Ranking

Large US counties with the lowest natural disaster risk

Among the 142 counties with at least 500,000 people, these have the lowest overall risk scores in FEMA's National Risk Index.

Updated November 6, 2026 · By the Hazard Compass team

Photo: m01229, CC BY 2.0

If you want a big-county job market with fewer natural hazards, the Mid-Atlantic and parts of New England, the inland Northwest and the upper Midwest stand out. Among the 142 US counties with at least 500,000 residents, Anne Arundel County, Maryland, has the lowest overall risk score in FEMA’s National Risk Index.

No large county is free of risk. Big counties have more buildings and people, so all 142 score above the national middle. This list compares them with each other, not with small rural counties.

The 12 large counties with the lowest risk scores

Rank County Population Risk score Expected loss per resident Top two hazards
1 Anne Arundel County, MD 587,917 82 $127 Inland flooding, hurricanes
2 Bristol County, MA 578,698 90 $151 Inland flooding, hurricanes
3 Spokane County, WA 538,806 90 $183 Inland flooding, cold waves
4 Williamson County, TX 608,015 90 $225 Inland flooding, cold waves
5 Plymouth County, MA 530,320 90 $216 Inland flooding, coastal flooding
6 Adams County, CO 519,291 91 $252 Hail, inland flooding
7 Summit County, OH 540,333 91 $189 Inland flooding, hail
8 Montgomery County, MD 1,061,279 92 $119 Inland flooding, hurricanes
9 Chester County, PA 534,152 92 $323 Inland flooding, heat waves
10 Norfolk County, MA 725,648 92 $202 Inland flooding, hurricanes
11 Kent County, MI 657,870 92 $224 Inland flooding, tornadoes
12 Clark County, WA 503,148 92 $313 Inland flooding, earthquakes

Risk score is a percentile among all US counties (100 = highest). All 12 are rated “Relatively Moderate” overall. Source: FEMA National Risk Index, December 2025.

Why these counties score low

Most of these counties share three things:

  • No major hurricane landfall zone. Maryland and Massachusetts get hurricane remnants, but rarely the direct hits that drive losses in Florida, Texas and Louisiana.
  • Limited wildfire and earthquake exposure. Western counties on the list, like Spokane and Clark in Washington, have some of both, but far less than coastal California.
  • Strong local resilience. Several of these counties score well on FEMA’s resilience measure, which lowers the overall score.

Low score, but not no risk

Inland flooding is the top or second hazard in 11 of the 12. That matches the country as a whole: flooding is the costliest hazard in about 7 out of 10 US counties. Even in a low-risk county, a home near a creek or in a low spot can flood.

Montgomery County, Maryland, has the lowest expected loss per resident on the list, about $119 a year, yet it has still been included in 19 federal disaster or emergency declarations for natural events, mostly for storms, snow and flooding.

How we picked them

We took every county with at least 500,000 people in FEMA’s data and sorted by the overall National Risk Index score. The score combines expected yearly losses with how vulnerable residents are and how resilient the community is.

Per-resident loss is shown so you can compare counties of different sizes. Each county name links to its full page, with every hazard, the disaster history and flood insurance numbers.

Questions people ask

What is the lowest-risk county in the US overall? Small, inland, lightly populated counties score lowest, mostly in the Great Plains and the interior West. Our state pages list the lowest-risk counties in each state.

Is Anne Arundel County safe from hurricanes? No. It sits on Chesapeake Bay and gets tropical storm remnants and some storm surge. Its expected losses are simply low compared with other large counties.

Does a low-risk county mean cheaper insurance? Often, but not always. Insurance prices depend on your home, its location within the county and the insurer.

This page shares public data for comparison and is not advice. This site is independent and is not part of FEMA or any government agency.

Figures come from the FEMA National Risk Index (December 2025), OpenFEMA disaster declarations and NFIP records. This article is general information, not insurance or legal advice. Spot an error?