THE MONMOUTH LAND BRIEF
Land in the
Western Dissected Illinoian Till Plain setting.
Monmouth township has 36.8 square miles of land in Warren County. Its Census reference point is in Western Dissected Illinoian Till Plain, within Interior River Valleys and Hills.
Broad terraced river valleys contrast with wooded slopes and dissected glacial plains. Bottomland settings and upland oak landscapes occur close together across the Interior River Valleys and Hills.
Regional context: Interior River Valleys and Hills ↗ · Classification at the Census reference point
Monmouth and Warren County
Monmouth is associated with Warren County in the Census boundary data. Start with the parcel’s tax bill to match the property to that jurisdiction, then confirm which government handles its land use.
Monmouth by land and water
The Census records 0.12 square miles of water within Monmouth, or 0.3% of its total area. It is 0.2 percentage points higher than the 0.1% recorded for Warren County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Monmouth township has 8.7 times the land area of nearby Monmouth city (4.25 square miles). These areas describe boundaries, not comparable property prices.

