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United States · Texas · electricity · Prices checked 13 November 2026 · re-read daily

Electricity in ZIP 78640

ZIP 78640 is in Hays County and Caldwell County and Travis County, where EIA-861 records Oncor and AEP Texas Central beside 7 utilities whose customers cannot choose a retailer; the delivery utility on your bill decides which applies. Cheapest at 1,000 kWh: Oncor: AP GAS & ELECTRIC (TX) LLC Simple Saver 3 at 6.2¢/kWh (a bill credit or minimum-usage fee applies); AEP Texas Central: AP GAS & ELECTRIC (TX) LLC Simple Saver 3 at 5.7¢/kWh (a bill credit or minimum-usage fee applies), as listed on Power to Choose on 2026-11-13.

Rank at500 kWh1,000 kWh2,000 kWh

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Who delivers here

  • Hays County
    • Bluebonnet Electric Coop, Inc · co-op, municipal or outside the competitive market: no retailer choice
    • Pedernales Electric Coop, Inc · co-op, municipal or outside the competitive market: no retailer choice
    • City of San Marcos - (TX) · co-op, municipal or outside the competitive market: no retailer choice
  • Caldwell County
    • Bluebonnet Electric Coop, Inc · co-op, municipal or outside the competitive market: no retailer choice
    • AEP Texas Central · competitive delivery utility: you choose the retailer
    • Guadalupe Valley Elec Coop Inc · co-op, municipal or outside the competitive market: no retailer choice
    • City of Lockhart - (TX) · co-op, municipal or outside the competitive market: no retailer choice
    • City of Luling - (TX) · co-op, municipal or outside the competitive market: no retailer choice
    • Pedernales Electric Coop, Inc · co-op, municipal or outside the competitive market: no retailer choice
  • Travis County
    • Austin Energy · co-op, municipal or outside the competitive market: no retailer choice
    • Bluebonnet Electric Coop, Inc · co-op, municipal or outside the competitive market: no retailer choice
    • Pedernales Electric Coop, Inc · co-op, municipal or outside the competitive market: no retailer choice
    • Oncor · competitive delivery utility: you choose the retailer

Counties from the Census 2020 ZCTA-to-county file (largest land share first); utilities from EIA-861 2024 Service Territory, both read 2026-11-06.

Cheapest at 1,000 kWh on each zone here

  1. 1. AP GAS & ELECTRIC (TX) LLC · Simple Saver 3 on Oncor
    6.2¢/kWh at 1,000 kWh
    19.1¢/kWh at 500 kWh, 12.2¢/kWh at 2,000 kWh · bill credit at 1,000 kWh · fixed · 3 months
    Go to AP GAS & ELECTRIC (TX) LLC
  2. 2. Budget Power · Prime 12 on Oncor
    6.6¢/kWh at 1,000 kWh
    19.5¢/kWh at 500 kWh, 12.7¢/kWh at 2,000 kWh · bill credit at 1,000 kWh · fixed · 12 months
    Go to Budget Power
  3. 3. AP GAS & ELECTRIC (TX) LLC · SimpleSaver 12 on Oncor
    6.7¢/kWh at 1,000 kWh
    19.6¢/kWh at 500 kWh, 12.7¢/kWh at 2,000 kWh · bill credit at 1,000 kWh · fixed · 12 months
    Go to AP GAS & ELECTRIC (TX) LLC
  4. 4. CHARIOT ENERGY · GridPlus 12 on Oncor
    6.8¢/kWh at 1,000 kWh
    19.7¢/kWh at 500 kWh, 12.9¢/kWh at 2,000 kWh · bill credit at 1,000 kWh · fixed · 12 months
    Go to CHARIOT ENERGY
  5. 5. Express Energy · Flash Value 12 on Oncor
    7.4¢/kWh at 1,000 kWh
    20.3¢/kWh at 500 kWh, 13.5¢/kWh at 2,000 kWh · bill credit at 1,000 kWh · fixed · 12 months
    Go to Express Energy
  6. 1. AP GAS & ELECTRIC (TX) LLC · Simple Saver 3 on AEP Texas Central
    5.7¢/kWh at 1,000 kWh
    18.5¢/kWh at 500 kWh, 11.8¢/kWh at 2,000 kWh · bill credit at 1,000 kWh · fixed · 3 months
    Go to AP GAS & ELECTRIC (TX) LLC
  7. 2. AP GAS & ELECTRIC (TX) LLC · SimpleSaver 12 on AEP Texas Central
    5.9¢/kWh at 1,000 kWh
    18.7¢/kWh at 500 kWh, 12.0¢/kWh at 2,000 kWh · bill credit at 1,000 kWh · fixed · 12 months
    Go to AP GAS & ELECTRIC (TX) LLC
  8. 3. CHARIOT ENERGY · GridPlus 12 on AEP Texas Central
    6.0¢/kWh at 1,000 kWh
    18.9¢/kWh at 500 kWh, 12.1¢/kWh at 2,000 kWh · bill credit at 1,000 kWh · fixed · 12 months
    Go to CHARIOT ENERGY
  9. 4. Express Energy · Flash Value 12 on AEP Texas Central
    6.8¢/kWh at 1,000 kWh
    19.6¢/kWh at 500 kWh, 12.9¢/kWh at 2,000 kWh · bill credit at 1,000 kWh · fixed · 12 months
    Go to Express Energy
  10. 5. SPARK ENERGY LLC · Sure Saver 12 on AEP Texas Central
    7.6¢/kWh at 1,000 kWh
    17.9¢/kWh at 500 kWh, 12.4¢/kWh at 2,000 kWh · bill credit at 1,000 kWh · fixed · 12 months
    Go to SPARK ENERGY LLC

Places in ZIP 78640

The Census records Kyle, Niederwald, Uhland, Creedmoor, Mountain City in ZIP 78640, in Hays County and Caldwell County and Travis County.

KyleNiederwaldUhlandCreedmoorMountain CityHays CountyCaldwell CountyTravis CountyEvery plan on OncorEvery plan on AEP Texas Central

Another ZIP

Which counties it is in and which delivery utilities serve them.

Says which counties the ZIP is in and which delivery utilities serve them, from the Census and EIA-861. Which one serves your address is on your bill.