| Other organizations in Mississippi |
| Id | Name | Address | State | Established | Total Income |
|---|
| 1 | Oak Meadows Homeowners Association | PO BOX 5938, Greenville, MS 38704-5938 | MS | 1973-11 | $0 |
| 2 | Oakland Cemetery Association Inc | 79 Oak St, Oakland, MS 38948-2311 | MS | 1984-03 | $0 |
| 3 | Oaks District Association Inc | 1113 Adeline St, Hattiesburg, MS 39401-5024 | MS | 2014-04 | $0 |
| 4 | Ocean Springs Carnival Association Inc | 839 Ward Ave, Ocean Springs, MS 39564 | MS | 2010-02 | $0 |
| 5 | Okolona Ms Endowment Foundation Of The Shearer & Richardson Families | 109 School St, Okolona, MS 38860-1327 | MS | 1965-04 | $0 |
| 6 | Old Crystal Springs Cemetery Association Inc | 15201 New Zion Road, Crystal Springs, MS 39059 | MS | 1984-10 | $0 |
| 7 | Olde Towne Middle School Pto | 210 Sunnybrook Road, Ridgeland, MS 39157 | MS | 2014-09 | $0 |
| 8 | Ole Miss Naval Alumni Association Incorporated | PO BOX 69, University, MS 38677-0069 | MS | 1986-01 | $0 |
| 9 | Olive Branch | PO BOX 1452, Tupelo, MS 38802-1452 | MS | 1959-06 | $0 |
| 10 | Olive Branch Public Improvement Corporation | 9189 Pigeon Roost Rd, Olive Branch, MS 38654-2409 | MS | 1994-06 | $0 |
| 11 | Omega Psi Phi Fraternity Eta Zeta | Po Box 4375, University, MS 38677 | MS | | $0 |
| 12 | Omega Psi Phi Fraternity Inc Eta Zeta Chapter | University Of Mississippi, University, MS 38677 | MS | 1953-01 | $0 |
| 13 | Omega Psi Phi Fraternity Psi Rho Chapter | PO BOX 94, Holly Springs, MS 38635-0094 | MS | 1967-02 | $0 |
| 14 | Omicron Delta Epsilon International Honor Society In Economics Inc, Alpha Of Ms Univ Of Southern Miss | College Of Business Deans Office Bo, Hattiesburg, MS 39406-0001 | MS | 1974-01 | $0 |
| 15 | Omicron Delta Epsilon International Honor Society In Economics Inc, Epsilon Of Ms Jackson State Univ | Dept Of Econ 1400 J R Lynch, Jackson, MS 39217-0001 | MS | 1974-01 | $0 |
| 16 | Omicron Delta Epsilon Intl Honor Society In Economics Inc, Beta Of Ms Mississippi St Univ | PO BOX 9580, Msu, MS 39762-9580 | MS | 1974-01 | $0 |
| 17 | Omicron Delta Epsilon Intl Honor Society In Economics Inc, Delta Of Ms Millsaps College | 1701 N State St Box 150605, Jackson, MS 39210-0002 | MS | 1974-01 | $0 |
| 18 | Omicron Delta Epsilon Intl Honor Society In Economics Inc, Gamma Of Ms Univ Of Mississippi | Dept Of Economics And Fin, University, MS 38677 | MS | 1974-01 | $0 |
| 19 | Omicron Kappa Upsilon-Honorary Dental Society | 2500 North State Street, Jackson, MS 39216 | MS | 2014-06 | $0 |
| 20 | Omicron Rho Lambda Alpha Phi Alpha Fraternity Inc Educational Founda | P O Box 821544, Vicksburg, MS 39182 | MS | 2014-12 | $0 |
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