| Other organizations in Iowa |
| Id | Name | Address | State | Established | Total Income |
| 1 | Operative Plasterers & Cement Masons International Association | 1224 S E Diehl, Des Moines, IA 50315 | IA | 1940-07 | $191,683 |
| 2 | Opportunities Unlimited | 3439 Glen Oaks Blvd, Sioux City, IA 51104-1761 | IA | 1992-01 | $5,508,605 |
| 3 | Opportunity Homes Incorporated | 606 Iowa Ave, Decorah, IA 52101-1237 | IA | 1980-12 | $2,291,146 |
| 4 | Opportunity Living | 1890 E Main St, Lake City, IA 51449-7706 | IA | 1987-08 | $8,380,018 |
| 5 | Opportunity Living Benefit Tr | 1890 E Main St, Lake City, IA 51449-7706 | IA | 1997-06 | $1,458,482 |
| 6 | Opportunity Living Foundation | 1890 E Main St, Lake City, IA 51449-7706 | IA | 1996-11 | $72,937 |
| 7 | Optimist International, 40999 Iowa District | PO BOX 307, West Point, IA 52656-0307 | IA | 1968-10 | $66,066 |
| 8 | Optimist International, 40012 Oc Of Burlington-West Ia | PO BOX 595, Burlington, IA 52601-0595 | IA | 1958-07 | $32,468 |
| 9 | Optimist International, Optimist Club Of Cedar Rapids Inc 40020 Oc Of Cedar Rapids Ia | 880 W 10th Avenue, Marion, IA 52302-2807 | IA | 1959-09 | $0 |
| 10 | Optimist International, 40040 Oc Of Davenport Ia | 4827 Amesbury Ct, Davenport, IA 52807-3433 | IA | 1966-02 | $113,453 |
| 11 | Optimist International, 40055 Oc Of Dubuque Ia | 3015 Saint Anne Dr, Dubuque, IA 52001-3902 | IA | | $57,448 |
| 12 | Optimist International, Optimist Club Of Coralville | Po Box 5397, Coralville, IA 52241 | IA | 1958-07 | $67,248 |
| 13 | Optimist International, Optimist Club Of Maquoketa | Po Box 803, Maquoketa, IA 52060 | IA | 1966-02 | $0 |
| 14 | Optimist International, Morning Optimist Club Of Marshalltown | Po Box 1236, Marshalltown, IA 50158 | IA | 1958-07 | $47,007 |
| 15 | Optimist International, 40113 Optimist Club Of Underwood Ia | 70 Cottner Dr, Council Blfs, IA 51503-4801 | IA | 1958-07 | $0 |
| 16 | Optimist International, 40122 Walnut Morning | PO BOX 265, Walnut, IA 51577-0265 | IA | 1958-07 | $42,202 |
| 17 | Orab Music Booster Club | 1700 E 4th St, Sheldon, IA 51201-1745 | IA | 2004-06 | $23,252 |
| 18 | Orange City 21 Foundation | 125 Central Ave Se, Orange City, IA 51041-1738 | IA | 1989-05 | $91,311 |
| 19 | Orange City Area Health Foundation | 1000 Lincoln Cir Se, Orange City, IA 51041-1862 | IA | 1994-05 | $110,518 |
| 20 | Orange City Arts Council | PO BOX 202, Orange City, IA 51041-0202 | IA | 1989-04 | $49,690 |
| 21 | Orange City Community Day Care Center Inc | 1103 Lincoln Cir Se, Orange City, IA 51041-1841 | IA | 1988-07 | $819,394 |
| 22 | Orange City Municipal Golf Association Inc | 902 7th St Ne, Orange City, IA 51041-1119 | IA | 1995-02 | $637,812 |
| 23 | Orange City Society For Christian Instruction | 604 3rd St Sw, Orange City, IA 51041-1612 | IA | 1968-05 | $1,970,623 |
| 24 | Orchard Place | 2116 Grand Ave, Des Moines, IA 50312-5304 | IA | 1997-03 | $17,453,991 |
| 25 | Orchard Place Foundation | 2116 Grand Ave, Des Moines, IA 50312-5304 | IA | 1983-03 | $887,874 |
| 26 | Order Of The Eastern Star Of Iowa, 25 Harmony Chapter | 130 S 6th St, Council Blfs, IA 51501-4234 | IA | 1972-09 | $20,217 |
| 27 | Organization Of Miso States Inc | 100 Court Ave Ste 315, Des Moines, IA 50309-2257 | IA | 2004-07 | $560,068 |
| 28 | Organization Promoting Everlasting Neighbors Inc | Po Box 253, Newton, IA 50208 | IA | 1994-12 | $0 |
| 29 | Orphaned And Injured Wildlife Incorporated | 3012 Center Lake Dr, Spirit Lake, IA 51360-7271 | IA | 1984-08 | $65,409 |
| 30 | Orpheum Centre Of Marshalltown Inc | 119 E Main St, Marshalltown, IA 50158-1745 | IA | 2001-08 | $4,125 |
| 30 biggest affiliated organizations |
| Affiliation | Name | Address | State | Established | Total Income |
|---|
| Subordinate | Optimist International, 33095 Oc Of Carroll County-Freedom | PO BOX 464, Sykesville, MD 21784-0464 | MD | 1966-02 | $655,467 |
| Subordinate | Optimist International, 04444 Opti Club Of Portland In | PO BOX 1244, Portland, IN 47371-3244 | IN | 1958-07 | $132,238 |
