Texas · EIA utility 28978 · Full-service utility
City of San Marcos (TX) electricity rates in Texas, 2025
City of San Marcos (TX)’s 22,362 residential customers paid an average of 12.73¢ per kWh in 2025, 17% below the Texas average of 15.40¢. The typical home used 915 kWh a month, for an average bill of $116.
- 12.73¢avg ¢/kWh (2025)+0.70¢ (+5.8%) vs 2024
- $116Avg monthly billTexas: $171
- 915 kWhAvg monthly useTexas: 1,110 kWh
- 22,362Residential customersFull-service utility
| Sector | Customers | Sales (MWh) | Revenue | ¢/kWh 2025 | ¢/kWh 2024 | Change |
|---|---|---|---|---|---|---|
| Residential | 22,362 | 245,552 | $31,253,000 | 12.73¢ | 12.03¢ | +0.70¢ (+5.8%) |
| Commercial | 3,790 | 403,783 | $44,076,000 | 10.92¢ | 10.47¢ | +0.45¢ (+4.3%) |
| Industrial | 2 | 2,052 | $215,000 | 10.48¢ | 9.91¢ | +0.57¢ (+5.7%) |
| All sectors | 26,154 | 651,387 | $75,544,000 | 11.60¢ | 11.05¢ | +0.54¢ (+4.9%) |
How City of San Marcos (TX) compares
- Texas residential average, 2025: 15.40¢ per kWh, 1,110 kWh a month, $171 average bill. U.S. average: 17.23¢, 874 kWh, $151.
- Among 130 full-service utilities in Texas with at least 1,000 residential customers, City of San Marcos (TX) ranks 43 of 130 from lowest to highest average price.
- Latest monthly figure: Texas homes paid 15.91¢ per kWh in August 2026 (preliminary), against 15.40¢ in August 2025. Summer months often run higher than the annual average.
- From 2024 to 2025 this average rose 5.8%; the state average rose 3.1%.
- City of San Marcos (TX) is a municipal utility, owned by the local government; the city council or utility board sets rates. Balancing authority: ERCO.
Where City of San Marcos (TX) serves
EIA lists 1 Texas county in its 2025 service territory: Hays.
2 ZIP codes are matched to City of San Marcos (TX) in NREL’s 2024 ZIP file: 78666, 78667. Utility boundaries do not follow ZIP lines, so a ZIP can have more than one provider.
Texas full-service utilities with similar rates
| Provider | ¢/kWh | Avg bill | Customers |
|---|---|---|---|
| Southwestern Electric Power Co | 12.60¢ | $146 | 157,119 |
| Hamilton County Elec Coop Assn | 12.64¢ | $127 | 19,876 |
| Upshur Rural Elec Coop Corp | 12.71¢ | $154 | 44,971 |
| Pedernales Electric Coop, Inc | 12.75¢ | $153 | 420,753 |
| Bandera Electric Coop, Inc | 12.77¢ | $152 | 35,906 |
| Weatherford Mun Utility System | 12.80¢ | $147 | 14,661 |
| Wood County Electric Coop, Inc | 12.83¢ | $143 | 36,173 |
| Tesla Energy Ventures | 12.83¢ | $208 | 11,432 |
Sources
- U.S. Energy Information Administration, Annual Electric Power Industry Report, Form EIA-861, 2025 final data (f8612025.zip, file dated October 7, 2026): Sales to Ultimate Customers, Average Monthly Bill and Service Territory tables.
- EIA Form EIA-861, 2024 final data (f8612024.zip, file dated December 4, 2025), for the 2024 comparison.
- EIA Electric Power Monthly, Table 5.6.A (average price by state, August 2026 and August 2025; 2026 values are preliminary), file dated October 22, 2026.
- National Renewable Energy Laboratory via OpenEI, U.S. Electric Utility Companies and Rates: Look-up by Zipcode (2024) (investor-owned and other utilities, files dated November 10, 2025), used only to match ZIP codes to utilities.
Average price = residential revenue ÷ residential kWh sold, as reported to EIA. It includes fixed monthly charges, taxes passed through in revenue and seasonal tiers, averaged over the year. Your own rate depends on your tariff and usage.