There is really no mountain in Østfold that qualifies as being "Major" A few of the most prominent hills are (will be) listed below.
| Local Rank | Norway Rank | Height | Name | Primary factor | Map | Location (UTM) |
| 1 | xxx | 325 | Linnekleppen | 177 | 2013-IV | 32 646793 +6583573 |
| 2 | xxx | 336 | Slavasshøgda | 123 | tbd. | tbd. |
| ***** | **** | **** **** | **** **** | ********** | ********* | |