78656 ZIP Code, Maxwell, TX
78656 is a ZIP code in Maxwell, Texas in Caldwell County. It covers 28 square miles of land, centered about 25 miles south of downtown Austin. The closest ZIP codes are 78640, 78655 and 78644. 2,847 people live here in 976 households. With about 100 people per square mile it is lightly settled, and owners and renters are mixed (69% own). Median household income is $81,346, close to the Texas median of $78,476.
Quick facts
- Mailing city: Maxwell, TX
- County: Caldwell County
- Metro area: Austin
- Land area: 28 sq mi
- Population: 2,847
- Median household income: $81,346
- Carrier routes: 3 (3,072 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 2,847 |
| Households | 976 |
| Median household income | $81,346 |
| Income per person | $32,747 |
| Median age | 32.5 |
| Homeowners | 69.2% |
| Median home value | $238,100 |
| Median rent | $1,629 |
| Bachelor's degree or higher | 23.9% |
| Average commute (minutes) | 27.9 |
| Households with kids under 18 | 28.3% |
| Moved in the past year | 5.0% |
| Below the poverty line | 13.7% |
| Broadband internet | 85.8% |
| Speak a non-English language at home | 41.4% |
Household income
| % of households | Value |
|---|---|
| <$10K | 0.0% |
| $10–15K | 0.4% |
| $15–25K | 7.9% |
| $25–35K | 7.8% |
| $35–50K | 15.0% |
| $50–75K | 18.2% |
| $75–100K | 22.4% |
| $100–150K | 14.7% |
| $150–200K | 9.6% |
| $200K+ | 4.0% |
Age
| % of all residents | Value |
|---|---|
| <10 | 15.4% |
| 10–19 | 6.7% |
| 20–24 | 6.8% |
| 25–34 | 23.5% |
| 35–44 | 14.7% |
| 45–54 | 6.6% |
| 55–64 | 17.4% |
| 65–74 | 7.2% |
| 75+ | 1.7% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 39.9% |
| Owned outright | 28.5% |
| Rented | 30.5% |
| Vacant | 1.1% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 52.1% |
| Townhome | 0.4% |
| 2–4 units | 1.7% |
| 5–19 units | 0.0% |
| 20+ units | 0.0% |
| Mobile / other | 45.8% |
Businesses in 78656
39 business establishments with 368 employees (ZIP Codes Business Patterns 2023).
- Construction: 7
- Health Care and Social Assistance: 7
- Manufacturing: 5
- Retail Trade: 3
- Transportation and Warehousing: 3
- Administrative and Support and Waste Management and Remediation Services: 3
- Other Services (except Public Administration): 3
EDDM carrier routes
78656 has 3 USPS carrier routes with 3,072 residential and 28 business mailboxes. Open the EDDM route map.
Carrier routes in 78656
78656 has 3 USPS carrier routes (3 rural (R)) with 3,072 residential and 28 business mailboxes. Routes range from 426 homes (R405) to 1,798 homes (R403); the median route has 848 homes. The Census counted 976 households in 78656 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 1 |
| 500–749 | 0 |
| 750–999 | 1 |
| 1,000–1,499 | 0 |
| 1,500+ | 1 |
Best routes in 78656 for…
Highest income
For bigger-ticket offers: remodeling, pools, financial planning, private schools.
- Route R403 — Est. median household income $113,654, 1,798 homes
- Route R405 — Est. median household income $93,243, 426 homes
- Route R402 — Est. median household income $81,581, 848 homes
Select these 3 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 R403 — Est. families with children under 18 48.6%, 1,798 homes
- Route R405 — Est. families with children under 18 43.0%, 426 homes
- Route R402 — Est. families with children under 18 32.2%, 848 homes
Select these 3 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 R402 — Est. owner-occupied homes 80.0%, 848 homes
- Route R403 — Est. owner-occupied homes 78.9%, 1,798 homes
- Route R405 — Est. owner-occupied homes 72.5%, 426 homes
Select these 3 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 R405 — Est. residents who moved in the past year 13.2%, 426 homes
- Route R402 — Est. residents who moved in the past year 12.2%, 848 homes
- Route R403 — Est. residents who moved in the past year 9.1%, 1,798 homes
Select these 3 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 R405 — Est. homes built 2010 or later 36.2%, 426 homes
- Route R402 — Est. homes built 2010 or later 35.6%, 848 homes
- Route R403 — Est. homes built 2010 or later 30.7%, 1,798 homes
Select these 3 routes on the route map
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route R402 — USPS business mailboxes 20, 848 homes
- Route R405 — USPS business mailboxes 5, 426 homes
- Route R403 — USPS business mailboxes 3, 1,798 homes
Select these 3 routes on the route map
Every carrier route in 78656
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| R402 | Rural | 848 | 20 | $81,581 | 80.0% | 32.2% | 12.2% |
| R403 | Rural | 1,798 | 3 | $113,654 | 78.9% | 48.6% | 9.1% |
| R405 | Rural | 426 | 5 | $93,243 | 72.5% | 43.0% | 13.2% |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 78656 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
- 78640 — Kyle city, TX (6.3 mi)
- 78655 — Martindale city, TX (6.3 mi)
- 78644 — Lockhart city, TX (8.3 mi)
- 78622 (8.6 mi)
- 78670 — Staples city, TX (10 mi)
- 78666 — San Marcos city, TX (10.7 mi)
- 78610 — Buda city, TX (12.3 mi)
- 78661 (12.9 mi)
Areas that include 78656
- San Marcos, TX ZIP codes — 2 ZIP codes
- Maxwell, TX ZIP codes — 1 ZIP code
- Caldwell County ZIP codes — 11 ZIP codes
- Austin ZIP code map — 89 ZIP codes
- Texas ZIP code data
Where it ranks
- No. 11 of 83: lowest median age in the Austin area
- No. 4 of 9: highest median household income in Caldwell County
- No. 5 of 9: highest share of residents who moved in during the past year in Caldwell County
- No. 2 of 9: lowest median age in Caldwell County
Mail every home in 78656
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) 78656, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 78656 in?
- 78656 is a Maxwell, TX mailing address. By land area, 11% lies inside San Marcos; the rest is outside any Census-defined city or community.
- What county is 78656 in?
- 78656 is in Caldwell County.
- What is the population of 78656?
- About 2,847 people (±668), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 2,596.
- What is the median household income in 78656?
- $81,346 (±$32,292), 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 78656?
- 3 USPS carrier routes with 3,072 residential and 28 business mailboxes (3,100 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 78656?
- The closest, measured center to center: 78640 (6.3 mi, Kyle), 78655 (6.3 mi, Martindale), 78644 (8.3 mi, Lockhart), 78622 (8.6 mi), 78670 (10 mi, Staples) and 78666 (10.7 mi, San Marcos).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.