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Map of FEMA flood zones in 77521Tap the map to explore

ZIP code · Flood risk

Check any address in 77521

Quick facts

In FEMA's 100-year zone

2%

396 of 16,033 single-family homes

Draft 2026 flood map

827 in, 68 out

Single-family homes moving into or out of the 100-year zone

Ground height

22 to 41 ft

Above sea level, for most homes in the ZIP

Harvey, 2017

At least 1,869 homes

In FEMA's Harvey damage model

FEMA aid after Harvey

7,536 requests

3,373 grants, median $2,094

Nearest bayou or channel

0.2 mi

Typical distance from a home

77521 and Harris County

ZIP 77521's figures beside Harris County's
77521Harris County
Single-family homes16,0331,154,353
In the 100-year zone2%8%
On the draft 2026 map7%11%
Moving into the zone82767,353

Frequently asked questions

Is 77521 in a flood zone?

396 of the 16,033 single-family homes in 77521 sit in FEMA's 100-year zone, or 2%. That is less than half the Harris County share of 8%.

Will the new flood map change 77521?

Harris County's draft 2026 map moves 827 single-family homes in 77521 into the 100-year zone and 68 out of it. It's a draft, not FEMA's map, so today's zones set insurance requirements until FEMA adopts a new one.

Did 77521 flood in Hurricane Harvey?

At least 1,869 single-family homes in 77521 are among the damaged in FEMA's Harvey model. FEMA also took 7,536 aid requests from the ZIP after the storm and made 3,373 grants, with a median of $2,094. A FloodMaps report shows a single address's Harvey record.

How do I check a home in 77521?

Search the address above for a free check of its FEMA flood zone, its zone on the draft 2026 map, and its ground height. For the full picture, including Harvey records, flood depth modeling, and an AI summary written from the home's own data, upgrade to a Premium Report starting at $7.

77521 has 16,033 single-family homes on the Harris County appraisal roll. Most sit between 22 and 41 ft above sea level, and the typical home is 0.2 mi from the nearest bayou or drainage channel. On Harris County's draft 2026 map, 827 single-family homes move into the 100-year zone and 68 move out, which would put 7% of the ZIP in the zone, against 2% today. Until FEMA adopts the draft, today's map decides who must carry flood insurance.

Next door, 77562 has 16% of its single-family homes in the zone and 77532 has 3%. FEMA's Harvey damage model counts at least 1,869 single-family homes here as damaged, and FEMA took 7,536 aid requests from the ZIP after the storm.

Compiled by FloodMaps from FEMA and county records. Flood-zone counts are single-family homes on the county appraisal rolls, placed on FEMA's flood map and Harris County's draft 2026 map as they stood on October 13, 2026. Harvey damage is FEMA's modeled damage for the 2017 storm, with each home counted once. FEMA aid is Individual Assistance requests and grants after Harvey, by ZIP.

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