| Other organizations in District of Columbia |
| Id | Name | Address | State | Established | Total Income |
| 1 | International Trowel Trade Council | 620 F St Nw Fl 8, Washington, DC 20004-1628 | DC | 1993-07 | $40,800 |
| 2 | International Union Of Operating Engineers And Pipe Line | 1125 17th St Nw, Washington, DC 20036-4709 | DC | 2000-11 | $2,635,059 |
| 3 | International Union Of Operating Engineers National Training Fund | 1125 17th Street Nw, Washington, DC 20036-4709 | DC | 1995-10 | $11,856,964 |
| 4 | International University Exchange Inc | PO BOX 42449, Washington, DC 20015-0449 | DC | 1992-09 | $175,927 |
| 5 | International Valve Spring Wire Manufacturers Association | 1909 K St Nw Fl 9, Washington, DC 20006-1115 | DC | 1987-07 | $31,118 |
| 6 | International Vision Inc | 3301 New Mexico Ave Nw Ste 214, Washington, DC 20016-3627 | DC | 1983-05 | $327 |
| 7 | International Wildlife Conservation Society Inc | 3801 52nd St Nw, Washington, DC 20016 | DC | 1968-11 | $0 |
| 8 | International Womens Democracy Center | 1726 M Street Nw, Washington, DC 20036-4502 | DC | 1994-04 | $73,805 |
| 9 | International Womens Forum | 2120 L Sweet Nw Ste 460, Washington, DC 20037 | DC | 1987-08 | $2,812,700 |
| 10 | International Womens Media Foundation | 1726 M St Nw Suite 1002, Washington, DC 20036-4502 | DC | 1990-01 | $2,790,327 |
| 11 | International Youth Service And Development Corps Inc | 2909 Pennsylvania Ave Se, Washington, DC 20020-3836 | DC | 1996-03 | $0 |
| 12 | Internet Alliance Inc | 1615 L St Nw Ste 1100, Washington, DC 20036-5624 | DC | 1983-02 | $296,786 |
| 13 | Internet Commerce Coalition Inc | 500 8th St Nw, Washington, DC 20004-2131 | DC | 2003-01 | $390,031 |
| 14 | Internet Education Foundation | 1634 Eye Street Nw 11th Floor, Washington, DC 20006-4003 | DC | 1998-03 | $631,477 |
| 15 | Internet Innovation Alliance | PO BOX 19231, Washington, DC 20036-9231 | DC | 2004-10 | $2,400,110 |
| 16 | Interstages Inc | 7720 Alaska Ave Nw, Washington, DC 20012-1422 | DC | 2005-05 | $191,501 |
| 17 | Interstate Migrant Education Council | One Massachusetts Ave Nw, Washington, DC 20001-1401 | DC | 1999-07 | $447,072 |
| 18 | Interstate Natural Gas Association Of America | 20 F St Nw Ste 450, Washington, DC 20001-6704 | DC | 1946-04 | $13,420,459 |
| 19 | Intown Playgroup Inc | 1334 29th St Nw, Washington, DC 20007-3351 | DC | 2000-08 | $232,954 |
| 20 | Invest To Compete Alliance | 1010 Pennsylvania Ave Se, Washington, DC 20003 | DC | 1986-12 | $24,255 |
| 21 | Investigative Project On Terrorism Foundation | 5505 Connecticut Ave Nw Ste 341, Washington, DC 20015-2601 | DC | 2007-01 | $2,656,074 |
| 22 | Investing In Education Foundation | 2224 Observatory Place Nw, Washington, DC 20007 | DC | 2005-11 | $15,391 |
| 23 | Investment Adviser Association | Suite 725, Washington, DC 20036 | DC | 1948-12 | $3,126,580 |
| 24 | Investor Protection Tr, David L Kinnamon Ttee | 919 18th St Nw Ste 300, Washington, DC 20006-5526 | DC | 1995-04 | $14,089,325 |
| 25 | Investors Action Alliance | PO BOX 18363, Washington, DC 20036-8363 | DC | 2006-03 | $127,500 |
| 26 | Iodp Management International Inc, Imi | 1001 Connecticut Ave Nw Ste 715, Washington, DC 20036-5526 | DC | 2004-02 | $16,171,258 |
| 27 | Iona Senior Services | 4125 Albemarle St Nw, Washington, DC 20016-2105 | DC | 1975-07 | $3,621,419 |
| 28 | Ionia R Whipper Home Inc | 2000 Channing St Ne, Washington, DC 20018-1334 | DC | 1951-10 | $1,309,467 |
| 29 | Ipaa Educational Foundation | 1201 15th St Nw, Washington, DC 20005-2842 | DC | 1998-07 | $557,831 |
| 30 | Iran Policy Committee, Alban Towers | Alban Towers Suite 507, Washington, DC 20004 | DC | 2006-09 | $230,599 |
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