THE BOULDER LAND BRIEF
Land in the
Townsend Basin setting.
Boulder city has 1.12 square miles of land in Jefferson County. Its Census reference point is in Townsend Basin, within Middle Rockies.
Forested mountain ranges rise above grassy or shrubby intermountain valleys. The Middle Rockies combine alpine high country, partly wooded foothills and valleys supplied by mountain streams.
Regional context: Middle Rockies ↗ · Classification at the Census reference point
Boulder and Jefferson County
Boulder is associated with Jefferson 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.
Boulder by land and water
The Census records 0 square miles of water within Boulder, or 0% of its total area. It is 0.1 percentage points lower than the 0.1% recorded for Jefferson County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Boulder city has 8.8% of the land area of nearby Basin CDP (12.7 square miles). These areas describe boundaries, not comparable property prices.

