Property Atlas

County hazard profile

Nantucket, MA

Massachusetts · pop. 14,255 · FIPS 25019

Very Low
FEMA risk rating · RATING
Hurricane
dominant hazard
$23M
modeled expected annual loss/yr

Expected annual loss · all 3,232 U.S. counties

among the lowest nationally

national median $15M/yr Nantucket $23M

A real dollar distribution: most counties sit far below a handful of high-exposure ones. A FEMA model of annual loss, not a record of disasters.

FEMA national percentile scores

FEMA/CDC score each county 0–100 against all others — the score is the national rank (RATING). Higher risk and vulnerability are worse; higher resilience is better.

FEMA risk indexVery Low 38.68/100
national median ~50 lower than most counties (39th percentile)
Social vulnerabilityVery Low 10.62/100
national median ~50 among the lowest nationally
Community resilienceVery High 98.95/100
national median ~50 among the highest nationally

Recorded · NFIP flood claims RECORDED

Realized flood losses in Nantucket

The National Flood Insurance Program has paid 601 flood-insurance claims totaling $17.6M in Nantucket since 1978. The costliest year was 1991 ($5.4M paid).

Flood-insurance dollars paid by year of loss

1978: $508 paid 1979: $21,936 paid 1984: $0 paid 1987: $164,984 paid 1988: $170,600 paid 1989: $10,000 paid 1990: $338,827 paid 1991: $5,407,763 paid 1992: $1,669,825 paid 1993: $634,934 paid 1994: $21,496 paid 1995: $390,395 paid 1996: $253,673 paid 1997: $53,568 paid 1998: $478,827 paid 1999: $30,557 paid 2000: $1,771 paid 2001: $10,220 paid 2002: $255,983 paid 2003: $9,402 paid 2004: $5,383 paid 2005: $72,544 paid 2006: $65,579 paid 2007: $1,111,781 paid 2008: $126,000 paid 2009: $123,762 paid 2010: $642,231 paid 2011: $0 paid 2012: $372,545 paid 2013: $1,866,618 paid 2014: $101,235 paid 2015: $2,182,690 paid 2016: $5,917 paid 2017: $1,812 paid 2018: $915,204 paid 2019: $0 paid 2020: $4,791 paid 2021: $5,295 paid 2022: $30,542 paid 2023: $1,685 paid 1991 · $5.4M 1978 2023
$17.6M
total paid
$29,219
average claim
$286K
largest single claim
66%
in high-risk flood zones (A/V)

RECORDED — these are actual paid NFIP claims (a redacted census from OpenFEMA), not a model. They are the realized counterpart to the FEMA risk score above: one is what happened and got paid, the other is what a model predicts.

Scope: these are flood-insurance claims, so they undercount flooding where owners were uninsured — read this as "what NFIP paid here," not "every flood." County-level totals, not a per-property or per-address verdict. Verify a specific address and buy coverage at FloodSmart.gov; the underlying data is OpenFEMA NFIP Redacted Claims.

What these figures mean

  • RATING — the FEMA risk score, expected loss, social vulnerability, and resilience are FEMA/CDC models, not records of disasters that happened. The 0–100 scores are already national percentiles.
  • MEASURED — population is a recorded census figure.
  • COMPUTED — the county's rank within the dollar-loss distribution is our placement over the 3,232 counties.
  • CONTEXT — the note below is framing, not a measurement.

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What this is — and is not

This is FEMA/CDC modeled hazard exposure for Nantucket, MA and where it ranks among U.S. counties. It is not a verdict on whether Nantucket is a good or bad place to live — hazard exposure is not place quality, and a county can't opt out of its geography. It is not a per-property or per-address risk assessment, not a prediction of any specific disaster, and not insurance advice. For site-specific risk use a per-property assessment; for the underlying model see FEMA National Risk Index.