| Other organizations in Illinois |
| Id | Name | Address | State | Established | Total Income |
| 1 | Ottawa Educators International Inc | C/O 3354 E 2250th Rd, Ottawa, IL 61350 | IL | 1999-11 | $0 |
| 2 | Ottawa Friendship House Work Activity Center Inc | 1718 N 2525th Rd, Ottawa, IL 61350-9329 | IL | 1967-10 | $1,672,298 |
| 3 | Ottawa Girls Fastpitch Association | Po Box 2022, Ottawa, IL 61350 | IL | 1998-02 | $69,971 |
| 4 | Ottawa Hiway Credit Union | 700 E Norris Dr, Ottawa, IL 61350-1628 | IL | 1970-10 | $368,835 |
| 5 | Ottawa Lodge No 960 Loyal Order Of Moose, 960 | PO BOX 656, Ottawa, IL 61350-0656 | IL | 1935-08 | $238,805 |
| 6 | Ottawa Opportunity School | 114 E Jefferson St, Ottawa, IL 61350-5004 | IL | 1974-02 | $233,037 |
| 7 | Ottawa Regional Hospital & Healthcare Ctr Liability Loss Fund | 1100 E Norris Dr, Ottawa, IL 61350-1604 | IL | 1987-04 | $112,396 |
| 8 | Ottawa Rescue Squad Inc | PO BOX 234, Ottawa, IL 61350-0234 | IL | 1963-05 | $84,463 |
| 9 | Ottawa Scouting Museum Assn | PO BOX 2241, Ottawa, IL 61350-6841 | IL | 1994-05 | $51,585 |
| 10 | Ottawa Township High School District 140 Educational, C-O Michael Clinch | 211 E Main St, Ottawa, IL 61350-3111 | IL | 1994-08 | $104,767 |
| 11 | Ottawa Visitors Center | 100 W Lafayette St, Ottawa, IL 61350-2108 | IL | 1996-12 | $324,949 |
| 12 | Otter Creek Historical Society Inc | 107 E Main St, Otterville, IL 62052-6791 | IL | 1999-06 | $13,756 |
| 13 | Otterbeck Family Foundation | 5215 Old Orchard Rd Ste 525, Skokie, IL 60077-1055 | IL | 2003-05 | $27 |
| 14 | Otto Baum Company Inc Foundation | 866 N Main St, Morton, IL 61550-1602 | IL | 1998-12 | $51,000 |
| 15 | Otto Bender Scholarship Tr No 895 | PO BOX 280, Carlyle, IL 62231-0280 | IL | 1996-07 | $13,871 |
| 16 | Otto W Lehmann Foundation | 680 N Lake Shore Dr 1722 Tower Res, Chicago, IL 60611 | IL | 1967-08 | $130,709 |
| 17 | Our Childrens Homestead Inc | 387 Shuman Blvd, Naperville, IL 60563-8450 | IL | 1995-04 | $9,015,632 |
| 18 | Our Chinese Daughters Foundation Inc | PO BOX 1243, Bloomington, IL 61702-1243 | IL | 2005-06 | $1,335,197 |
| 19 | Our House Of Hope Inc | 740 Florsheim Dr Suite 11 C/O Sandra Burkett, Libertyville, IL 60048 | IL | 2007-08 | $43,003 |
| 20 | Our Lady Montessori School | 4555 W Thorndale Ave, Chicago, IL 60646-5829 | IL | 2005-05 | $45,663 |
| 21 | Our Lady Of Angels Retirement Home | 1201 Wyoming Ave, Joliet, IL 60435-3718 | IL | 1946-03 | $8,911,904 |
| 22 | Our Lady Of Mount Carmel-St Marys School Education Foundation | PO BOX 1018, Herrin, IL 62948-1018 | IL | 1987-10 | $701,064 |
| 23 | Our Lady Of The Sacred Heart Basic Studies | 3218 11th St, Rockford, IL 61109-2204 | IL | 1994-07 | $343,668 |
| 24 | Our Place | 1413 Morning Glory Dr, Vandalia, IL 62471 | IL | 2006-06 | $0 |
| 25 | Our Place Homework And Enrichment Center | 1335 Dr 115th St, Chicago, IL 60643 | IL | 2001-05 | $116 |
| 26 | Our Place Of New Trier Township Inc | 370 Chestnut St, Winnetka, IL 60093-2415 | IL | 2009-03 | $288,428 |
| 27 | Our Saviour Rectory Task Force | 1415 W College, Jacksonville, IL 62650 | IL | 1997-01 | $0 |
| 28 | Our Sorrowful Mothers Ministry | 331 N 7th St, Vandalia, IL 62471-2229 | IL | 2007-01 | $416,271 |
| 29 | Our World | 145 Springfield Ct, Ofallon, IL 62269-2495 | IL | 1975-10 | $1,303,318 |
| 30 | Our World Underwater Scholarship Society | PO BOX 4428, Chicago, IL 60680-4428 | IL | 1980-05 | $150,863 |
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