Which county in Arizona has the lowest flood risk?

Yuma has the lowest flood risk in Arizona, at 46.4.

What is the flood risk in Yuma?

Yuma is ranked #1 in Arizona for flood risk, at 46.4.

What are the top counties in Arizona for flood risk?

Yuma (46.4), then Navajo (59.5), and Maricopa (68.7). The full top 15 is in the table on this page.

How is this flood risk ranking calculated?

Counties in Arizona 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 Arizona compare to the rest of the US for flood risk?

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

Lowest Flood Risk Counties in Arizona (2026)

Lowest counties for flood risk in Arizona

Top 15 of 15 counties with data.

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

Lowest counties for flood risk in Arizona

Rank	County	Value
01	Yuma46.4 County page
02	Navajo59.5 County page
03	Maricopa68.7 County page
04	Yavapai69.0 County page
05	Pinal69.2 County page
06	Apache72.0 County page
07	Mohave72.8 County page
08	Pima74.5 County page
09	Greenlee75.2 County page
10	Graham79.7 County page
11	Cochise80.3 County page
12	La Paz82.6 County page
13	Santa Cruz83.0 County page
14	Coconino86.7 County page
15	Gila94.1 County page

How this ranking works

This page ranks Arizona 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 Arizona has the lowest flood risk?: Yuma has the lowest flood risk in Arizona, at 46.4.
What is the flood risk in Yuma?: Yuma is ranked #1 in Arizona for flood risk, at 46.4.
What are the top counties in Arizona for flood risk?: Yuma (46.4), then Navajo (59.5), and Maricopa (68.7). The full top 15 is in the table on this page.
How is this flood risk ranking calculated?: Counties in Arizona 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 Arizona compare to the rest of the US for flood risk?: This list is Arizona only. See the national ranking of the lowest counties for flood risk at hearthmap.app/best/lowest-flood-risk.