🇺🇸 United States ZIP Code

STANDARD

77318

Willis

ZIP Code 77318 is a standard zip code serving Willis, Willis, Texas (TX), in Montgomery County, United States. It has an estimated population of 14,281 with a median household income of $78,194. The area falls within the America/Chicago timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Texas (TX)
County: Montgomery
City: Willis
Timezone: America/Chicago

Coordinates

Latitude: 30.441600
Longitude: -95.539400

Geographic Details

Land Area: 38.35 mi²
Water Area: 12.05 mi²
Population Density: 372.0 people per mi² (65th percentile)
Bounding Box: 30.508980°N, 30.357195°S, -95.486692°E, -95.599157°W

With 14,281 residents spread across 38.35 square miles, this area has a population density of 372.0 people per square mile.

Demographics

14,281

Population

75th percentile

$78,194

Median Income

85th percentile

$166,100

Median Home Value

65th percentile

38.35 mi²

Land Area

The median household income in 77318 is $78,194, and the median home value is $166,100. This places the area in the top 25% nationally for household income.

Housing

6,780

Total Units

5,640

Occupied Units

83.2%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Willis, TX.

77378

Willis

Similar ZIP Codes in Texas

ZIP codes with similar median household income in Texas.

75189

Royse City

$73,146

76131

Fort Worth

$77,413

75167

Waxahachie

$76,207

75075

Plano

$72,852

79705

Midland

$68,649

77505

Pasadena

$72,695

78108

Cibolo

$83,743

77968

Inez

$72,593

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.