| Site | State | Type | Population |
|---|---|---|---|
| Onida, SD | South Dakota | City | 668 |
| Onondaga County, NY | New York | County | 479363 |
| Onslow County, NC | North Carolina | County | 206160 |
| Ontario County, NY | New York | County | 113817 |
| Ontario, CA | California | City | 177963 |
| Ontario, NY | New York | City | 10470 |
| Ontario, OR | Oregon | City | 11626 |
| Ooltewah, TN | Tennessee | City | 744 |
| Opelika, AL | Alabama | City | 31538 |
| Orange County, CA | California | County | 3186989 |
| Orange County, FL | Florida | County | 1429908 |
| Orange County, NY | New York | County | 401310 |
| Orange Park, FL | Florida | City | 8705 |
| Orange, NJ | New Jersey | City | 30658 |
| Orange, OH | Ohio | City | 3428 |
| Orangeburg County, SC | South Carolina | County | 82962 |
| Orangeburg, SC | South Carolina | City | 12482 |
| Oregon City, OR | Oregon | City | 37411 |
| Orem, UT | Utah | City | 98129 |
| Orland Hills, IL | Illinois | City | 7069 |
| Orlando, FL | Florida | City | 307573 |
| Osage County, KS | Kansas | County | 15768 |
| Osceola County, FL | Florida | County | 388656 |
| Osceola, IA | Iowa | City | 5536 |
| Oshkosh, WI | Wisconsin | City | 66607 |
| Oswego, NY | New York | City | 16555 |
| Othello, WA | Washington | City | 8241 |
| Otsego County, MI | Michigan | County | 25289 |
| Otsego, MN | Minnesota | City | 21401 |
| Ottawa County, OH | Ohio | County | 40104 |
| Ottawa County, OK | Oklahoma | County | 32236 |
| Ottawa, IL | Illinois | City | 18742 |
| Ottawa, OH | Ohio | City | 4411 |
| Ouachita Parish, LA | Louisiana | County | 158768 |
| Ouray County, CO | Colorado | County | 5035 |
| Outagamie County, WI | Wisconsin | County | 191545 |
| Overland Park, KS | Kansas | City | 197106 |
| Oviedo, FL | Florida | City | 40059 |
| Owatonna, MN | Minnesota | City | 26398 |
| Owings Mills, MD | Maryland | City | 34711 |
| Oxford County, ME | Maine | County | 57741 |
| Oxford, ME | Maine | City | 4229 |
| Oxford, MS | Mississippi | City | 26430 |
| Oxford, NE | Nebraska | City | 770 |
| Oxnard, CA | California | City | 201879 |
| Oxon Hill-Glassmanor, MD | Maryland | City | 18049 |
| Paducah, KY | Kentucky | City | 26278 |
| Painesville, OH | Ohio | City | 20591 |
| Pajaro, CA | California | City | 3509 |
Demand Forum is powered by the National Center on Sexual Exploitation (NCOSE) and directed by Dr. Michael Shively, NCOSE's Senior Advisor on Research and Data Analysis. It was originally developed by Dr. Shively and Abt Associates with grant support from the National Institute of Justice. In January 2020 the website transferred to NCOSE. In January 2021, work began on a new grant from NIJ (#2020-75-CX-0011) to update and expand the content presented on Demand Forum.