| List Rank | IL Rank | Name | Elevation | Saddle | Prominence | Line Parent | Isolation | Proximate Parent | County | Quadrangle | LiDAR |
| Mason County HP | 735' | 562' | 173' | Hillsdale County HP | 76.66 | Bureau County HP | Mason | Easton - Map | |||
| Buxtom Hill | 682' | 572' | 110' | Hillsdale County HP | 65.86 | Bureau County HP | Mason | Natrona - Map | |||
| Red Oak Ridge | 552' | 507' | 45' | Hillsdale County HP | 67.19 | Bureau County HP | Mason | Forest City - Map | |||
| Hickory Grove Hill | 505' | 472' | 33' | Hillsdale County HP | 57.00 | Bureau County HP | Mason | South Pekin - Map |