Colorado · FIPS 08013 · County seat: Boulder
Boulder County, CO GIS & Parcel Viewer
Looking for lot lines or a parcel number in Boulder County, CO? The quickest route is PropertySearch for Boulder County, the county parcel map we keep on file for this county. We link straight to it and add a few tips for getting around.
Open the Boulder County parcel map ↗
Opens maps.bouldercounty.org in a new tab. We link out and never embed or copy parcel data.
Boulder County at a glance
| Official map | PropertySearch for Boulder County |
|---|---|
| Type | County-run map |
| Website | maps.bouldercounty.org |
| Access | Free, no login (checked Oct 2026) |
| County seat | Boulder |
| Population | 326,831 (2023 Census Bureau estimate) |
| Land area | 726 sq mi |
| FIPS code | 08013 |
Who runs this map
Boulder County runs this viewer (directly or through a contracted vendor), which makes it the closest thing to the source for local parcel lines. As of our October 2026 test, anyone could open it without signing in or paying.
Searching for a parcel, step by step
- Press the button above to open the county's own web map.
- Search for the property or pan and zoom to it.
- Click the lot to bring up what the county publishes about it.
- Look for print or measure tools if you need a quick map or rough size.
Have a tax bill handy? The parcel or account number on it is usually the fastest way to search.
About Boulder County
Boulder County had an estimated 326,831 residents in 2023, according to the Census Bureau. With about 726 square miles of land, that works out to roughly 450 people per square mile. That makes it number 9 out of 64 Colorado counties by population. The county seat is Boulder.
Neighboring counties
Parcels close to the edge of Boulder County can fall in the next county over. Neighboring counties:
More on Boulder County parcel maps
Before you rely on the lines
Online parcel lines are drawn for tax and planning use. They can be off by several feet, so use a recorded plat or a licensed surveyor for fences, setbacks or a sale.