How much flood risk does Washington County actually carry?
Washington County lands at the 15.6th percentile of FEMA's National Risk Index for flooding, "Very Low" territory — among the lowest flood hazard in the country — with the hazard driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about once every 1 years. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Who actually carries the flood insurance FEMA requires
Washington County is one of the counties where FEMA's own denominator for mandated flood-zone structures is missing, so no compliance rate is shown rather than a guessed one — the data quality guide covers how common this is. Across all residential structures in Washington County, not just the ones FEMA mandates, 0% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
How Washington County compares nationally
Washington County sits at rank 2684 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 2835 of 3144 by population (1 is biggest). Washington County, Colorado is home to about 4,771 people across 2,518.084 square miles of land.
Your street may differ from Washington County's average
FEMA counts 2,226 residential structures in Washington County overall, 1 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Washington County's numbers. See the data quality guide for why Washington County, like hundreds of other counties, doesn't get a clean compliance percentage.