Alaska has 146 electrical substations recorded in the federal Homeland Infrastructure Foundation-Level Data (HIFLD) dataset — the facilities where voltage is stepped up, stepped down, or switched as electricity moves across the power grid.
Use the interactive map below to explore every substation in Alaska, color-coded by voltage class. Search any address or ZIP code to find substations near you, or click any point for its voltage, connected line count, and operational status. To see the rest of the country, view the full US substations map.
Alaska Substations by the Numbers
- 146 total electrical substations in Alaska
- 92 high-voltage transmission substations (100-345 kV)
- 4 distribution substations (under 100 kV) — stepping voltage down for local delivery
- 129 currently listed as in service
Where Alaska’s Substations Are
Alaska’s substations are spread across the state, but cluster around its main load centers and generation hubs. The areas with the most substations are Anchorage (37), Kenai Peninsula (21), Fairbanks North Star (20), Matanuska-Susitna (14), and Juneau (9).
Alaska’s Transmission and Distribution Grid
Of Alaska’s 146 substations, 92 (about 63%) operate at transmission voltages of 100 kV or higher. The remaining substations operate at distribution voltages, stepping power down to the levels used on the local lines that serve homes and businesses.
Frequently Asked Questions
How many electrical substations are in Alaska?
Alaska has 146 electrical substations recorded in the federal HIFLD dataset, of which 129 are listed as in service.
What is the highest substation voltage in Alaska?
Alaska’s highest-voltage substations operate at up to 230 kV.
Where are most of Alaska’s substations?
Alaska’s substations are most concentrated around Anchorage, with 37 substations, followed by Kenai Peninsula and Fairbanks North Star.
Does this map show every substation in Alaska?
It shows the 146 substations recorded in the HIFLD dataset. Coverage of the transmission grid is comprehensive, but some smaller distribution substations, private facilities, and very recently built substations may not appear.
→ Explore all 55,476 electrical substations on the US substations map
