Which county in Colorado has the lowest flood risk?

Broomfield has the lowest flood risk in Colorado, at 13.9.

What is the flood risk in Broomfield?

Broomfield is ranked #1 in Colorado for flood risk, at 13.9.

What are the top counties in Colorado for flood risk?

Broomfield (13.9), then Teller (22.3), and Adams (24.4). The full top 25 is in the table on this page.

How is this flood risk ranking calculated?

Counties in Colorado are ranked by flood risk (FEMA National Risk Index, FEMA NRI v1.20), lowest first. Values describe the county, not an individual property. Source vintage is shown on the page.

How does Colorado compare to the rest of the US for flood risk?

This list is Colorado only. See the national ranking of the lowest counties for flood risk at hearthmap.app/best/lowest-flood-risk.

Lowest Flood Risk Counties in Colorado (2026)

Lowest counties for flood risk in Colorado

Top 25 of 64 counties with data.

Ranked by flood risk (FEMA National Risk Index, FEMA NRI v1.20), lowest first.

Lowest counties for flood risk in Colorado

Rank	County	Value
01	Broomfield13.9 County page
02	Teller22.3 County page
03	Adams24.4 County page
04	Pueblo25.9 County page
05	Arapahoe27.4 County page
06	Jefferson35.1 County page
07	Baca35.3 County page
08	Denver36.6 County page
09	Douglas38.6 County page
10	Larimer39.4 County page
11	Crowley40.1 County page
12	Lake41.1 County page
13	Weld43.0 County page
14	Park43.0 County page
15	El Paso43.3 County page
16	Boulder52.5 County page
17	Mesa54.1 County page
18	Montezuma54.2 County page
19	Elbert54.4 County page
20	Las Animas55.5 County page
21	Bent59.3 County page
22	Sedgwick60.1 County page
23	Cheyenne64.7 County page
24	Phillips64.8 County page
25	San Miguel64.8 County page

How this ranking works

This page ranks Colorado counties by flood risk, sorted so the lowest places appear first. Click any county to see its housing, schools, crime, and demographics in detail.

For flood risk, a lower value is generally more favorable, so the top of the list is the lowest. Want to weigh flood risk against schools, taxes, commute, and more at once? Use the live map to build a custom match.

Data comes from public sources. Source attribution and the exact data vintage are shown above and on the full map of flood risk.

Frequently asked questions

Which county in Colorado has the lowest flood risk?: Broomfield has the lowest flood risk in Colorado, at 13.9.
What is the flood risk in Broomfield?: Broomfield is ranked #1 in Colorado for flood risk, at 13.9.
What are the top counties in Colorado for flood risk?: Broomfield (13.9), then Teller (22.3), and Adams (24.4). The full top 25 is in the table on this page.
How is this flood risk ranking calculated?: Counties in Colorado are ranked by flood risk (FEMA National Risk Index, FEMA NRI v1.20), lowest first. Values describe the county, not an individual property. Source vintage is shown on the page.
How does Colorado compare to the rest of the US for flood risk?: This list is Colorado only. See the national ranking of the lowest counties for flood risk at hearthmap.app/best/lowest-flood-risk.