ZIP 78504 is in Hidalgo County, where EIA-861 records Oncor and AEP Texas Central beside 1 utility 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 2026-11-14.
OpenStream is not yet registered as a broker with the PUCT and earns nothing from any retailer. How we are paid.
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.
The Census records McAllen in ZIP 78504, in Hidalgo County. The fuller page for this ZIP is Electricity in McAllen.
Which counties it is in and which delivery utilities serve them.