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US ZIP Code Profile

ZIP Code 77511
Alvin, Texas

ZIP code 77511 is in Alvin, located in Brazoria County, Texas, within the Houston-The Woodlands-Sugar Land metro area. Its 2020 Census population was 51,093. The estimated median adjusted gross income per tax return is $45,744, and about 4% of filers report $200,000 or more.

2020 Population
51,093
Census ZCTA
County
Brazoria
FIPS 48039
Median income (est.)
$45,744
IRS SOI 2022
Land Area
158.55 mi²
+ 1.376 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CityAlvin, TX
CountyBrazoria County (FIPS 48039)
StateTexas (FIPS 48)
Metro Area (MSA)Houston-The Woodlands-Sugar Land, TX Metro Area (26420)
Census Region / DivisionSouth Region · West South Central Division
Coordinates29.380857, -95.24186
Land / Water Area158.55 mi² land · 1.376 mi² water

02Income & Economics

Distribution of the 22,740 individual tax returns filed in 77511 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
29.6%
$25K–$50K
24.5%
$50K–$75K
14.8%
$75K–$100K
9.9%
$100K–$200K
17.2%
$200K+
3.9%
The $200,000+ bracket accounts for 19% of 77511's total adjusted gross income, from 4% of returns — a concentration that drives the gap between the median ($45,744) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 77511's IRS income metrics, 2020–2022.

Median income (2021→2022)
$45,744
▲ 5.6%
Filers earning $200K+
3.9%
▲ 0.7 pt
Total filers
22,740
▲ 2.2%
GET /zipc/v2/zipcodes/77511/soi?year=… $41K 2020 $43K 2021 $46K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 77511 ZCTA.

2000
42,621
 
2010
46,627
▲ +9.4%
2020
51,093
▲ +9.6%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number480215
City AliasesAlvin

06Frequently Asked Questions

What county is ZIP code 77511 in?

ZIP code 77511 is in Brazoria County, Texas (county FIPS code 48039).

What city is ZIP code 77511?

The primary USPS city for 77511 is Alvin, TX.

What metro area (MSA) is 77511 in?

77511 is part of the Houston-The Woodlands-Sugar Land, TX Metro Area (MSA code 26420).

What is the population of ZIP code 77511?

The 2020 Census population of 77511 was 51,093 residents.

What is the median income in ZIP code 77511?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 77511 is about $45,744, with around 4% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.