List of rivers of the United States: O

A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - XYZ

This is a list of rivers in the United States that have names starting with the letter O. For the main page, which includes links to listings by state, see List of rivers in the United States.

Oa - Oc Oak Grove Fork Clackamas River - Oregon Oak Orchard River - New York Oatka Creek - New York Obed River - Tennessee Obey River - Tennessee Obion River - Tennessee Occoquan River - Virginia Ocheyedan River - Iowa, Minnesota Ochlockonee River - Georgia, Florida Ocklawaha River - Florida Ocmulgee River - Georgia Ocoee River - Tennessee Oconee River - Georgia Oconomowoc River - Wisconsin Oconto River - Wisconsin Octoraro Creek - Pennsylvania, Maryland

Og - Om Ogden River - Utah Ogeechee River - Georgia Ohio Brush Creek - Ohio Ohio River - Pennsylvania, Ohio, West Virginia, Kentucky, Indiana, Illinois Ohoopee River - Georgia Oil Creek - New York, Pennsylvania Okanogan River - Washington Old River - California Old River - Louisiana Old River - New Hampshire Olentangy River - Ohio Oleta River - Florida Ompompanoosuc River - Vermont

On - Os One Hundred and Two River - Iowa, Missouri Oneida River - New York Onion River - Wisconsin (tributary of Lake Superior) Onion River - Wisconsin (tributary of Sheboygan River) Ontonagon River - Michigan Oolenoy River - South Carolina Oostanaula River - Georgia Opequon Creek - Virginia, West Virginia Oriskany Creek - New York Osage River - Missouri Oso Flaco Creek - California Ossipee River - New Hampshire, Maine Oswegatchie River - New York Oswego River - New Jersey Oswego River - New York

Ot - Oy Otay River - California Otselic River - New York Ottauquechee River - Vermont Ottawa River - Ohio (tributary of Auglaize River) Ottawa River - Ohio, Michigan (tributary of Lake Erie) Otter Creek - Vermont Otter Tail River - Minnesota Ouachita River - Arkansas, Louisiana Ounce River - Wisconsin Owens River - California Owyhee River - Nevada, Idaho, Oregon Oyster River - Connecticut Oyster River - New Hampshire Oyster Pond River - Massachusetts