FloodMaps
Map of FEMA flood zones in 77591Tap the map to explore

ZIP code · Flood risk

Check any address in 77591

Quick facts

In FEMA's 100-year zone

1%

50 of 5,213 single-family homes

Ground height

13 to 20 ft

Above sea level, for most homes in the ZIP

FEMA aid after Harvey

3,387 requests

1,504 grants, median $1,050

Nearest creek or channel

0.2 mi

Typical distance from a home

77591 and Galveston County

ZIP 77591's figures beside Galveston County's
77591Galveston County
Single-family homes5,213117,997
In the 100-year zone1%33%
Typical ground height17 ft16 ft
Typical distance to a creek0.2 mi0.2 mi

Frequently asked questions

Is 77591 in a flood zone?

50 of the 5,213 single-family homes in 77591 sit in FEMA's 100-year zone, or 1%. That is less than half the Galveston County share of 33%.

Will the new flood map change 77591?

Galveston County has no draft map we track, so the zones on this page are FEMA's current map, which sets flood insurance requirements.

Did 77591 flood in Hurricane Harvey?

FEMA took 3,387 aid requests from the ZIP after the storm and made 1,504 grants, with a median of $1,050. A FloodMaps report shows a single address's Harvey record.

How do I check a home in 77591?

Search the address above for a free check of its FEMA flood zone 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.

77591 has 5,213 single-family homes on the county appraisal roll. Most sit between 13 and 20 ft above sea level, and the typical home is 0.2 mi from the nearest creek or drainage channel. 50 of them (1%) are in FEMA's 100-year zone today. Galveston County has no draft map we track, so FEMA's current map sets flood insurance requirements here.

Next door, 77539 has 46% of its single-family homes in the zone and 77590 has 3%. After Hurricane Harvey, FEMA took 3,387 aid requests from the ZIP and made 1,504 grants.

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 as it stood on October 13, 2026. FEMA aid is Individual Assistance requests and grants after Harvey, by ZIP.

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