| Subordinate | Optimist International, 35027 Oc Of Brookings Sd | PO BOX 836, Brookings, SD 57006-0836 | SD | 1958-07 | $89,077 |
| Subordinate | Optimist International, 10058 Optimist Club Of Minden Ne | PO BOX 276, Minden, NE 68959-0276 | NE | 1958-07 | $41,909 |
| Subordinate | Optimist International, Old Town Optimist Club-Albuquerque Robert E Romero | 1521 Edith Blvd Ne, Albuquerque, NM 87102-1611 | NM | 1958-07 | $36,500 |
| Subordinate | Optimist International, 30524 Oc Of Poplar Bluff Missouri | 1650 W Harper St, Poplar Bluff, MO 63901-4119 | MO | 1958-07 | $34,099 |
| Subordinate | Optimist International, Roseville Optimist Club | 27848 Eastwick Sq, Roseville, MI 48066 | MI | 1958-07 | $32,865 |
| Subordinate | Optimist International, 41022 Oc Of Coronado Ca | 242 D Ave, Coronado, CA 92118-1319 | CA | 1971-02 | $20,555 |
| Subordinate | Optimist International | 7011a Erland Road, Santa Rosa, CA 95404 | CA | 1956-03 | $16,622 |
| Central | Optimist International, Parent Organization | 4494 Lindell Blvd, Saint Louis, MO 63108-2404 | MO | 1958-07 | $6,311,768 |
| Subordinate | Optimist International, 3513 Oc Of St Cloud Mn | PO BOX 942, Saint Cloud, MN 56302-0942 | MN | 1958-07 | $3,963,744 |
| Subordinate | Optimist International, 03165 Louisville-Hikes Point Ky | PO BOX 20021, Louisville, KY 40250-0021 | KY | 1958-07 | $2,147,167 |
| Subordinate | Optimist International, 03007 Catlettsburg-Boyd Ky | PO BOX 2258, Ashland, KY 41105-2258 | KY | 1958-07 | $2,079,818 |
| Subordinate | Optimist International, 06050 Corpus Christi-Downtown Tx | 2613 Riggan St, Crp Christi, TX 78404-3948 | TX | 1958-07 | $1,126,801 |
| Subordinate | Optimist International, 35100 Oc Of Luverne Mn | 115 E Fairway Dr, Luverne, MN 56156-1148 | MN | 1958-07 | $1,093,383 |
| Subordinate | Optimist International, 39140 Opti Club Of Gretna-West Bank | 2448 Cumberland Ct, New Orleans, LA 70131-1945 | LA | 1966-02 | $1,091,328 |
| Subordinate | Optimist International, 06140 Opti Club Of Waco-Northwest T | PO BOX 7164, Waco, TX 76714-7164 | TX | 1960-01 | $1,022,261 |
| Subordinate | Optimist International, 61220 Opti Club Of Hammocks-Kendall | 14629 Sw 104th St Ste 175, Miami, FL 33186-2905 | FL | 1958-07 | $754,186 |
| Subordinate | Optimist International, 36400 Oc Of Kansas City-South Side | 11154 Blue Ridge Blvd, Kansas City, MO 64134-3201 | MO | 1958-07 | $733,615 |
| Subordinate | Optimist International, 36234 Oc Of Lake Lotawana Mo | PO BOX 6642, Lees Summit, MO 64064-6642 | MO | 1958-07 | $693,198 |
| Subordinate | Optimist International, 32015 Optimist Club Of Boise Id | PO BOX 44859, Boise, ID 83711-0859 | ID | 1950-09 | $632,310 |
| Subordinate | Optimist International, 10022 Oc Of Lincoln-Downtown Ne | 1248 O St Ste 225, Lincoln, NE 68508-1419 | NE | 1958-07 | $629,206 |
| Subordinate | Optimist International, 35204 Oc Of New Ulm Mn | PO BOX 203, New Ulm, MN 56073-0203 | MN | 1958-07 | $591,176 |
| Subordinate | Optimist International, 16090 Oc Of Herndon Va | PO BOX 1595, Herndon, VA 20172-1595 | VA | 1958-07 | $517,211 |
| Subordinate | Ashland Optimist Club, Ashland Optimist Pool | 511 N Optimist Drive, Ashland, MO 65010 | MO | 1966-02 | $489,781 |
| Subordinate | Optimist International, 35130 Central Mn Optimist Club Inc | 17000 Danzig Rd, Kimball, MN 55353-9704 | MN | | $486,759 |
| Subordinate | Optimist International, 20380 Optimist Of San Leandro Ca | 3001 Davis St, San Leandro, CA 94577-2235 | CA | 1958-07 | $467,924 |
| Subordinate | Optimist International, 35171 Oc Of Worthington Mn | PO BOX 695, Worthington, MN 56187-0695 | MN | 1958-07 | $454,414 |
| Subordinate | Optimist International, Putnam City Oklahoma Club | PO BOX 939, Bethany, OK 73008-0939 | OK | 1968-10 | $453,611 |
| Subordinate | Optimist International, 36001 Oc Of Adrian Mo | 7 Glenbrook Rd, Adrian, MO 64720-9796 | MO | 1970-05 | $450,563 |
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