Madison County, Idaho: Power, Data Centers and the Local Economy
Home to Rexburg and Sugar City
Madison County sits inside the data center build-out. The SAVRN Data Center Map lists 1 data center in Madison County, 6% of Idaho's total. Madison County is home to Rexburg and Sugar City. Unemployment was 5.5% in August 2026, against 2.6% in 2019. Construction employs 829, up 36.1% since 2019. Employers here counted 17,803 jobs in 2025, up 12.9% from 2019.
Cities and towns in Madison County
Madison County is home to Rexburg and Sugar City.
Residents are 2025 Census estimates for the part of each city, town or township inside this county. Census publishes no annual estimate for unincorporated communities.
What changed in Madison County
1st = the most. Ranks cover counties with a value on record.
| Measure | Then | Now | Change | Rank in Idaho |
|---|---|---|---|---|
| Population (2020 → 2025) | 52,950 | 55,172 | ▲ 4.2% | 7th of 44 by size |
| Total jobs (2019 → 2025) | 15,768 | 17,803 | ▲ 12.9% | 15th of 44 by growth |
| Average annual pay (2019 → 2025) | $32,167 | $43,825 | ▲ 36.2% | — |
| Construction jobs (2019 → 2025) | 609 | 829 | ▲ 36.1% | 19th of 33 by growth |
| Unemployment rate (2019 → August 2026) | 2.6% | 5.5% | ▲ 2.9pts | — |
| Generating capacity added since 2019 | — | 0 MW | — | |
| Generating capacity retired since 2019 | — | 0 MW | — |
Its power plants have 6 MW of capacity, 100% of it natural gas. PacifiCorp is the largest utility serving Madison County, one of 3 with territory here. Its residential customers paid an average 12.11¢/kWh in 2024, above the 10.00¢ median for Idaho utilities. 55,172 people live here, up 4.2% since 2020, 7th of 44 Idaho counties by population.
Who powers Madison County
Utilities with service territory in Madison County
| Utility | Ownership | Service | Residential customers (systemwide) | Residential price, 2024 | Commercial share of sales |
|---|---|---|---|---|---|
| PacifiCorp | Investor Owned | Bundled | 74,170 | 12.11¢ | 16% |
| Fall River Rural Elec Coop Inc | Cooperative | Bundled | 15,433 | 11.11¢ | 36% |
| Bonneville Power Administration | — | — | — | — | — |
Customer counts, prices and sales shares cover each utility's whole system in the state, not only this county. Commercial sales include data centers.
Operating power plants 1
| Technology | Capacity | Share |
|---|---|---|
| Natural gas | 6 MW | 100% |
| Largest plants | Owner | Technology | MW | Since |
|---|---|---|---|---|
| BYUI Central Energy Facility | Brigham Young Univ Idaho | Natural gas | 6 MW | 2015 |
The Madison County labor market
| Industry (2025) | Jobs | Average pay | Concentration vs U.S. |
|---|---|---|---|
| All industries | 17,803 | $43,825 | 1.00 |
| Construction | 829 | $51,352 | 0.88 |
| Data processing and hosting | 43 | $35,470 | 0.78 |
Concentration is the BLS location quotient: 1.0 means the industry holds the same share of local jobs as it does nationally. Industry rows count private employers; cells BLS suppresses are left out.
Data centers and local rules in Madison County
1 data center in Madison County is on the SAVRN Data Center Map.
Madison County and its neighbors
Of the 4 counties that border Madison County, Bonneville County carries the most build-out activity: data centers, planned generation and operating plants combined.
| County | Population | Jobs since 2019 | Operating MW | Planned MW | Data centers | Local measures |
|---|---|---|---|---|---|---|
| Madison County | 55,172 | ▲ 12.9% | 6 MW | — | 1 | — |
| Bonneville County | 135,771 | ▲ 18.7% | 611 MW | 359 MW | — | — |
| Fremont County | 14,208 | ▲ 21.2% | 24 MW | — | — | — |
| Jefferson County | 35,297 | ▲ 18.6% | 2 MW | — | — | — |
| Teton County | 13,254 | ▲ 38.4% | 7 MW | — | — | — |
More of Idaho
Madison County, answered from the record
Who provides electricity in Madison County, Idaho?
3 utilities have service territory in Madison County in the EIA-861 2024 report: PacifiCorp, Fall River Rural Elec Coop Inc, Bonneville Power Administration. The largest, PacifiCorp, charged residential customers 12.11¢/kWh on average in 2024.
What county is Rexburg, ID in?
Rexburg is in Madison County, Idaho. About 40,334 people live there (2025 Census estimate).
What power plants are in Madison County?
1 operating plant with 6 MW of capacity. The largest is BYUI Central Energy Facility (6 MW, natural gas).
Are there data centers in Madison County?
Yes. The SAVRN Data Center Map lists 1 data center in Madison County.
Is Madison County adding jobs?
Employers counted 17,803 jobs in 2025 against 15,768 in 2019 (+12.9%, BLS QCEW). Construction went from 609 to 829.
Does Madison County have a data center moratorium?
No county-level measure is on record for Madison County. Idaho has 4 local measures statewide, listed on the state page.