# Henderson County, Illinois: Power, Data Centers and the Local Economy Home to Oquawka Township, Oquawka and Stronghurst Township Henderson County is not a build-out site today. It feels the boom through the grid it shares, the utilities that serve it and the work nearby. Henderson County is home to Oquawka Township, Oquawka, Stronghurst Township and Gladstone Township. Unemployment was 3.0% in August 2026, against 5.1% in 2019. Next door, Mercer County has 1 data center. Employers here counted 1,176 jobs in 2025, up 8.8% from 2019. 1 MW of that came online in 2019 or later, mostly solar. +8.8% total jobs since 2019, now 1,176 1 MW of operating power plants, mostly solar 15.26¢ per kWh for Ameren Illinois Company residential customers, 2024 ## Cities and towns in Henderson County Henderson County is home to Oquawka Township, Oquawka, Stronghurst Township and Gladstone Township. Oquawka Township1,571 residents Oquawka1,065 residents Stronghurst Township1,004 residents Gladstone Township766 residents Stronghurst760 residents Lomax Township694 residents Biggsville Township515 residents Lomax376 residents Media Township339 residents Biggsville282 residents Raritan Township232 residents Carman Township229 residents Rozetta Township221 residents Gladstone218 residents Terre Haute Township208 residents Bald Bluff Township205 residents Dallas City154 residents · 20% of the city Media110 residents Raritan98 residents - Dallas City also extends into [Hancock County](https://savrn.com/power-supply-chain-map/illinois/hancock-county). Unincorporated communities (governed by the county): Carman. 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 Henderson County | Measure | Then | Now | Change | Rank in Illinois | |---|---|---|---|---| | Population (2020 → 2025) | 6,340 | 5,984 | ▼ 5.6% | 92nd of 102 by size | | Total jobs (2019 → 2025) | 1,081 | 1,176 | ▲ 8.8% | 11th of 102 by growth | | Average annual pay (2019 → 2025) | $29,250 | $47,267 | ▲ 61.6% | — | | Construction jobs (2019 → 2025) | 62 | 47 | ▼ 24.2% | — | | Unemployment rate (2019 → August 2026) | 5.1% | 3.0% | ▼ 2.1pts | — | | Generating capacity added since 2019 | — | 1 MW | | — | | Generating capacity retired since 2019 | — | 0 MW | | — | Its power plants have 1 MW of capacity, 100% of it solar. Ameren Illinois Company is the largest utility serving Henderson County, one of 3 with territory here. Its residential customers paid an average 15.26¢/kWh in 2024. 5,984 people live here, down 5.6% since 2020. ## Who powers Henderson County ### Utilities with service territory in Henderson County | Utility | Ownership | Service | Residential customers (systemwide) | Residential price, 2024 | Commercial share of sales | |---|---|---|---|---|---| | Ameren Illinois Company | Investor Owned | Bundled | 1,060,894 | 15.26¢ | 28% | | McDonough Power Coop | — | — | — | — | — | | Western Illinois Elec Coop | — | — | — | — | — | 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 | Technology | Capacity | Share | |---|---|---| | Solar | 1 MW | 100% | | Largest plants | Owner | Technology | MW | Since | |---|---|---|---|---| | Galesburg Solar Array | Onsite Partners, LLC | Solar | 1 MW | 2020 | ## The Henderson County labor market | Industry (2025) | Jobs | Average pay | Concentration vs U.S. | |---|---|---|---| | All industries | 1,176 | $47,267 | 1.00 | | Construction | 47 | $45,700 | 0.75 | 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 Henderson County No data center, local measure or delayed project is on record in Henderson County. Illinois has 28 local measures on record statewide. ## Henderson County and its neighbors Of the 6 counties that border Henderson County, Mercer 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 | |---|---|---|---|---|---|---| | Henderson County | 5,984 | ▲ 8.8% | 1 MW | — | — | — | | Des Moines County](https://savrn.com/power-supply-chain-map/iowa/des-moines-county) IA | 38,077 | ▼ 6.3% | 291 MW | — | — | — | | Hancock County](https://savrn.com/power-supply-chain-map/illinois/hancock-county) | 16,803 | ▲ 4.6% | — | 2 MW | — | — | | Lee County](https://savrn.com/power-supply-chain-map/iowa/lee-county) IA | 32,306 | ▼ 11.2% | 458 MW | — | — | — | | McDonough County](https://savrn.com/power-supply-chain-map/illinois/mcdonough-county) | 25,916 | ▼ 7.2% | 171 MW | 10 MW | — | — | | Mercer County](https://savrn.com/power-supply-chain-map/illinois/mercer-county) | 15,229 | ▲ 1.0% | 10 MW | 42 MW | 1 | — | | Warren County](https://savrn.com/power-supply-chain-map/illinois/warren-county) | 16,222 | ▼ 0.8% | 35 MW | — | — | — | ## More of Illinois [All Illinois countiesThe state power page and county mapOpen →](https://savrn.com/power-supply-chain-map/illinois)[McDonough County25,916 peopleOpen →](https://savrn.com/power-supply-chain-map/illinois/mcdonough-county)[Hancock County16,803 peopleOpen →](https://savrn.com/power-supply-chain-map/illinois/hancock-county)[Warren County16,222 peopleOpen →](https://savrn.com/power-supply-chain-map/illinois/warren-county)[Mercer County15,229 peopleOpen →](https://savrn.com/power-supply-chain-map/illinois/mercer-county) ## Henderson County, answered from the record ### Who provides electricity in Henderson County, Illinois? 3 utilities have service territory in Henderson County in the EIA-861 2024 report: Ameren Illinois Company, McDonough Power Coop, Western Illinois Elec Coop. The largest, Ameren Illinois Company, charged residential customers 15.26¢/kWh on average in 2024. ### What power plants are in Henderson County? 1 operating plant with 1 MW of capacity. The largest is Galesburg Solar Array (1 MW, solar). ### Are there data centers in Henderson County? The SAVRN Data Center Map has no data center in Henderson County. The nearest activity on record is next door in Mercer County. ### Is Henderson County adding jobs? Employers counted 1,176 jobs in 2025 against 1,081 in 2019 (+8.8%, BLS QCEW). Construction went from 62 to 47. ### Does Henderson County have a data center moratorium? No county-level measure is on record for Henderson County. Illinois has 28 local measures statewide, listed on the state page. --- Canonical: https://savrn.com/power-supply-chain-map/illinois/henderson-county Updated: 2026-10-08. Refreshed weekly by SAVRN from EIA, BLS, BEA, Census and the SAVRN trackers. License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/).