| Other organizations in Maine |
| Id | Name | Address | State | Established | Total Income |
| 1 | Optimist International, 01917 Oxford Hills Optimist Club Me | 71 Brock School Rd, Buckfield, ME 04220-4500 | ME | 1958-07 | $0 |
| 2 | Optimist International, Gray New Gloucester Optimist Club | Po Box 1192, Gray, ME 04039 | ME | 1958-07 | $0 |
| 3 | Order Of Eastern Star Of Maine | Po Box 6, West Paris, ME 04289 | ME | 1972-09 | $0 |
| 4 | Order Of The Eastern Star Of Maine | 237 Belyea Rd, Edmunds, ME 04628 | ME | 1972-09 | $0 |
| 5 | Order Of The Founders & Patriots Of America | P O Bo 67, Limerick, ME 04048-0067 | ME | 1972-04 | $0 |
| 6 | Ordo Templi Orientis Usa, Abrahadabra Oasis | PO BOX 10468, Portland, ME 04104-0468 | ME | 2005-08 | $0 |
| 7 | Orono Community Church | PO BOX 53, Orono, ME 04473-0053 | ME | 1975-02 | $0 |
| 8 | Orono Historical Society | Po Box 324, Orono, ME 04473 | ME | 1991-03 | $0 |
| 9 | Orrington Fire & Rescue Association | 14 Johnson Mill Rd, Orrington, ME 04474 | ME | 2010-11 | $0 |
| 10 | Ossipee Valley Christian School | 1890 North Rd, Cornish, ME 04020-3806 | ME | 2001-03 | $0 |
| 11 | Osteopathic Healthcare Services | 200a Kennedy Memorial Dr, Waterville, ME 04901-4526 | ME | | $0 |
| 12 | Otisfield Volunteer Firefighters | 403 State Route 121, Oxford, ME 04270 | ME | 2011-07 | $0 |
| 13 | Our God Is Faithful Ministries | 40 Weeks Rd, Gardiner, ME 04345-6271 | ME | 1964-02 | $0 |
| 14 | Overcomers Christians Fellowship | 290 Swan Lake Ave, Belfast, ME 04915-7033 | ME | 2002-09 | $0 |
| 15 | Owen R Stevens Charitable Remainder Annuity Tr | PO BOX 31, Portland, ME 04112-0031 | ME | | $0 |
| 16 | Owls Head South Thomaston And Thomaston Solid Waste Corporation | PO BOX 367, Thomaston, ME 04861-0367 | ME | 2009-05 | $0 |
| 17 | Oxford Advent Christian Church | 1130 Main St, Oxford, ME 04270-3312 | ME | 1958-09 | $0 |
| 18 | Oxford Baseball Softball Association | Po Box 232, Oxford, ME 04270 | ME | 2011-06 | $0 |
| 19 | Oxford Hills Community Gardens, Alan Day Community Garden | 26 Whitman Street, Norway, ME 04268 | ME | 2011-05 | $0 |
| 20 | Packard Charitable Remainder Unitrust, Anthony F Assante Ttee | 76 Littlefield Rd, Lisbon, ME 04250-6009 | ME | | $0 |
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