1850 Atlas
| Name | What | Place | Pop | Other |
| Oakachickma | PO | Yallabusha Co, MS | ||
| Oakdale | PV, CH | Shelby Co, MO | seat of justice | |
| Oakdale | PO | Worcester Co, MA | ||
| Oakdam | PO | Vanderburgh Co, IN | ||
| Oakfield | PO | Genesee Co, NY | ||
| Oakfield | PO | Fond du Lac Co, WI | ||
| Oakfield | PO | Perry Co, OH | ||
| Oakfield | PO | Kent Co, MI | ||
| Oakfield | PO | Franklin Co, MO | ||
| Oakfusky | PO | Randolph Co, AL | ||
| Oakham | PT | Worcester Co, MA | water by Five Mile & Ware rivers | |
| Oakland | PV | Portage twp, Livingston Co, NY | water by Cashaqua creek | |
| Oakland | PO | Armstrong Co, PA | ||
| Oakland | PO | Morgan Co, VA | ||
| Oakland | PO | Clinton Co, OH | ||
| Oakland | PV | Fayette Co, TN | ||
| Oakland | PO | Coles Co, IL | ||
| Oakland | PO | Yallabusha Co, MS | ||
| Oakland | PT | Oakland Co, MI | 978 | water by Paint creek & a brnach of Stony creek |
| Oakland | PO | La Clede Co, MO | situated on the Osage fork of Gasconade river | |
| Oakland | PO | St Francis Co, AR | ||
| Oakland | PO | Christian Co, KY | ||
| Oakland | PO | Chatham Co, NC | ||
| Oakland | PO | Spencer Co, IN | ||
| Oakland | PO | La Vava Co, TX | ||
| Oakland | PO | Edgefield dist, SC | ||
| Oakland | PO | Jefferson Co, WI | ||
| Oakland | PO | Lauderdale Co, AL | ||
| Oakland City | PT | Contra Costa Co, CA | ||
| Oakland College | PV | Claiborne Co, MS | seat of Oakland College | |
| Oakland Grove | PO | Prairie Co, AR | ||
| Oakland Mills | PV | Juniata Co, PA | ||
| Oakley | PO | Mecklenburgh Co, VA | ||
| Oakley | PO | Overton Co, TN | ||
| Oakley | PO | Macon Co, IL | ||
| Oakley | PO | Lewis Co, MO | ||
| Oakly | PO | Franklin parish, LA | ||
| Oakmulgee | PO | Bedford Co, VA | ||
| Oakohay | PO | Covington Co, MS | ||
| Oaksville | PV | Otsego twp, Otsego Co, NY | water by Oak creek | |
| Oaktibbeha | PO | Kemper Co, MS | ||
| Oakville | PV | Buckingham Co, VA | ||
| Oakville | PV | Mecklenburgh Co, NC | ||
| Oakville | PV | Lexington dist, SC | ||
| Oakville | PO | Lawrence Co, AL | ||
| Oakville | PV | London twp, Monroe Co, MI | ||
| Oakville | PV | St Louis Co, MO | ||
| Oakville | PO | Madison Co, TN | ||
| Oakville | PO | St Mary's Co, MD | ||
| Oakville | PO | Union Co, NC | ||
| Oakville | PO | Cumberland Co, PA | ||
| Oakville | PO | Appomatox Co, VA |