Matanuska-Susitna Borough, AK flood risk explained
Flood hazard in Matanuska-Susitna Borough sits at the 51.3th national percentile, below the national norm for flood hazard; driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about once every 100 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
Homes with a federally backed mortgage inside Matanuska-Susitna Borough's mapped high-risk flood zone (the Special Flood Hazard Area, or SFHA) are legally required to carry an NFIP flood policy. In practice, 22.6% of them do — 120 active policies against 532 structures FEMA counts in that zone, leaving a real compliance gap. Looking beyond the mandated zone, 0.4% of all residential structures in Matanuska-Susitna Borough carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
How Matanuska-Susitna Borough compares nationally
Among the 3144 US counties FEMA scores for flood hazard, Matanuska-Susitna Borough ranks 1596 — 1 being the highest hazard nationally — and 542 by population among all 3144 counties covered here, where 1 is the largest. Matanuska-Susitna Borough, Alaska is home to about 117,613 people across 24,707.115 square miles of land.
Checking a specific address in Matanuska-Susitna Borough
FEMA counts 44,206 residential structures in Matanuska-Susitna Borough overall, 195 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
Where Matanuska-Susitna Borough's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. If you're unsure why any of this insurance requirement exists at all, the SFHA explainer covers it from first principles.