75831 ZIP Code, Buffalo, TX
75831 is a ZIP code in Buffalo, Texas — mostly in Leon County (70% of its land), with smaller parts in Freestone County. It covers 251 square miles of land. The closest ZIP codes are 75855, 75838 and 75846. 4,881 people live here in 2,043 households. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (71%). Median household income is $51,935, well below the Texas median of $78,476.
Quick facts
- Mailing city: Buffalo, TX
- County: Leon County
- Land area: 251 sq mi
- Population: 4,881
- Median household income: $51,935
- Carrier routes: 5 (1,947 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 4,881 |
| Households | 2,043 |
| Median household income | $51,935 |
| Income per person | $30,333 |
| Median age | 42.1 |
| Homeowners | 71.3% |
| Median home value | $117,500 |
| Median rent | $920 |
| Bachelor's degree or higher | 12.8% |
| Average commute (minutes) | 28.9 |
| Households with kids under 18 | 26.2% |
| Moved in the past year | 6.3% |
| Below the poverty line | 16.1% |
| Broadband internet | 82.6% |
| Speak a non-English language at home | 11.9% |
Household income
| % of households | Value |
|---|---|
| <$10K | 7.7% |
| $10–15K | 6.0% |
| $15–25K | 14.4% |
| $25–35K | 9.4% |
| $35–50K | 9.7% |
| $50–75K | 18.9% |
| $75–100K | 9.1% |
| $100–150K | 16.3% |
| $150–200K | 4.0% |
| $200K+ | 4.6% |
Age
| % of all residents | Value |
|---|---|
| <10 | 11.8% |
| 10–19 | 12.8% |
| 20–24 | 2.0% |
| 25–34 | 13.0% |
| 35–44 | 13.7% |
| 45–54 | 9.3% |
| 55–64 | 17.0% |
| 65–74 | 12.1% |
| 75+ | 8.4% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 18.4% |
| Owned outright | 36.5% |
| Rented | 22.1% |
| Vacant | 23.0% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 56.6% |
| Townhome | 0.7% |
| 2–4 units | 1.2% |
| 5–19 units | 1.9% |
| 20+ units | 2.3% |
| Mobile / other | 37.4% |
Businesses in 75831
116 business establishments with 2,369 employees (ZIP Codes Business Patterns 2023).
- Retail Trade: 24
- Other Services (except Public Administration): 23
- Accommodation and Food Services: 16
- Construction: 8
- Manufacturing: 7
- Wholesale Trade: 7
- Finance and Insurance: 7
- Health Care and Social Assistance: 5
EDDM carrier routes
75831 has 5 USPS carrier routes with 1,947 residential and 93 business mailboxes. Open the EDDM route map.
Carrier routes in 75831
75831 has 5 USPS carrier routes (5 rural (R)) with 1,947 residential and 93 business mailboxes. Routes range from 159 homes (R003) to 567 homes (R002); the median route has 505 homes. The Census counted 2,043 households in 75831 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 2 |
| 250–499 | 0 |
| 500–749 | 3 |
| 750–999 | 0 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 75831 for…
Highest income
For bigger-ticket offers: remodeling, pools, financial planning, private schools.
- Route R001 — Est. median household income $62,622, 512 homes
- Route R002 — Est. median household income $56,364, 567 homes
- Route R003 — Est. median household income $48,083, 159 homes
- Route R004 — Est. median household income $45,366, 505 homes
- Route R005 — Est. median household income $41,609, 204 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 R001 — Est. families with children under 18 27.6%, 512 homes
- Route R002 — Est. families with children under 18 26.6%, 567 homes
- Route R005 — Est. families with children under 18 26.5%, 204 homes
- Route R004 — Est. families with children under 18 25.4%, 505 homes
- Route R003 — Est. families with children under 18 24.4%, 159 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 R002 — Est. owner-occupied homes 75.9%, 567 homes
- Route R001 — Est. owner-occupied homes 75.6%, 512 homes
- Route R003 — Est. owner-occupied homes 69.7%, 159 homes
- Route R004 — Est. owner-occupied homes 59.0%, 505 homes
- Route R005 — Est. owner-occupied homes 54.4%, 204 homes
Select these 5 routes on the route map
Often mailed by: Roofing direct mail, HVAC postcards
Newest homes
Newer subdivisions: landscaping, window treatments, fencing, security, home warranties.
- Route R002 — Est. homes built 2010 or later 20.3%, 567 homes
- Route R001 — Est. homes built 2010 or later 17.5%, 512 homes
- Route R003 — Est. homes built 2010 or later 17.2%, 159 homes
- Route R004 — Est. homes built 2010 or later 13.5%, 505 homes
- Route R005 — Est. homes built 2010 or later 12.1%, 204 homes
Select these 5 routes on the route map
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route R004 — USPS business mailboxes 40, 505 homes
- Route R005 — USPS business mailboxes 35, 204 homes
- Route R002 — USPS business mailboxes 10, 567 homes
- Route R003 — USPS business mailboxes 5, 159 homes
- Route R001 — USPS business mailboxes 3, 512 homes
Select these 5 routes on the route map
Every carrier route in 75831
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| R001 | Rural | 512 | 3 | $62,622 | 75.6% | 27.6% | — |
| R002 | Rural | 567 | 10 | $56,364 | 75.9% | 26.6% | — |
| R003 | Rural | 159 | 5 | $48,083 | 69.7% | 24.4% | — |
| R004 | Rural | 505 | 40 | $45,366 | 59.0% | 25.4% | — |
| R005 | Rural | 204 | 35 | $41,609 | 54.4% | 26.5% | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 75831 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
- 75855 — Oakwood town, TX (10.3 mi)
- 75838 (13 mi)
- 75846 — Jewett city, TX (13.3 mi)
- 75833 — Centerville city, TX (17.2 mi)
- 75860 — Teague city, TX (17.3 mi)
- 77865 — Marquez city, TX (21.4 mi)
- 75886 (21.7 mi)
- 75840 — Fairfield city, TX (21.9 mi)
Areas that include 75831
- Buffalo, TX ZIP codes — 1 ZIP code
- Freestone County ZIP codes — 9 ZIP codes
- Leon County ZIP codes — 8 ZIP codes
- Texas ZIP code data
Where it ranks
- No. 4 of 7: highest share of households with children in Leon County
- No. 4 of 7: highest share of residents who moved in during the past year in Leon County
- No. 4 of 7: lowest median age in Leon County
- No. 4 of 7: highest median age in Leon County
- No. 4 of 6: fastest population growth in Leon County
Mail every home in 75831
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) 75831, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 75831 in?
- 75831 is a Buffalo, TX mailing address. By land area, 2% lies inside Buffalo; the rest is outside any Census-defined city or community.
- What county is 75831 in?
- 75831 is mostly in Leon County (70% of its land), with smaller parts in Freestone County.
- What is the population of 75831?
- About 4,881 people (±660), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 4,865.
- What is the median household income in 75831?
- $51,935 (±$7,182), 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 75831?
- 5 USPS carrier routes with 1,947 residential and 93 business mailboxes (2,040 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 75831?
- The closest, measured center to center: 75855 (10.3 mi, Oakwood), 75838 (13 mi), 75846 (13.3 mi, Jewett), 75833 (17.2 mi, Centerville), 75860 (17.3 mi, Teague) and 77865 (21.4 mi, Marquez).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.