78933 ZIP Code, Cat Spring, TX
78933 is a ZIP code in Cat Spring, Texas — mostly in Colorado County (70% of its land), with smaller parts in Austin County. It covers 131 square miles of land. The closest ZIP codes are 78935, 78950 and 77474. 1,395 people live here in 506 households. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (83%). Median household income is $68,444, below the Texas median of $78,476; the median age is 50.7, older than most ZIP codes.
Quick facts
- Mailing city: Cat Spring, TX
- County: Colorado County
- Land area: 131 sq mi
- Population: 1,395
- Median household income: $68,444
- Carrier routes: 2 (777 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 1,395 |
| Households | 506 |
| Median household income | $68,444 |
| Income per person | $39,721 |
| Median age | 50.7 |
| Homeowners | 82.8% |
| Median home value | $272,600 |
| Median rent | not published |
| Bachelor's degree or higher | 21.6% |
| Average commute (minutes) | 42.3 |
| Households with kids under 18 | 21.9% |
| Moved in the past year | 0.0% |
| Below the poverty line | 2.7% |
| Broadband internet | 76.7% |
| Speak a non-English language at home | 9.2% |
Household income
| % of households | Value |
|---|---|
| <$10K | 5.9% |
| $10–15K | 1.6% |
| $15–25K | 6.1% |
| $25–35K | 5.5% |
| $35–50K | 12.1% |
| $50–75K | 24.3% |
| $75–100K | 12.3% |
| $100–150K | 6.3% |
| $150–200K | 7.5% |
| $200K+ | 18.4% |
Age
| % of all residents | Value |
|---|---|
| <10 | 20.8% |
| 10–19 | 7.0% |
| 20–24 | 1.5% |
| 25–34 | 7.0% |
| 35–44 | 8.3% |
| 45–54 | 11.7% |
| 55–64 | 11.8% |
| 65–74 | 15.1% |
| 75+ | 16.7% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 11.5% |
| Owned outright | 55.5% |
| Rented | 13.9% |
| Vacant | 19.0% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 75.7% |
| Townhome | 2.1% |
| 2–4 units | 5.0% |
| 5–19 units | 0.0% |
| 20+ units | 0.0% |
| Mobile / other | 17.3% |
Businesses in 78933
29 business establishments with 176 employees (ZIP Codes Business Patterns 2023).
- Construction: 9
- Other Services (except Public Administration): 4
- Wholesale Trade: 3
- Real Estate and Rental and Leasing: 3
EDDM carrier routes
78933 has 2 USPS carrier routes with 777 residential and 12 business mailboxes. Open the EDDM route map.
Carrier routes in 78933
78933 has 2 USPS carrier routes (2 rural (R)) with 777 residential and 12 business mailboxes. Routes range from 323 homes (R402) to 454 homes (R401); the median route has 389 homes. The Census counted 506 households in 78933 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 2 |
| 500–749 | 0 |
| 750–999 | 0 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 78933 for…
Highest income
For bigger-ticket offers: remodeling, pools, financial planning, private schools.
- Route R402 — Est. median household income $94,074, 323 homes
- Route R401 — Est. median household income $68,778, 454 homes
Select these 2 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 R402 — Est. families with children under 18 34.7%, 323 homes
- Route R401 — Est. families with children under 18 19.9%, 454 homes
Select these 2 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 R401 — Est. owner-occupied homes 90.2%, 454 homes
- Route R402 — Est. owner-occupied homes 75.5%, 323 homes
Select these 2 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 R401 — Est. residents who moved in the past year 16.5%, 454 homes
- Route R402 — Est. residents who moved in the past year 6.0%, 323 homes
Select these 2 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 R402 — Est. homes built 2010 or later 19.2%, 323 homes
- Route R401 — Est. homes built 2010 or later 16.7%, 454 homes
Select these 2 routes on the route map
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route R402 — USPS business mailboxes 8, 323 homes
- Route R401 — USPS business mailboxes 4, 454 homes
Select these 2 routes on the route map
Every carrier route in 78933
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| R401 | Rural | 454 | 4 | $68,778 | 90.2% | 19.9% | 16.5% |
| R402 | Rural | 323 | 8 | $94,074 | 75.5% | 34.7% | 6.0% |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 78933 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
- 78935 (8.1 mi)
- 78950 — New Ulm CDP, TX (9.9 mi)
- 77474 — Sealy city, TX (10.9 mi)
- 78934 — Columbus city, TX (13.7 mi)
- 77418 — Bellville city, TX (14.6 mi)
- 78943 — Glidden CDP, TX (15.4 mi)
- 78944 — Industry city, TX (15.5 mi)
- 77473 — San Felipe town, TX (15.9 mi)
Areas that include 78933
- Cat Spring, TX ZIP codes — 1 ZIP code
- Austin County ZIP codes — 9 ZIP codes
- Colorado County ZIP codes — 14 ZIP codes
- Texas ZIP code data
Where it ranks
- No. 2 of 7: highest median home value in Colorado County
- No. 4 of 7: highest share of owner-occupied homes in Colorado County
- No. 4 of 7: highest share of households with children in Colorado County
- No. 2 of 7: highest median age in Colorado County
- No. 2 of 6: fastest population growth in Colorado County
Mail every home in 78933
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) 78933, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 78933 in?
- 78933 is a Cat Spring, TX mailing address. None of its land lies inside a Census-defined city or community.
- What county is 78933 in?
- 78933 is mostly in Colorado County (70% of its land), with smaller parts in Austin County.
- What is the population of 78933?
- About 1,395 people (±428), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 1,531.
- What is the median household income in 78933?
- $68,444 (±$16,073), 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 78933?
- 2 USPS carrier routes with 777 residential and 12 business mailboxes (789 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 78933?
- The closest, measured center to center: 78935 (8.1 mi), 78950 (9.9 mi, New Ulm), 77474 (10.9 mi, Sealy), 78934 (13.7 mi, Columbus), 77418 (14.6 mi, Bellville) and 78943 (15.4 mi, Glidden).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.