| Business | Phone |
| Bisconti Research Inc 2610 Woodley Pl Nw, Washington 20008 | (202) 347-8820 |
| Decision Research 4301 Connecticut Ave Nw # 436, Washington 20008 | (202) 362-7077 |
| Direct Organizing Group 1633 Q St Nw, Washington 20009 | (202) 483-8322 |
| Fingerhut Powers & Assoc 1925 K St Nw # 250, Washington 20006 | (202) 331-3700 |
| Ipsos Public Affairs 1101 Connecticut Ave Nw, Washington 20036 | (202) 463-7300 |
| Mason Dixon Research Inc 2000 L St Nw, Washington 20036 | (202) 548-2680 |
| Middle East Insight 733 15th St Nw, Washington 20005 | (202) 737-6466 |
| National Opinion Research Ctr 1350 Connecticut Ave Nw # 500, Washington 20036 | (202) 223-6040 |
| Opinion Dynamics Corp 1501 M St Nw, Washington 20005 | (202) 347-3344 |
| Princeton Survey Research 1211 Connecticut Ave Nw, Washington 20036 | (202) 293-4710 |
| Qev Analytics 410 Constitution Ave Ne, Washington 20002 | (202) 546-8464 |