77021 ZIP Code, Houston, TX
77021 is a ZIP code in Houston, Texas in Harris County. It covers 6.1 square miles of land, centered about 4.4 miles south of downtown Houston. The closest ZIP codes are 77204, 77004 and 77033. 26,153 people live here in 11,258 households. At about 4,304 people per square mile it is built up to city-neighborhood density, and owners and renters are mixed (42% own). Median household income is $45,574, well below the Texas median of $78,476.
Quick facts
- Mailing city: Houston, TX
- County: Harris County
- Metro area: Houston
- Land area: 6.1 sq mi
- Population: 26,153
- Median household income: $45,574
- Carrier routes: 18 (12,252 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 26,153 |
| Households | 11,258 |
| Median household income | $45,574 |
| Income per person | $35,887 |
| Median age | 36.5 |
| Homeowners | 41.8% |
| Median home value | $227,900 |
| Median rent | $1,236 |
| Bachelor's degree or higher | 33.0% |
| Average commute (minutes) | 28.6 |
| Households with kids under 18 | 26.0% |
| Moved in the past year | 17.8% |
| Below the poverty line | 29.0% |
| Broadband internet | 84.9% |
| Speak a non-English language at home | 25.3% |
Household income
| % of households | Value |
|---|---|
| <$10K | 14.1% |
| $10–15K | 9.7% |
| $15–25K | 10.1% |
| $25–35K | 8.9% |
| $35–50K | 11.8% |
| $50–75K | 12.7% |
| $75–100K | 8.4% |
| $100–150K | 11.1% |
| $150–200K | 5.9% |
| $200K+ | 7.4% |
Age
| % of all residents | Value |
|---|---|
| <10 | 12.7% |
| 10–19 | 13.0% |
| 20–24 | 7.1% |
| 25–34 | 15.5% |
| 35–44 | 12.0% |
| 45–54 | 11.5% |
| 55–64 | 10.9% |
| 65–74 | 9.5% |
| 75+ | 7.7% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 16.8% |
| Owned outright | 19.8% |
| Rented | 50.1% |
| Vacant | 13.2% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 55.0% |
| Townhome | 2.9% |
| 2–4 units | 5.7% |
| 5–19 units | 14.8% |
| 20+ units | 20.2% |
| Mobile / other | 1.4% |
Businesses in 77021
435 business establishments with 8,079 employees (ZIP Codes Business Patterns 2023).
- Retail Trade: 76
- Health Care and Social Assistance: 70
- Professional, Scientific, and Technical Services: 44
- Accommodation and Food Services: 44
- Other Services (except Public Administration): 44
- Real Estate and Rental and Leasing: 27
- Construction: 22
- Finance and Insurance: 22
EDDM carrier routes
77021 has 18 USPS carrier routes with 12,252 residential and 866 business mailboxes. Open the EDDM route map.
Carrier routes in 77021
77021 has 18 USPS carrier routes (18 city (C)) with 12,252 residential and 866 business mailboxes. Routes range from 390 homes (C010) to 1,141 homes (C021); the median route has 608 homes. The Census counted 11,258 households in 77021 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 3 |
| 500–749 | 9 |
| 750–999 | 3 |
| 1,000–1,499 | 3 |
| 1,500+ | 0 |
Best routes in 77021 for…
Highest income
For bigger-ticket offers: remodeling, pools, financial planning, private schools.
- Route C010 — Est. median household income $128,580, 390 homes
- Route C007 — Est. median household income $99,268, 608 homes
- Route C029 — Est. median household income $85,929, 1,122 homes
- Route C006 — Est. median household income $80,718, 565 homes
- Route C027 — Est. median household income $55,557, 570 homes
Select these 5 routes on the route map
Often mailed by: Home services EDDM, Real estate EDDM postcards, Landscaping and lawn care mailers
Most families with kids
For tutoring, youth sports, pediatric dental, child care and family dining.
- Route C018 — Est. families with children under 18 32.6%, 479 homes
- Route C028 — Est. families with children under 18 32.5%, 889 homes
- Route C003 — Est. families with children under 18 32.3%, 1,008 homes
- Route C027 — Est. families with children under 18 31.7%, 570 homes
- Route C010 — Est. families with children under 18 31.6%, 390 homes
Select these 5 routes on the route map
Often mailed by: Dental practice EDDM, Healthcare and clinic mailers
Most homeowners
Owners decide on roofs, HVAC, lawns, solar and insurance; renters usually can't.
- Route C010 — Est. owner-occupied homes 75.0%, 390 homes
- Route C007 — Est. owner-occupied homes 65.7%, 608 homes
- Route C002 — Est. owner-occupied homes 63.0%, 782 homes
- Route C027 — Est. owner-occupied homes 61.0%, 570 homes
- Route C018 — Est. owner-occupied homes 57.0%, 479 homes
Select these 5 routes on the route map
Often mailed by: Roofing direct mail, HVAC postcards
Most new movers
New residents are still choosing a dentist, a gym and a lawn service.
