THE JEFFERSON COUNTY LAND BRIEF
Land in the
Crystalline Mid-Elevation Forests setting.
Jefferson County has 764.4 square miles of land in Colorado. 5 mapped landscape regions meet across Jefferson County: Crystalline Mid-Elevation Forests, Front Range Fans, Foothill Shrublands, among others.
Steep mountains rise through distinct vegetation bands, from lower grass and shrub country to conifers and alpine terrain. Elevation is a defining difference across Southern Rocky Mountain landscapes.
Regional context: Southern Rockies ↗ · Regional mapping across the county footprint
Where the landscape changes
Jefferson County intersects 5 mapped regional units. The largest mapped shares are:
- Crystalline Mid-Elevation Forests56.9%
- Front Range Fans18.8%
- Foothill Shrublands12%
- Flat to Rolling Plains6.4%
- Crystalline Subalpine Forests5.9%
High Plains in Jefferson County
Broad, comparatively smooth plains distinguish the High Plains from neighboring broken terrain. The natural grassland setting is drier and higher than the Central Great Plains to the east.
Read the regional source ↗Finding your parcel within Jefferson County
The atlas lists 27 cities, towns, townships, and Census communities associated with Jefferson County, including Lakewood, Arvada, Westminster. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Jefferson County by land and water
The Census records 9.64 square miles of water within Jefferson County, or 1.2% of its total area. That share is close to Jefferson County’s 1.2%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Jefferson County has 140.9 times the land area of nearby Indian Hills CDP (5.43 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Adams County, Arapahoe County, Boulder County, Broomfield County, Clear Creek County, Denver County, Douglas County, Gilpin County and other counties within Colorado. A tract near one of these lines should be matched to the county identifier on its own records.

