| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Orlingbury | city | Northamptonshire | United Kingdom | 52.33 | -0.73 | 252 | 40646 |
| Oundle | city | Northamptonshire | United Kingdom | 52.48 | -0.47 | 134 | 7599 |
| Overstone | city | Northamptonshire | United Kingdom | 52.28 | -0.82 | 265 | 84818 |
| Oxendon | city | Northamptonshire | United Kingdom | 52.43 | -0.92 | 347 | 5994 |