
As the solar industry booms, it’s challenging to identify the largest solar farm in each U.S. state, Canadian province, and their territories. This is due to the near constant announcements of upcoming new facilities, as well as the headwinds that they can encounter during financing, site approval, and the regulatory approval process. As a result, the list below tries to traverse the myriad of solar projects to identify those that have been completed, have been approved, or are actually under construction to make the list as up-to-date as possible.

The most interesting factoid derived from this list is that the largest solar farm in the two nations is under development in Indiana (not a place one would normally expect) and will provide 1.3 gigawatts of power when fully completed in 2024.
Any additions, corrections, or suggestions are most welcome and the list will be updated from time to time.
ALABAMA: Muscle Shoals Solar Farm – Muscle Shoals (2021) = 227 MW
ALASKA: Willow Solar Farm – Willow (2019) = 1.2 MW, although a 20 MW farm proposed on Kenai Peninsula
ALBERTA: Travers Solar Farm – Lomond (2022) = 465 MW
AMERICAN SAMOA: Ta’u Island Solar Farm (2016) = 1.4 MW
ARIZONA: Agua Caliente Solar Farm – Yuma (2014) = 286 MW
ARKANSAS: Searcy (2021) = 100 MW
BRITISH COLUMBIA: Old Mine Solar Farm – Kimberley (2017) = 1.68 MW
CALIFORNIA: Solar Star Farm – Bakersfield area (2014) = 679 MW
COLORADO: Bighorn Solar Farm – Pueblo (2021) = 300 MW on 1,800 acres
CONNECTICUT: Gravel Pit Solar Farm – (2023) = 120 MW on 485 acres
DELAWARE: Milford Solar Park – Milford (2012) = 15 MW on 80 acres
DISTRICT OF COLUMBIA: Oxon Run Community Solar Farm (2021) = 2.65 MW on 15 acres
FLORIDA: multiple solar farms at 74.9/75 MW including Martin County Solar Farm (2010), Bay Trail Solar Farm in Citrus County, Fort Green Solar Farm in Hardee County, Hildreth Solar Farm in Suwannee County, Bay Ranch Solar Farm in Bay County, Hardeetown Solar Farm in Levy County, St. Cloud Solar Farm in Osceola County, and High Springs Solar Farm in Alachua County.
GEORGIA: Jefferson County (2023) = 260 MW
GUAM: Dan Dan Solar Farm (2015) = 25 MW
HAWAII: Kawailoa Solar Farm – Oahu (2019) = 49 MW on 110 acres
IDAHO: Grandview Solar Farm (2016) = 80 MW; although a 120 MW solar farm is under development near Twin Falls (2023) and 300MW solar farm is proposed in Power County near American Falls on 6,500 acres
ILLINOIS: Double Black Diamond Solar Farm – Sangamon County (2023) 593 MW on 4,100 acres
INDIANA: Mammoth Solar Farm – Starke & Pulaski Counties (2024) = 1.3 GW on 13,000 acres to be completed in three (3) phases
IOWA: Wapello Solar Farm – Wapello (2021) = 127.5 MW on 800 acres, although the Duane Arnold Solar Farm is seeking approval in Palo (2024) = 200 MW on 3,500 acres with another 200 MW planned for the future
KANSAS: West Gardner Solar Farm – Gardner (2023) = 320 MW on 2,000 acres
KENTUCKY: Martin County Solar Farm – Martin County (2024) = 200 MW on 1,200 acres
LOUISIANA: Ventress Solar Farm – Pointe Coupee Parish (2023) = 300 MW on 1,800 acres
MAINE: Farmington Solar Farm (2021) = 76.5 MW on 490 acres
MANITOBA: Fisher Creek Cree Nation Solar Farm (2020) = 1.0 MW
