There is really no mountain in Oslo 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 | NA | 620 | Porthøgda | 220 | 1815-II, | TBD |
| 2 | NA | 533 | Tryvasshøgda | 180 | 1814-I, | TBD |
| 3 | NA | 569 | Heikampen | 160 | 1815-II, | TBD |
| ***** | **** | **** **** | **** **** | ********** | ********* | |