- Route C028 — Est. residents who moved in the past year 26.9%, 889 homes
- Route C003 — Est. residents who moved in the past year 26.1%, 1,008 homes
- Route C006 — Est. residents who moved in the past year 24.8%, 565 homes
- Route C018 — Est. residents who moved in the past year 22.5%, 479 homes
- Route C014 — Est. residents who moved in the past year 21.3%, 613 homes
Select these 5 routes on the route map
Often mailed by: Restaurant EDDM menus and offers, Gym and fitness mailers
Newest homes
Newer subdivisions: landscaping, window treatments, fencing, security, home warranties.
- Route C025 — Est. homes built 2010 or later 22.6%, 513 homes
- Route C029 — Est. homes built 2010 or later 20.5%, 1,122 homes
- Route C014 — Est. homes built 2010 or later 18.7%, 613 homes
- Route C006 — Est. homes built 2010 or later 16.7%, 565 homes
- Route C011 — Est. homes built 2010 or later 16.7%, 420 homes
Select these 5 routes on the route map
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C021 — USPS business mailboxes 149, 1,141 homes
- Route C014 — USPS business mailboxes 127, 613 homes
- Route C001 — USPS business mailboxes 90, 541 homes
- Route C015 — USPS business mailboxes 87, 630 homes
- Route C022 — USPS business mailboxes 84, 798 homes
Select these 5 routes on the route map
Every carrier route in 77021
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C001 | City | 541 | 90 | $49,707 | 50.9% | 27.4% | 17.5% |
| C002 | City | 782 | 45 | $47,648 | 63.0% | 31.0% | 6.5% |
| C003 | City | 1,008 | 33 | $23,710 | 35.9% | 32.3% | 26.1% |
| C006 | City | 565 | 55 | $80,718 | 25.8% | 14.2% | 24.8% |
| C007 | City | 608 | 3 | $99,268 | 65.7% | 27.8% | 9.5% |
| C010 | City | 390 | 6 | $128,580 | 75.0% | 31.6% | 11.6% |
| C011 | City | 420 | 22 | $50,545 | 48.8% | 25.2% | 20.8% |
| C014 | City | 613 | 127 | $46,055 | 42.9% | 30.3% | 21.3% |
| C015 | City | 630 | 87 | $29,705 | 53.1% | 27.0% | 11.6% |
| C018 | City | 479 | 8 | $41,030 | 57.0% | 32.6% | 22.5% |
| C019 | City | 575 | 52 | $28,385 | 51.3% | 29.0% | 10.3% |
| C021 | City | 1,141 | 149 | $55,347 | 53.2% | 28.1% | 10.3% |
| C022 | City | 798 | 84 | $43,164 | 39.5% | 21.2% | 14.4% |
| C023 | City | 608 | 22 | $26,458 | 39.8% | 14.7% | 6.4% |
| C025 | City | 513 | 15 | $40,361 | 27.7% | 27.0% | 15.1% |
| C027 | City | 570 | 23 | $55,557 | 61.0% | 31.7% | 3.5% |
| C028 | City | 889 | 22 | $33,264 | 48.4% | 32.5% | 26.9% |
| C029 | City | 1,122 | 23 | $85,929 | 33.4% | 14.7% | 19.6% |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 77021 on the EDDM route map.
How route demographics are estimated
Mailbox counts come from USPS; demographics are estimates
The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).
How a route gets its figures: the block-group length-share method
We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.
Margins of error
Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.
Different years
USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.
Why some routes show identical figures
Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.
Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Nearby ZIP codes
- 77204 — Houston city, TX (1.7 mi)
- 77004 — Houston city, TX (1.8 mi)
- 77033 — Houston city, TX (2.4 mi)
- 77030 — Houston city, TX (2.7 mi)
- 77023 — Houston city, TX (2.8 mi)
- 77054 — Houston city, TX (3.1 mi)
- 77051 — Houston city, TX (3.2 mi)
- 77087 — Houston city, TX (3.3 mi)
Areas that include 77021
- Houston, TX ZIP codes — 111 ZIP codes
- Harris County ZIP codes — 136 ZIP codes
- Houston ZIP code map — 238 ZIP codes
- Texas ZIP code data
Mail every home in 77021
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
Houston EDDM mailing
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 77021, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 77021 in?
- 77021 is a Houston, TX mailing address. By land area, 100% lies inside Houston.
- What county is 77021 in?
- 77021 is in Harris County.
- What is the population of 77021?
- About 26,153 people (±1,873), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 28,055.
- What is the median household income in 77021?
- $45,574 (±$3,356), compared with $78,476 for Texas as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 77021?
- 18 USPS carrier routes with 12,252 residential and 866 business mailboxes (13,119 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 77021?
- The closest, measured center to center: 77204 (1.7 mi, Houston), 77004 (1.8 mi, Houston), 77033 (2.4 mi, Houston), 77030 (2.7 mi, Houston), 77023 (2.8 mi, Houston) and 77054 (3.1 mi, Houston).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.