77381 ZIP Code, Spring, TX

77381 is a ZIP code in Spring, Texas in Montgomery County. It covers 13 square miles of land, centered about 30 miles north of downtown Houston. The closest ZIP codes are 77382, 77380 and 77389. 36,139 people live here in 13,544 households. At about 2,851 people per square mile it has suburban density, and most homes are owner-occupied (79%). Median household income is $143,565, well above the Texas median of $78,476.

Quick facts

Key figures

MeasureValue
Residents36,139
Households13,544
Median household income$143,565
Income per person$73,891
Median age44.5
Homeowners78.6%
Median home value$473,600
Median rent$1,727
Bachelor's degree or higher61.8%
Average commute (minutes)27.6
Households with kids under 1832.1%
Moved in the past year8.8%
Below the poverty line4.7%
Broadband internet96.3%
Speak a non-English language at home17.4%

Household income

% of householdsValue
<$10K4.6%
$10–15K1.4%
$15–25K2.7%
$25–35K4.1%
$35–50K6.0%
$50–75K9.5%
$75–100K9.1%
$100–150K14.9%
$150–200K12.6%
$200K+35.2%

Age

% of all residentsValue
<1010.3%
10–1915.6%
20–244.5%
25–348.2%
35–4412.2%
45–5413.7%
55–6414.8%
65–7413.9%
75+6.9%

Tenure

% of housing unitsValue
Owned, with mortgage43.0%
Owned outright32.9%
Rented20.4%
Vacant3.7%

Type of building

% of housing unitsValue
Detached house85.2%
Townhome2.2%
2–4 units1.7%
5–19 units4.6%
20+ units5.6%
Mobile / other0.6%

Businesses in 77381

840 business establishments with 14,930 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

77381 has 27 USPS carrier routes with 13,973 residential and 551 business mailboxes. Open the EDDM route map.

Carrier routes in 77381

77381 has 27 USPS carrier routes (27 city (C)) with 13,973 residential and 551 business mailboxes. Routes range from 216 homes (C025) to 982 homes (C023); the median route has 463 homes. The Census counted 13,544 households in 77381 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2492
250–49914
500–7498
750–9993
1,000–1,4990
1,500+0

Best routes in 77381 for…

Highest income

For bigger-ticket offers: remodeling, pools, financial planning, private schools.

  1. Route C045 — Est. median household income $200,000+, 462 homes
  2. Route C016 — Est. median household income $200,000+, 457 homes
  3. Route C027 — Est. median household income $200,000+, 424 homes
  4. Route C017 — Est. median household income $200,000+, 420 homes
  5. Route C020 — Est. median household income $200,000+, 383 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.

  1. Route C019 — Est. families with children under 18 50.9%, 416 homes
  2. Route C020 — Est. families with children under 18 50.6%, 383 homes
  3. Route C026 — Est. families with children under 18 49.8%, 549 homes
  4. Route C017 — Est. families with children under 18 49.4%, 420 homes
  5. Route C007 — Est. families with children under 18 48.0%, 217 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.

  1. Route C031 — Est. owner-occupied homes 96.4%, 463 homes
  2. Route C016 — Est. owner-occupied homes 96.1%, 457 homes
  3. Route C012 — Est. owner-occupied homes 95.8%, 405 homes
  4. Route C020 — Est. owner-occupied homes 95.8%, 383 homes
  5. Route C025 — Est. owner-occupied homes 95.0%, 216 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.

  1. Route C044 — Est. residents who moved in the past year 19.2%, 631 homes
  2. Route C002 — Est. residents who moved in the past year 14.8%, 553 homes
  3. Route C015 — Est. residents who moved in the past year 13.8%, 431 homes
  4. Route C010 — Est. residents who moved in the past year 12.6%, 942 homes
  5. Route C047 — Est. residents who moved in the past year 11.4%, 368 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.

  1. Route C046 — Est. homes built 2010 or later 31.5%, 545 homes
  2. Route C049 — Est. homes built 2010 or later 14.3%, 681 homes
  3. Route C031 — Est. homes built 2010 or later 8.1%, 463 homes
  4. Route C006 — Est. homes built 2010 or later 5.1%, 623 homes
  5. Route C018 — Est. homes built 2010 or later 4.1%, 475 homes

Select these 5 routes on the route map

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

  1. Route C007 — USPS business mailboxes 188, 217 homes
  2. Route C025 — USPS business mailboxes 114, 216 homes
  3. Route C049 — USPS business mailboxes 86, 681 homes
  4. Route C010 — USPS business mailboxes 80, 942 homes
  5. Route C028 — USPS business mailboxes 26, 358 homes

Select these 5 routes on the route map

Every carrier route in 77381

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
C001City89917$84,56254.1%31.0%4.5%
C002City5530$97,83064.2%26.9%14.8%
C003City5838$166,65094.8%41.9%5.0%
C006City6230$119,83984.1%35.2%10.0%
C007City217188$187,84993.7%48.0%6.5%
C009City5560$134,89693.8%47.6%8.6%
C010City94280$101,19064.4%17.6%12.6%
C011City4630$198,43287.5%33.8%8.4%
C012City4050$193,83395.8%34.4%2.9%
C015City4310$140,73079.7%39.6%13.8%
C016City4571$200,000+96.1%31.6%5.2%
C017City4200$200,000+90.1%49.4%9.2%
C018City4754$129,33582.9%35.3%9.8%
C019City4160$164,88193.9%50.9%7.8%
C020City3831$200,000+95.8%50.6%8.2%
C022City4711$156,13286.8%32.2%8.6%
C023City98213$70,54147.7%24.1%10.4%
C025City216114$200,000+95.0%38.9%7.3%
C026City5492$180,30089.6%49.8%8.7%
C027City4245$200,000+90.7%33.3%5.3%
C028City35826$173,80279.9%35.9%9.8%
C031City4630$89,36896.4%4.8%5.4%
C044City6310$73,85865.0%11.6%19.2%
C045City4621$200,000+86.8%23.1%3.4%
C046City5450$122,72564.3%14.8%10.0%
C047City3684$200,000+77.2%46.4%11.4%
C049City68186$122,17384.7%20.6%7.8%

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 77381 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

Areas that include 77381

Where it ranks

Mail every home in 77381

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.

The Woodlands EDDM mailing

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 77381, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 77381 in?
77381 is a Spring, TX mailing address. By land area, 94% lies inside The Woodlands and 5% lies inside Shenandoah.
What county is 77381 in?
77381 is in Montgomery County.
What is the population of 77381?
About 36,139 people (±2,014), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 35,191.
What is the median household income in 77381?
$143,565 (±$10,788), 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 77381?
27 USPS carrier routes with 13,973 residential and 551 business mailboxes (14,525 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 77381?
The closest, measured center to center: 77382 (3 mi, The Woodlands), 77380 (3.4 mi, The Woodlands), 77389 (3.8 mi, The Woodlands), 77384 (3.9 mi, Conroe), 77385 (4.4 mi, The Woodlands) and 77375 (7.6 mi, Tomball).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.