ZIP 08540
Mercer County, NJ

The heaviest year

2011 is the heaviest year on file: 71 paid claims, 26.3% of the ZIP's total. That one year accounts for more than a quarter of the ZIP's entire record. The largest named event in the record is Hurricane Irene, with 67 claims.

55 of those claims — 20.4% — were filed since 2017. The pattern here is still active.

Named event	Paid claims	Share of record
Hurricane Irene	67	24.8%
Hurricane Ida	41	15.2%
April 2007 Nor'easter	19	7.0%

Where the claims sat on the map

Of the 250 claims here that record a rated flood zone, 124 — 49.6% — were on properties rated outside the mapped high-risk area, in a B, C or X zone. Being outside the high-risk zone has not meant much here. Flood insurance is not required outside the high-risk zone, and most properties there do not carry it — so these counts come from the minority who did.

The water near this ZIP

The closest gauges publishing official flood thresholds are Stony Brook at Princeton (2.6 mi), Millstone River at Griggstown (5.6 mi) and Assunpink Creek at Clarksville (6.6 mi). A gauge describes one point on one river — it will not see street drainage, sewer backup, storm surge or flash flooding.

Read current gauge conditions for 08540 →

What this does not say

These are paid National Flood Insurance Program claims, nothing more. They count insured properties whose owners filed and were paid, so they are a floor on how often this ZIP has flooded — never a measure of how likely it is to flood next. Uninsured flooding leaves no trace here at all.

The figures are aggregates published by FEMA. No individual claim, address or policyholder appears on this page or in the data behind it. Nothing here is a forecast, a warning, or advice about insurance.