MARYLAND: Great Bay Solar Farm – Somerset = 100 MW, although a 175 MW solar farm is proposed at a former mine in Kitzmiller
MASSACHUSETTS: Happy Hollow Solar Farm – Harvard (2019) = 7.1 MW
MICHIGAN: Assembly Solar Farm – Shiawassee County (2021) = 50 MW with plans to expand to 239MW
MINNESOTA: North Star Solar Farm – Chisago County = 100 MW on 1,000 acres
MONTANA: Cabin Creek Solar Farm – Fallon County (2023) = 150 MW
NEBRASKA: Salt Creek Solar Farm – Lincoln area (2023) = 250 MW on 3,000 acres
NEVADA: Gemini Solar Farm – NW of Las Vegas (2022) = 440 MW with plan to expand to 690 MW
NEW BRUNSWICK: Shediac Solar Farm (2022) = 1.63 MW
NEWFOUNDLAND & LABRADOR: none identified
NEW HAMPSHIRE: Chinook Solar Farm – Fitzwilliam (2022) = 30 MW on 600 acres
NEW JERSEY: Tinton Falls Solar Farm – Tinton Falls (2020) = 19.8 MW
NEW MEXICO: Arroyo Solar Farm – McKinley County (2022) = 150 MW with Atrisco Solar Farm proposed in Rio Rancho (2024) = 400 MW on 3,100 acres
NEW YORK: Byron Solar Farm (2023) = 280 MW on 3,443 acres
NORTH CAROLINA: Fern Solar Farm – Edgecomb County = 100 MW
NORTH DAKOTA: Cannon Ball Solar Farm – Standing Rock (2019) = 300 MW
NORTHWEST TERRITORIES: Fort Simson Solar Farm = 100 kW
NUNAVUT: none identified
NOVA SCOTIA: Berwick Solar Farm (2022) = 4.8 MW
OHIO: Amazon Solar Farm – Hillcrest (2021) = 200 MW
OKLAHOMA: Skeleton Creek Solar Farm – Enid (2023) = 200 MW on 2,500 acres
ONTARIO: Sarnia Solar Farm (2009) = 97 MW on 1,100 acres
OREGON: Gilliam County (2023/4) = 162 MW with Obsidian Solar Farm proposed – Christmas Valley = 400 MW
PENNSYLVANIA: PSU Solar Farm – Franklin County (2020) = 70 MW on 500 acres
PRINCE EDWARD ISLAND: Sun Bank Solar Farm – Summerside (2022) = 21 MW on 74 acres
PUERTO RICO: Oriana Solar Farm – Isabella (2016) = 45 MW
QUEBEC: Gabrielle-Bodis Solar Farm – La Prairie (2021) = 8 MW on 37 acres
RHODE ISLAND: Iron Mine Hill Solar Farm – North Smithfield (2021) = 38.4 MW on 420 acres
SASKATCHEWAN: Highfield Solar Farm – Swift Current (2021) = 10 MW
SOUTH CAROLINA: Solvay Solar Farm – Jasper County (2017) = 71.4 MW on 900 acres
SOUTH DAKOTA: Wild Springs Solar Farm – Pennington County (2022) = 128 MW
TENNESSEE: Millington Naval Air Station (2019) = 53 MW on 72 acres
TEXAS: Roadrunner Solar Farm – Upton County (2019) = 497 MW
U.S. VIRGIN ISLANDS: St. Croix Solar Farm (2022) = 18 MW
UTAH: Elektron Solar Farm – Rowley (2022) = 80 MW
VERMONT: Coolidge Solar Farm – Ludlow (2018) = 20 MW on 150 acres
VIRGINIA: Spotsylvania Solar Farm – Spotsylvania County (2021) = 484 MW on 6,350 acres
WAKE ISLAND: US Air Force Base Solar Farm 2017) = 750 kW
WASHINGTON: Lund Solar Farm – Klickitat County (2021) = 150 MW on 1,100 acres
WEST VIRGINIA: SunPark Solar Farm – Boone and Lincoln Counties (2024) = 250 MW on 3,000 acres
WISCONSIN: Koshkonong Solar Farm – Dane County (2024) = 300 MW on 4,600 acres
WYOMING: Sweetwater Solar Farm – Green River (2019) = 97.9 MW
YUKON: North Klondike Solar Farm (2021) – 1.86 MW
_______
If solar energy interests you, here are links to a couple of books on the topic available thru Amazon.com.*


*A small commission is earned from purchases that are made using the above links to Amazon. As an Amazon Associate, I earn from qualifying purchases.
