Residential delivery area · Texas
ZIP Code 77521: Baytown, TX
ZIP code 77521 uses the postal name Baytown, Texas and lies mostly in Harris County (77% of its land) with the rest in Chambers County (Census 2020 ZIP-county file). About 69,000 people live there (Census Bureau, ACS 2020-2024), the most populous of Baytown's 3 residential ZIP codes. Median household income is $73,629 (Census Bureau, ACS 2020-2024). By Census place, 35% of its land lies in Baytown, and 2% in smaller places; 63% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Baytown · 3 residential ZIPs
- County
- Harris County (77%); Chambers County (23%)
- Census places
- Baytown
- Metro area
- Houston-Pasadena-The Woodlands, TX
- House districts
- TX-36 (88%), TX-2 (12%) 119th Congress, by share of land
- State
- Texas
- Time zone
- Central
- Land area
- 49.3 sq mi · 1,401 people per sq mi
- PO Box ZIPs
- 77522 also use the name Baytown
Where is ZIP code 77521?
77521 centers on 29.812°, -94.963° and covers 49.3 square miles of land plus 0.9 of water. It borders 5 ZIP codes: 77520, 77562, 77523, 77532, 77535.
The map draws ZIP code areas only. For the streets inside 77521, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 77521 compare with the rest of Baytown?
| Measure | 77521 | In Baytown | In Harris County | In TX |
|---|---|---|---|---|
| People (ACS 2020-2024) | 69,038 | 1st of 3 | 15th of 142 | 56th of 1,990 |
| Median household income | $74k | 2nd of 3 | 68th of 137 | 564th of 1,172 |
| Median home value | $231k | 2nd of 3 | 85th of 136 | 612th of 1,172 |
Its median household income is higher than in 53% of U.S. residential ZIP codes, and it is denser than 81% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 77521?
The 2020 Census counted 65,058 people in 77521; the ACS, which samples households over 2020-2024, estimates 69,038. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 69,038
- 2020 Census count
- 65,058
- Households
- 24,321
- Median age
- 32.9
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 77521?
Of the 69,038 people the ACS estimates in 77521, 28.0% are under 18 and 10.3% are 65 or older. The largest group by race and Hispanic origin is Hispanic or Latino (52.8%), then White (not Hispanic) (25.5%).
- Under 1828.0%
- 18 to 6461.7%
- 65 and older10.3%
- Hispanic or Latino52.8%
- White, not Hispanic25.5%
- Black, not Hispanic15.4%
- Other or two or more3.9%
- Asian, not Hispanic2.4%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 77521 earn?
Median household income is $73,629 (ACS 2020-2024), the 68th highest of the 137 ranked ZIP codes in Harris County.
- Median household income
- $73,629
- Income per person
- $32,886
- Below the poverty line
- 15.4%
- Unemployed (of the labor force)
- 9.7%
- Adults 25+ with a bachelor's degree
- 16.9%
- Adjusted gross income per tax return, 2022
- $63,74529,110 returns; wages 84% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 77521?
FHFA's house price index for 77521, built from repeat sales and appraisals of the same homes, rose 90% from 2015 to 2025 and rose 41% from 2020 to 2025, and moved −6.5% in 2025.
- Median home value (owners' estimate)
- $231,400
- Median gross rent
- $1,390
- Homes owned by their occupants
- 58.2%
- Housing units
- 25,879
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 77521?
908 business establishments had a location in this ZIP code in 2023, 55 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance170
- Retail trade166
- Accommodation and food services119
- Other services (except public administration)94
- Finance and insurance67
- Professional, scientific, and technical services61
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 77521?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 77520 | Baytown | 36,355 | $54k | 5.7 mi |
| 77562 | Highlands | 8,914 | $57k | 5.6 mi |
| 77523 | Baytown | 30,186 | $124k | 6.6 mi |
| 77532 | Crosby | 33,780 | $92k | 10.1 mi |
| 77535 | Dayton | 39,504 | $85k | 17.0 mi |
| 77580 | Mont Belvieu | 0 | – | 6.2 mi (near) |
| 77530 | Channelview | 31,527 | $62k | 9.2 mi (near) |
| 77571 | La Porte | 38,543 | $82k | 10.2 mi (near) |
| 77049 | Houston | 40,418 | $63k | 11.2 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.