13.12¢
per kWh, 2025
[ City of Longmont / CO ]
City of Longmont electricity rates in Colorado
NO RATE CASE ON FILE · DATA 2025
change in average rate, 2024→2025
+6.7%
vs 2024
41,483
residential customers
+28.0%
since 2020
What your bill becomes
Bill today
No change on file
Difference / month · / year
Estimated at City of Longmont's average effective residential rate (13.12¢/kWh, EIA, all charges included). Your tariff, fees and taxes differ.
Rate history 2015–2025
| Year | ¢/kWh | Change | Customers |
|---|---|---|---|
| 2015 | 9.40¢ | — | 35,465 |
| 2016 | 9.29¢ | −1.2% | 35,721 |
| 2017 | 9.71¢ | +4.5% | 36,392 |
| 2018 | 9.70¢ | −0.1% | 37,326 |
| 2019 | 9.73¢ | +0.3% | 38,463 |
| 2020 | 10.25¢ | +5.3% | 39,186 |
| 2021 | 10.81¢ | +5.5% | 39,688 |
| 2022 | 11.09¢ | +2.6% | 39,986 |
| 2023 | 11.59¢ | +4.5% | 40,386 |
| 2024 | 12.30¢ | +6.1% | 40,855 |
| 2025 | 13.12¢ | +6.7% | 41,483 |
How this compares
15.69¢
Colorado average, 2025
−16.4%
City of Longmont vs CO 2025 average
−23.9%
vs US 2025 average
#28
priciest in CO
Serves 2 counties in Colorado: Boulder, Weld. 4 ZIP codes.
Questions
Is City of Longmont raising rates in 2026?
No rate case for City of Longmont is on file with the Colorado Public Utilities Commission in our tracker. Its average residential rate moved +6.7% from 2024 to 2025. We check the commission docket monthly.
What does City of Longmont charge per kWh?
City of Longmont's average effective residential rate was 13.12¢ per kWh in 2025 (EIA-861, revenue divided by sales, all charges included). Colorado's 2025 average was 15.69¢.
How much have City of Longmont rates gone up in five years?
+28.0% between 2020 and 2025, against +27.0% for Colorado as a whole over the latest five-year window.
How many customers does City of Longmont have in Colorado?
41,483 residential customers in 2025, across 2 counties including Boulder, Weld, according to the EIA-861 survey.
Where do these numbers come from?
Rates and customer counts are from the US Energy Information Administration's annual EIA-861 survey; rate-case facts are from the Colorado Public Utilities Commission docket linked on this page. Nothing here is a utility bill; use it to understand the direction and size of changes.
Sources
- EIA-861 Sales to Ultimate Customers, 2015–2025 (released 2026-10-07)
- EIA-861M monthly state averages through Jul 2026
- NREL utility-by-ZIP lookup (2024)