SOURCES:
- https://pv-magazine-usa.com/2021/09/20/project-enters-service-in-alabama-nearly-doubling-the-states-installed-solar-capacity/
- https://www.intelligentliving.co/alaskas-largest-solar-farm/
- https://www.homernews.com/news/company-looks-to-build-solar-farm-on-peninsula/
- https://www.cbc.ca/news/canada/calgary/travers-solar-project-vulcan-1.6233629
- https://www.renewableenergyworld.com/om/this-old-mine-is-now-british-columbia-s-largest-solar-farm/#gref
- https://dailyenergyinsider.com/news/25309-entergys-searcy-solar-project-in-arkansas-gets-go-ahead/
- https://en.wikipedia.org/wiki/Solana_Generating_Station
- https://constructionreviewonline.com/biggest-projects/top-5-biggest-solar-farms-in-the-us/
- https://www.power-technology.com/projects/bighorn-solar-project-colorado/
- https://electrek.co/2021/03/02/egeb-connecticut-largest-solar-farm-northeast/
- delawareonline.com
- https://dgs.dc.gov/release/bowser-administration-celebrates-completion-oxon-run-community-solar-farm
- https://en.wikipedia.org/wiki/Solar_power_in_Florida
- https://www.ajc.com/news/business/massive-georgia-solar-energy-project-coming-to-south-georgia/MOOKLHOFLBAM7NYQUOKKETPFZ4/
- https://en.wikipedia.org/wiki/Solar_power_in_Hawaii
- https://goodfellowbros.com/project/kawailoa-solar/
- https://www.illinoistimes.com/springfield/county-approves-major-solar-power-project/Content?oid=14387101
- https://www.indystar.com/story/news/environment/2021/11/09/indiana-solar-panel-farm-largest-united-states-doral-renewables-energy-mammoth-starke-county/8529759002/
- https://grist.org/energy/the-countrys-biggest-solar-farm-is-coming-to-one-of-the-coal-friendliest-states/
- https://www.desmoinesregister.com/story/money/business/2021/11/02/alliant-energy-invest-750-million-largest-iowa-solar-battery-storage-project/6233896001/
- https://www.kcur.org/news/2021-07-29/johnson-county-could-get-the-largest-solar-farm-in-kansas-heres-what-we-know-so-far
- https://www.canarymedia.com/articles/solar/biggest-solar-farm-in-louisiana-gets-warm-welcome-from-local-community
- https://www.usnews.com/news/best-states/maine/articles/2021-11-21/new-englands-biggest-solar-project-is-catching-some-rays
- https://www.usnews.com/news/best-states/maine/articles/2021-11-21/new-englands-biggest-solar-project-is-catching-some-rays
- https://www.ebmag.com/fisher-river-cree-nation-unveils-manitobas-biggest-solar-farm/
- https://en.wikipedia.org/wiki/Solar_power_in_Massachusetts
- https://thumbwind.com/michigan-solar-farm-installations-map/
- https://www.bizjournals.com/twincities/news/2016/10/18/minnesotas-largest-solar-farm-about-to-open-heres.html
- https://pv-magazine-usa.com/2021/05/06/greenbacker-buys-one-of-montanas-largest-solar-projects/
- https://www.1011now.com/2021/12/18/ranger-power-works-bring-nebraskas-largest-solar-farm-eastern-lancaster-county/
- https://www.smithsonianmag.com/smart-news/solar-energy-project-nevada-will-be-biggest-us-180974862/
- https://www.nbpower.com/en/about-us/news-media-centre/news/2021/nb-power-chooses-new-brunswick-company-to-build-shediac-solar-farm/
- https://www.reformer.com/local-news/hinsdale-solar-project-would-be-largest-in-state/article_d948adce-30de-11ec-ad5c-e707b4d23e45.html
- https://en.wikipedia.org/wiki/Tinton_Falls_Solar_Farm
- https://www.energy-storage.news/new-mexicos-largest-solar-plus-storage-plant-in-utility-coal-retirement-plan-acquired-by-de-shaw/
- https://www.thewellnews.com/in-the-states/nys-largest-solar-farm-project-by-acreage-gains-approval/
- https://www.bizjournals.com/charlotte/news/2021/09/15/geenex-solar-proposes-484mw-project.html
- https://cleantechnica.com/2019/07/20/solar-power-comes-to-standing-rock-reservation/
- https://www.innergex.com/sites/amazon-solar-farm-ohio-hillcrest/
