Residential delivery area · Texas
ZIP Code 78623: Fischer, TX
ZIP code 78623 uses the postal name Fischer, Texas and lies mostly in Comal County (92% of its land) with the rest in Hays County (Census 2020 ZIP-county file). About 1,600 people live there (Census Bureau, ACS 2020-2024). Median household income is $116,923 (Census Bureau, ACS 2020-2024). By Census place, 48% of its land lies in Canyon Lake (a census-designated place); 52% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Fischer · its only residential ZIP
- County
- Comal County (92%); Hays County (8%)
- Census places
- Canyon Lake census-designated place
- Metro area
- San Antonio-New Braunfels, TX
- House district
- TX-21 119th Congress
- State
- Texas
- Time zone
- Central
- Land area
- 22.4 sq mi · 73 people per sq mi
Where is ZIP code 78623?
78623 centers on 29.955°, -98.217° and covers 22.4 square miles of land plus 0.0 of water. It borders 5 ZIP codes: 78133, 78676, 78070, 78666, 78606.
The map draws ZIP code areas only. For the streets inside 78623, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 78623 compare with the rest of Comal County?
| Measure | 78623 | In Comal County | In TX |
|---|---|---|---|
| People (ACS 2020-2024) | 1,645 | 13th of 13 | 1,329th of 1,990 |
| Median household income | $117k | not ranked | not ranked |
| Median home value | $450k | 6th of 13 | 139th of 1,172 |
78623's median household income is not ranked: its 90% margin of error (±$50,025) is more than a quarter of the figure ($116,923). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 49% of U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 78623?
The 2020 Census counted 1,670 people in 78623; the ACS, which samples households over 2020-2024, estimates 1,645. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 1,645±397 (90% margin)
- 2020 Census count
- 1,670
- Households
- 638
- Median age
- 60.0
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 78623?
Of the 1,645 people the ACS estimates in 78623, 18.4% are under 18 and 35.0% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (81.9%).
- Under 1818.4%
- 18 to 6446.6%
- 65 and older35.0%
- White, not Hispanic81.9%
- Hispanic or Latino7.9%
- Other or two or more7.4%
- Asian, not Hispanic2.8%
- Black, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 78623 earn?
Median household income is $116,923 (ACS 2020-2024).
- Median household income
- $116,923±$50,025
- Income per person
- $54,836
- Below the poverty line
- 4.2%
- Unemployed (of the labor force)
- 5.3%
- Adults 25+ with a bachelor's degree
- 41.6%
- Adjusted gross income per tax return, 2022
- $100,0351,170 returns; wages 53% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 78623?
FHFA's house price index for 78623, built from repeat sales and appraisals of the same homes, rose 112% from 2015 to 2025 and rose 72% from 2020 to 2025, and moved +13.2% in 2025.
- Median home value (owners' estimate)
- $449,600
- Median gross rent
- –
- Homes owned by their occupants
- 100.0%
- Housing units
- 721
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 78623?
35 business establishments had a location in this ZIP code in 2023, 11 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction11
- Other services (except public administration)5
- Health care and social assistance4
- Retail trade3
- Administrative and support and waste management and remediation services3
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 78623?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 78133 | Canyon Lake | 21,959 | $84k | 5.4 mi |
| 78676 | Wimberley | 15,822 | $87k | 6.7 mi |
| 78070 | Spring Branch | 20,200 | $115k | 12.3 mi |
| 78666 | San Marcos | 88,583 | $55k | 14.8 mi |
| 78606 | Blanco | 7,272 | $95k | 17.0 mi |
| 78132 | New Braunfels | 40,953 | $135k | 13.7 mi (near) |
| 78619 | Driftwood | 6,693 | $183k | 15.5 mi (near) |
| 78163 | Bulverde | 19,141 | $141k | 18.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.