78623 ZIP Code, Fischer, TX
78623 is a ZIP code in Fischer, Texas — mostly in Comal County (92% of its land), with smaller parts in Hays County. It covers 22 square miles of land, centered about 40 miles northeast of downtown San Antonio. The closest ZIP codes are 78133, 78676 and 78070. 1,645 people live here in 638 households. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (100%). Median household income is $116,923, above the Texas median of $78,476; the median age is 60.0, older than most ZIP codes.
Quick facts
- Mailing city: Fischer, TX
- County: Comal County
- Metro area: San Antonio
- Land area: 22 sq mi
- Population: 1,645
- Median household income: $116,923
- Carrier routes: 1 (1,091 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 1,645 |
| Households | 638 |
| Median household income | $116,923 |
| Income per person | $54,836 |
| Median age | 60 |
| Homeowners | 100.0% |
| Median home value | $449,600 |
| Median rent | not published |
| Bachelor's degree or higher | 41.6% |
| Average commute (minutes) | 37.3 |
| Households with kids under 18 | 19.6% |
| Moved in the past year | 5.6% |
| Below the poverty line | 4.2% |
| Broadband internet | 98.0% |
| Speak a non-English language at home | 4.5% |
Household income
| % of households | Value |
|---|---|
| <$10K | 1.7% |
| $10–15K | 0.0% |
| $15–25K | 2.4% |
| $25–35K | 2.0% |
| $35–50K | 9.1% |
| $50–75K | 4.1% |
| $75–100K | 12.1% |
| $100–150K | 26.8% |
| $150–200K | 20.1% |
| $200K+ | 21.8% |
Age
| % of all residents | Value |
|---|---|
| <10 | 14.4% |
| 10–19 | 3.9% |
| 20–24 | 1.5% |
| 25–34 | 3.4% |
| 35–44 | 13.4% |
| 45–54 | 3.2% |
| 55–64 | 25.2% |
| 65–74 | 25.5% |
| 75+ | 9.6% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 37.3% |
| Owned outright | 51.2% |
| Rented | 0.0% |
| Vacant | 11.5% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 98.6% |
| Townhome | 0.0% |
| 2–4 units | 0.0% |
| 5–19 units | 1.4% |
| 20+ units | 0.0% |
| Mobile / other | 0.0% |
Businesses in 78623
35 business establishments with 176 employees (ZIP Codes Business Patterns 2023).
- Construction: 11
- Other Services (except Public Administration): 5
- Health Care and Social Assistance: 4
- Retail Trade: 3
- Administrative and Support and Waste Management and Remediation Services: 3
EDDM carrier routes
78623 has 1 USPS carrier routes with 1,091 residential and 11 business mailboxes. Open the EDDM route map.
Carrier routes in 78623
78623 has 1 USPS carrier routes (1 highway contract (H)) with 1,091 residential and 11 business mailboxes. Routes range from 1,091 homes (H001) to 1,091 homes (H001); the median route has 1,091 homes. The Census counted 638 households in 78623 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 0 |
| 500–749 | 0 |
| 750–999 | 0 |
| 1,000–1,499 | 1 |
| 1,500+ | 0 |
Every carrier route in 78623
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| H001 | Highway contract | 1,091 | 11 | $117,098 | 96.7% | 15.9% | 3.0% |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 78623 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
- 78133 — Canyon Lake CDP, TX (5.4 mi)
- 78676 — Wimberley city, TX (6.7 mi)
- 78070 — Canyon Lake CDP, TX (12.3 mi)
- 78132 — Canyon Lake CDP, TX (13.7 mi)
- 78666 — San Marcos city, TX (14.8 mi)
- 78619 — Driftwood CDP, TX (15.5 mi)
- 78606 — Blanco city, TX (17 mi)
- 78163 — Bulverde city, TX (18.6 mi)
Areas that include 78623
- Canyon Lake, TX ZIP codes — 4 ZIP codes
- Fischer, TX ZIP codes — 1 ZIP code
- Comal County ZIP codes — 9 ZIP codes
- San Antonio ZIP code map — 121 ZIP codes
- Texas ZIP code data
Where it ranks
- No. 14 of 104: highest median household income in the San Antonio area
- No. 16 of 101: highest median home value in the San Antonio area
- No. 1 of 104: highest share of owner-occupied homes in the San Antonio area
- No. 2 of 104: highest median age in the San Antonio area
- No. 9 of 104: fastest population growth in the San Antonio area
- No. 5 of 9: highest median household income in Comal County
- No. 5 of 9: highest median home value in Comal County
- No. 1 of 9: highest share of owner-occupied homes in Comal County
- No. 1 of 9: highest median age in Comal County
- No. 3 of 9: fastest population growth in Comal County
Mail every home in 78623
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) 78623, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 78623 in?
- 78623 is a Fischer, TX mailing address. By land area, 48% lies inside Canyon Lake; the rest is outside any Census-defined city or community.
- What county is 78623 in?
- 78623 is mostly in Comal County (92% of its land), with smaller parts in Hays County.
- What is the population of 78623?
- About 1,645 people (±397), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 1,670.
- What is the median household income in 78623?
- $116,923 (±$50,025), 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 78623?
- 1 USPS carrier routes with 1,091 residential and 11 business mailboxes (1,102 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 78623?
- The closest, measured center to center: 78133 (5.4 mi, Canyon Lake), 78676 (6.7 mi, Wimberley), 78070 (12.3 mi, Canyon Lake), 78132 (13.7 mi, Canyon Lake), 78666 (14.8 mi, San Marcos) and 78619 (15.5 mi, Driftwood).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.