ExxonMobil Oil Joliet Refinery
ExxonMobil Oil Joliet Refinery is a 43 MW power plant in Will County, Illinois, operated by ExxonMobil Oil Corp. EIA-860M lists 3 generating units here, inside PJM. Its units entered service between 1986 and 1987.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Nameplate capacity
- 43.4 MW
- 36.5 MW net summer
- Generating units
- 3
- In service
- 1986–1987
- EIA plant ID
- 50627
Where it is
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- County
- Will County, Illinois
- Coordinates
- 41.4167, -88.1833
- Balancing authority
- PJM
- Sector
- Industrial CHP
Units, technology and status
- Operator of record
- ExxonMobil Oil Corp
- Primary energy source
- Other
- Technologies
- Other Gases
- Status
- Operating (2) · Out of service and NOT expected to return to service in next calendar year (1)
ExxonMobil Oil Joliet Refinery: FAQ
- Where is ExxonMobil Oil Joliet Refinery?
- In Will County, Illinois (IL). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
- How big is ExxonMobil Oil Joliet Refinery?
- 43 MW of nameplate capacity across 3 units, as of the EIA-860M release for 2026-07.
- Who owns ExxonMobil Oil Joliet Refinery?
- EIA-860M names ExxonMobil Oil Corp as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
- Is this the same as ExxonMobil Oil Joliet Refinery LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — ExxonMobil Oil Corp here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "ExxonMobil Oil Joliet Refinery LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is ExxonMobil Oil Joliet Refinery still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.