH OF ADA, OKLAHOMA | — | 1400141105 | 1954-02-09 | Active | |
| ADA ** THE FIRST PRESBYTERIAN CHURCH, U.S.A., OF ADA, OKLAHOMA | — | 1400006880 | 1910-11-01 | Active | |
| ADA ** THE FIRST UNITED METHODIST CHURCH OF ADA FOUNDATION, INC. | — | 1400229310 | 1970-05-12 | Expired | |
| ADA ** THE GUARANTY STATE BANK | — | 1110000603 | 1908-02-10 | Expired | |
| ADA ** THE IMMANUEL BAPTIST CHURCH, ADA, OKLAHOMA | — | 1400172513 | 1961-10-09 | Active | |
| ADA ** THE MERCHANTS & PLANTERS STATE BANK OF ADA, OKLAHOMA | — | 1100003416 | 1909-08-18 | Expired | |
| ADA ** THE SECURITY STATE BANK ADA, OKLAHOMA | — | 1100034590 | 1920-10-02 | Expired | |
| ADA ** THE SPIRITUAL ASSEMBLY OF THE BAHA' IS OF ADA | — | 1400278172 | 1974-12-17 | Active | |
| ADA ** THE TABERNACLE OF THE CONGREGATION PENTECOSTAL CHURCH OF GOD, INC. | — | 1400529682 | 1993-10-13 | Active | |
| ADA ** TRINITY BAPTIST CHURCH OF ADA, OKLAHOMA | — | 1400096767 | 1938-10-12 | Active | |
| ADA ** UNION HILL BAPTIST CHURCH, INC. | — | 1400468398 | 1988-06-06 | Active | |
| ADA ** UNITED PENTECOSTAL CHURCH OF ADA, INC. | — | 1400228136 | 1970-03-18 | Merged | |
| ADA ** UNITY MISSIONARY BAPTIST CHURCH OF ADA, INC. | — | 1400534181 | 1994-02-09 | Active | |
| ADA ** VINEYARD CHRISTIAN FELLOWSHIP OF ADA, INC. | — | 1400628473 | 1999-08-16 | Active | |
| ADA 115 SOUTH BROADWAY LLC | — | 3513036927 | 2021-12-09 | Active | ADA |
| ADA 1970 OIL & GAS PROGRAM | — | 3400002740 | 1973-12-10 | Withdrawn | |
| ADA 1971 OIL & GAS PROGRAM | — | 3400002741 | 1973-12-10 | Withdrawn | |
| ADA 1971-B OIL & GAS PROGRAM | — | 3400002742 | 1973-12-10 | Canceled | |
| ADA 1973-B OIL & GAS INCOME PROGRAM, SERIES II | — | 3400002734 | 1973-12-27 | Canceled | |