Residential delivery area · Texas
ZIP Code 77378: Willis, TX
ZIP code 77378 uses the postal name Willis, Texas and lies mostly in Montgomery County (61% of its land) with the rest in San Jacinto County (Census 2020 ZIP-county file). About 18,000 people live there (Census Bureau, ACS 2020-2024), the less populous of Willis's 2 residential ZIP codes. Median household income is $71,143 (Census Bureau, ACS 2020-2024). By Census place, 4% of its land lies in Willis, and 1% in smaller places; 95% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Willis · 2 residential ZIPs
- County
- Montgomery County (61%); San Jacinto County (40%)
- Census places
- Willis
- Metro area
- Houston-Pasadena-The Woodlands, TX
- House district
- TX-8 119th Congress
- State
- Texas
- Time zone
- Central
- Land area
- 89.1 sq mi · 198 people per sq mi
Where is ZIP code 77378?
77378 centers on 30.478°, -95.385° and covers 89.1 square miles of land plus 0.5 of water. It borders 5 ZIP codes: 77358, 77303, 77318, 77328, 77331.
The map draws ZIP code areas only. For the streets inside 77378, 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 77378 compare with the rest of Willis?
| Measure | 77378 | In Willis | In Montgomery County | In TX |
|---|---|---|---|---|
| People (ACS 2020-2024) | 17,629 | 2nd of 2 | 21st of 26 | 631st of 1,990 |
| Median household income | $71k | 2nd of 2 | 21st of 23 | 609th of 1,172 |
| Median home value | $200k | 2nd of 2 | 22nd of 24 | 749th of 1,172 |
Its median household income is higher than in 49% of U.S. residential ZIP codes, and it is denser than 63% 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 77378?
The 2020 Census counted 17,417 people in 77378; the ACS, which samples households over 2020-2024, estimates 17,629. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 17,629
- 2020 Census count
- 17,417
- Households
- 5,924
- Median age
- 35.1
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 77378?
Of the 17,629 people the ACS estimates in 77378, 25.9% are under 18 and 13.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (56.3%), then Hispanic or Latino (32.4%).
- Under 1825.9%
- 18 to 6460.6%
- 65 and older13.5%
- White, not Hispanic56.3%
- Hispanic or Latino32.4%
- Black, not Hispanic8.6%
- Other or two or more2.6%
- Asian, not Hispanic0.1%
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 77378 earn?
Median household income is $71,143 (ACS 2020-2024), the 21st highest of the 23 ranked ZIP codes in Montgomery County.
- Median household income
- $71,143
- Income per person
- $31,889
- Below the poverty line
- 10.6%
- Unemployed (of the labor force)
- 6.7%
- Adults 25+ with a bachelor's degree
- 18.4%
- Adjusted gross income per tax return, 2022
- $71,6648,770 returns; wages 70% 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 77378?
FHFA's house price index for 77378, built from repeat sales and appraisals of the same homes, rose 80% from 2015 to 2025 and rose 42% from 2020 to 2025, and moved −3.2% in 2025.
- Median home value (owners' estimate)
- $199,800
- Median gross rent
- $1,532
- Homes owned by their occupants
- 74.5%
- Housing units
- 6,173
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 77378?
287 business establishments had a location in this ZIP code in 2023, 99 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction60
- Retail trade34
- Accommodation and food services28
- Other services (except public administration)27
- Manufacturing23
- Administrative and support and waste management and remediation services21
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 77378?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 77358 | New Waverly | 5,087 | $60k | 5.7 mi |
| 77303 | Conroe | 28,854 | $75k | 6.9 mi |
| 77318 | Willis | 20,792 | $92k | 10.2 mi |
| 77328 | Cleveland | 17,208 | $62k | 12.5 mi |
| 77331 | Coldspring | 7,556 | $62k | 15.3 mi |
| 77301 | Conroe | 37,769 | $67k | 11.9 mi (near) |
| 77304 | Conroe | 44,225 | $80k | 13.0 mi (near) |
| 77306 | Conroe | 18,086 | $76k | 14.0 mi (near) |
| 77340 | Huntsville | 37,517 | $49k | 15.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.