| Other organizations in Maryland |
| Id | Name | Address | State | Established | Total Income |
|---|
| 1 | Olivet Pentecostal Church Of Love Inc | 31552 Olivet Hill Rd, Galena, MD 21635-1859 | MD | 2003-08 | $0 |
| 2 | Ollie J Thomas Ministries Inc, Water Of Life Christian Church | 13103 Whiteholm Dr, Uppr Marlboro, MD 20774-1831 | MD | 1993-08 | $0 |
| 3 | Olney Adventist Preparatory School | 4100 Olney-Laytonsville Rd, Olney, MD 20832-1804 | MD | 1947-04 | $0 |
| 4 | Olney Baptist Church | PO BOX 325, Olney, MD 20830-0325 | MD | 1963-10 | $0 |
| 5 | Olney Kiwanis Foundation Inc | Po Box 128, Olney, MD 20832 | MD | 2011-08 | $0 |
| 6 | Oloo-Dale Foundation | 9225 Brandy Ln Apt C, Laurel, MD 20723-1622 | MD | 2011-02 | $0 |
| 7 | Omega Gospel Missions | 15205 Jerrington Ct, Bowie, MD 20721-7270 | MD | 2008-04 | $389,320 |
| 8 | Omega Psi Phi Fraternity Inc, 904 Alpha Lambda Lambda District 2 | PO BOX 1112, Frederick, MD 21702-0112 | MD | 1953-01 | $0 |
| 9 | Omega Psi Phi Fraternity Inc Chi Delta Chapter | Adele H Stamp Student Union Box 11, College Park, MD 20742 | MD | 1953-01 | $0 |
| 10 | Omega Psi Phi Fraternity | 14000 Jericho Park Rd, Bowie, MD 20715 | MD | 1970-05 | $0 |
| 11 | Omicron Delta Epsilon International Honor Society In Economics Inc | Washington College 300 Washington Avenue, Chestertown, MD 21620 | MD | 1974-01 | $0 |
| 12 | Omicron Delta Epsilon International Honor Society In Economics Inc, Omicron Of Maryland Goucher College | 1021 Dulaney Valley Rd, Baltimore, MD 21204-2753 | MD | 1974-01 | $0 |
| 13 | Omicron Delta Epsilon | 14000 Jericho Park Road, Bowie State University, MD 20715 | MD | 1974-01 | $0 |
| 14 | On One Accord Ministries Inc | PO BOX 1805, Laplata, MD 20646 | MD | 2009-07 | $0 |
| 15 | On Time Church Ministries Inc | PO BOX 232, Aberdeen, MD 21001-0232 | MD | 2003-11 | $0 |
| 16 | On-N-2 Golf Club | 2875 Merchant Court, Waldorf, MD 20603 | MD | 2014-01 | $0 |
| 17 | Oncology Foundation Of Maryland And The District Of Columbia Inc | 550m Ritchie Hwy Box 271, Severna Park, MD 21146 | MD | 2009-07 | $0 |
| 18 | Oncology Nursing Society, C130 Greater Baltimore | 3026 Woodring Ave, Parkville, MD 21234-7829 | MD | 1981-09 | $0 |
| 19 | Oncology Nursing Society, C385 National Capital | 9308 Weathervane Pl, Montgomry Vlg, MD 20886-1411 | MD | 1981-09 | $0 |
| 20 | Oncology Nursing Society, C184 Potomac Area | 7111 Woodmont Ave Apt 916, Bethesda, MD 20815-6237 | MD | 1981-09 | $0 |
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