77318 ZIP Code, Willis, TX
77318 is a ZIP code in Willis, Texas in Montgomery County. It covers 37 square miles of land, centered about 49 miles north of downtown Houston. The closest ZIP codes are 77304, 77358 and 77378. 20,792 people live here in 7,913 households. With about 561 people per square mile it is lightly settled, and most homes are owner-occupied (81%). Median household income is $92,415, above the Texas median of $78,476.
Quick facts
- Mailing city: Willis, TX
- County: Montgomery County
- Metro area: Houston
- Land area: 37 sq mi
- Population: 20,792
- Median household income: $92,415
- Carrier routes: 15 (11,336 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 20,792 |
| Households | 7,913 |
| Median household income | $92,415 |
| Income per person | $46,752 |
| Median age | 43.1 |
| Homeowners | 80.7% |
| Median home value | $316,900 |
| Median rent | $1,386 |
| Bachelor's degree or higher | 29.0% |
| Average commute (minutes) | 32.3 |
| Households with kids under 18 | 29.2% |
| Moved in the past year | 8.0% |
| Below the poverty line | 6.6% |
| Broadband internet | 96.0% |
| Speak a non-English language at home | 12.3% |
Household income
| % of households | Value |
|---|---|
| <$10K | 2.5% |
| $10–15K | 3.8% |
| $15–25K | 4.1% |
| $25–35K | 6.0% |
| $35–50K | 8.0% |
| $50–75K | 10.2% |
| $75–100K | 19.1% |
| $100–150K | 17.3% |
| $150–200K | 12.8% |
| $200K+ | 16.3% |
Age
| % of all residents | Value |
|---|---|
| <10 | 11.4% |
| 10–19 | 12.0% |
| 20–24 | 4.6% |
| 25–34 | 8.1% |
| 35–44 | 16.7% |
| 45–54 | 10.4% |
| 55–64 | 17.1% |
| 65–74 | 15.0% |
| 75+ | 4.7% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 39.7% |
| Owned outright | 31.5% |
| Rented | 16.8% |
| Vacant | 12.1% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 78.3% |
| Townhome | 2.1% |
| 2–4 units | 0.7% |
| 5–19 units | 1.8% |
| 20+ units | 1.3% |
| Mobile / other | 16.0% |
Businesses in 77318
309 business establishments with 2,833 employees (ZIP Codes Business Patterns 2023).
- Construction: 49
- Other Services (except Public Administration): 37
- Retail Trade: 35
- Professional, Scientific, and Technical Services: 30
- Accommodation and Food Services: 28
- Health Care and Social Assistance: 21
- Manufacturing: 17
- Administrative and Support and Waste Management and Remediation Services: 17
EDDM carrier routes
77318 has 15 USPS carrier routes with 11,336 residential and 326 business mailboxes. Open the EDDM route map.
Carrier routes in 77318
77318 has 15 USPS carrier routes (15 rural (R)) with 11,336 residential and 326 business mailboxes. Routes range from 498 homes (R016) to 1,902 homes (R027); the median route has 636 homes. The Census counted 7,913 households in 77318 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 1 |
| 500–749 | 8 |
| 750–999 | 4 |
| 1,000–1,499 | 1 |
| 1,500+ | 1 |
Best routes in 77318 for…
Highest income
For bigger-ticket offers: remodeling, pools, financial planning, private schools.
