South Side Electric, Inc
Cooperative electric utility · Idaho · #2,562 of 3,199 U.S. utilities by customers · EIA utility #17576
South Side Electric, Inc is a cooperative electric utility serving 868 customers in Idaho. In 2025 it sold 62.5 gigawatt-hours of electricity for $4.72M in revenue, an average realized rate of 7.56¢ per kWh across all customer classes and — per kWh for residential customers. Its reported service territory covers 1 counties.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Total | 868 | 62.5 | $4.72M | 7.56¢ |
Average realized rate = revenue divided by sales as reported on EIA Form 861. It blends fixed charges, demand charges and riders into one per-kWh figure; it is not the utility's tariff rate. Estimated residential bill assumes the average residential customer's actual 2025 usage (— kWh/month).
This utility files the EIA-861S short form, which reports totals only - no breakdown by customer class is published for it.
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 1,060 | 61.0 | $3.84M | — |
| 2022 | 1,058 | 57.9 | $3.93M | — |
| 2023 | 853 | 57.2 | $3.84M | — |
| 2024 | 865 | 61.5 | $4.13M | — |
| 2025 | 868 | 62.5 | $4.72M | — |
Counties served
Cassia, ID
Other large utilities in Idaho
- Idaho Power Co - 657,261 customers, residential 11.78¢
- City of Idaho Falls - (ID) - 34,150 customers, residential 9.60¢
- Kootenai Electric Cooperative - 33,924 customers, residential 13.43¢
- Northern Lights, Inc - 24,325 customers, residential 12.32¢
- Fall River Rural Elec Coop Inc - 21,316 customers, residential 11.10¢
- Clearwater Power Company - 10,730 customers, residential —
- United Electric Co-op, Inc - (ID) - 7,692 customers, residential 8.50¢
- Raft Rural Elec Coop Inc - 5,418 customers, residential 10.68¢
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #17576 in the EIA frame.