- Route R007 — Est. median household income $129,496, 505 homes
- Route R015 — Est. median household income $118,053, 571 homes
- Route R010 — Est. median household income $113,696, 785 homes
- Route R021 — Est. median household income $112,963, 636 homes
- Route R025 — Est. median household income $112,062, 768 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 R006 — Est. families with children under 18 42.9%, 661 homes
- Route R019 — Est. families with children under 18 37.4%, 1,126 homes
- Route R017 — Est. families with children under 18 35.1%, 557 homes
- Route R023 — Est. families with children under 18 32.0%, 888 homes
- Route R001 — Est. families with children under 18 32.0%, 519 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 R025 — Est. owner-occupied homes 97.0%, 768 homes
- Route R001 — Est. owner-occupied homes 96.6%, 519 homes
- Route R007 — Est. owner-occupied homes 94.9%, 505 homes
- Route R015 — Est. owner-occupied homes 94.3%, 571 homes
- Route R006 — Est. owner-occupied homes 94.1%, 661 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 R007 — Est. residents who moved in the past year 12.1%, 505 homes
- Route R015 — Est. residents who moved in the past year 10.8%, 571 homes
- Route R010 — Est. residents who moved in the past year 10.5%, 785 homes
- Route R006 — Est. residents who moved in the past year 10.3%, 661 homes
- Route R008 — Est. residents who moved in the past year 10.1%, 596 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 R021 — Est. homes built 2010 or later 47.2%, 636 homes
- Route R006 — Est. homes built 2010 or later 46.0%, 661 homes
- Route R023 — Est. homes built 2010 or later 40.8%, 888 homes
- Route R027 — Est. homes built 2010 or later 40.2%, 1,902 homes
- Route R025 — Est. homes built 2010 or later 40.0%, 768 homes
Select these 5 routes on the route map
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route R017 — USPS business mailboxes 131, 557 homes
- Route R016 — USPS business mailboxes 65, 498 homes
- Route R023 — USPS business mailboxes 43, 888 homes
- Route R015 — USPS business mailboxes 19, 571 homes
- Route R001 — USPS business mailboxes 19, 519 homes
Select these 5 routes on the route map
Every carrier route in 77318
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| R001 | Rural | 519 | 19 | $106,405 | 96.6% | 32.0% | 2.3% |
| R004 | Rural | 560 | 7 | $109,034 | 85.9% | 23.6% | 3.3% |
| R006 | Rural | 661 | 3 | $97,644 | 94.1% | 42.9% | 10.3% |
| R007 | Rural | 505 | 0 | $129,496 | 94.9% | 20.8% | 12.1% |
| R008 | Rural | 596 | 11 | $91,207 | 81.8% | 30.6% | 10.1% |
| R010 | Rural | 785 | 5 | $113,696 | 63.3% | 22.0% | 10.5% |
| R013 | Rural | 764 | 13 | $82,191 | 79.1% | 28.8% | 5.7% |
| R015 | Rural | 571 | 19 | $118,053 | 94.3% | 21.6% | 10.8% |
| R016 | Rural | 498 | 65 | $107,545 | 83.4% | 28.5% | 9.4% |
| R017 | Rural | 557 | 131 | $89,936 | 78.2% | 35.1% | 5.9% |
| R019 | Rural | 1,126 | 3 | $78,049 | 73.3% | 37.4% | 9.1% |
| R021 | Rural | 636 | 6 | $112,963 | 94.1% | 22.0% | 8.6% |
| R023 | Rural | 888 | 43 | $96,243 | 86.6% | 32.0% | 6.7% |
| R025 | Rural | 768 | 1 | $112,062 | 97.0% | 24.3% | 6.6% |
| R027 | Rural | 1,902 | 0 | $97,897 | 91.2% | 21.9% | 7.9% |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 77318 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
- 77304 — Conroe city, TX (8.4 mi)
- 77358 — New Waverly city, TX (9.4 mi)
- 77378 — Willis city, TX (10.2 mi)
- 77356 — Montgomery city, TX (10.7 mi)
- 77303 — Conroe city, TX (11.4 mi)
- 77301 — Conroe city, TX (11.9 mi)
- 77316 — Conroe city, TX (12.5 mi)
- 77340 — Huntsville city, TX (14.7 mi)
Areas that include 77318
- Willis, TX ZIP codes — 2 ZIP codes
- Montgomery County ZIP codes — 24 ZIP codes
- Houston ZIP code map — 238 ZIP codes
- Texas ZIP code data
Where it ranks
- No. 19 of 215: highest median age in the Houston area
- No. 4 of 24: highest median age in Montgomery County
- No. 7 of 24: fastest population growth in Montgomery County
Mail every home in 77318
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.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 77318, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 77318 in?
- 77318 is a Willis, TX mailing address. By land area, 5% lies inside Conroe and 3% lies inside Willis; the rest is outside any Census-defined city or community.
- What county is 77318 in?
- 77318 is in Montgomery County.
- What is the population of 77318?
- About 20,792 people (±1,891), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 17,518.
- What is the median household income in 77318?
- $92,415 (±$13,353), 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 77318?
- 15 USPS carrier routes with 11,336 residential and 326 business mailboxes (11,662 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 77318?
- The closest, measured center to center: 77304 (8.4 mi, Conroe), 77358 (9.4 mi, New Waverly), 77378 (10.2 mi, Willis), 77356 (10.7 mi, Montgomery), 77303 (11.4 mi, Conroe) and 77301 (11.9 mi, Conroe).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.