- https://www.nexteraenergyresources.com/skeleton-creek-project/project-overview.html
- https://www.bizjournals.com/portland/news/2020/02/11/pge-avangrid-team-up-on-oregons-largest-solar-farm.html
- https://www.opb.org/article/2022/04/05/industrial-solar-oregon-lake-county/
- https://en.wikipedia.org/wiki/Sarnia_Photovoltaic_Power_Plant
- https://www.psu.edu/news/impact/story/penn-state-lightsource-bp-break-ground-largest-solar-project-pennsylvania/
- https://www.cbc.ca/news/canada/prince-edward-island/pei-summerside-solar-taking-shape-1.6461017
- https://rrobserver.com/proposed-rio-rancho-solar-farm-could-power-over-100000-homes/
- https://www.valleybreeze.com/news/north_smithfield_and_blackstone/states-largest-solar-farm-will-go-online-next-month/article_d634c568-4197-11ec-83ce-7f98d69a0e2b.html
- https://montreal.ctvnews.ca/here-comes-the-sun-hydro-quebec-inaugurates-its-first-solar-power-plants-1.5479013
- https://leaderpost.com/news/saskatchewan/largest-solar-power-facility-opens-in-sask
- https://southerncurrentllc.com/south-carolina-solar-farms/
- https://www.environmentalleader.com/2020/02/largest-solar-project-in-south-dakota-to-begin-construction-will-generate-128-mw-of-energy/
- https://www.sltrib.com/news/environment/2021/12/10/solar-farm-set-generate/
- https://energycapitalpower.com/top-five-largest-solar-farms-in-texas-by-capacity/
- https://www.sltrib.com/news/environment/2021/12/10/solar-farm-set-generate/
- https://www.eagletimes.com/news/largest-solar-array-built-in-vermont-covers-150-acres/article_d3735b60-8c7c-11e8-83b5-57ecf5321ef2.html
- https://fredericksburg.com/news/local/massive-spotsylvania-solar-plant-is-online/article_9d7118ea-2de0-5895-b5ce-cefd4e380727.html
- http://choosewashingtonstate.com/largest-washington-solar-project-underway/
- https://electrek.co/2022/04/06/west-virginias-largest-solar-farm-will-sit-on-a-former-coal-mining-site/
- https://wisconsinexaminer.com/2022/04/08/green-light-for-states-largest-solar-project-in-dane-county/
- https://www.solvenergy.com/projects/sweetwater
- https://www.solvest.ca/energy-hub/news/north-klondike-ipp-producing-clean-energy-for-yukoners
- https://www.ntpc.com/energy-alternatives/current-alternative-energy-projects/fort-simpson-solar-energy-project
- https://electrek.co/2021/03/17/duke-energy-florida-announces-two-more-new-solar-farms/
- https://en.wikipedia.org/wiki/Solar_power_in_Florida
- https://news.duke-energy.com/releases/duke-energy-florida-announces-4-new-solar-sites
- https://www.orlandosentinel.com/news/environment/os-ne-small-city-solar-power-20200622-escfeosmxreelbby2rxauvdugq-story.html
- https://en.wikipedia.org/wiki/Solar_power_in_Idaho
- https://www.idahostatejournal.com/business_journal/agriculture/company-proposing-to-build-idahos-largest-solar-farm-near-american-falls/article_001e8211-19fd-5a87-b244-f9288872977c.html
- https://wamu.org/story/19/10/14/former-landfill-becomes-marylands-first-large-scale-community-solar-farm/
- https://iea.net/Projects/Great-Bay-Solar
- http://www.openroadrenewables.com/projects.html
- https://www.power-technology.com/news/cpv-plans-backbone-build-solar-farm-maryland-us/
- https://novascotia.ca/news/release/?id=20210708003
- https://www.pv-magazine.com/2016/09/15/largest-solar-plant-in-the-caribbean-connected-to-the-puerto-rican-grid_100026122/
- https://www.power-technology.com/marketdata/st-croix-solar-pv-park-u-s-virgin-islands/
- https://www.postguam.com/business/local/beijing-based-company-provides-solar-panels-to-88mw-guam-project/article_284071be-595d-11eb-830d-6fee4d7bd48b.html
- https://www.pncguam.com/the-first-ever-solar-farm-opens-on-guam/
- https://www.pncguam.com/solar-farm-closure-may-lead-to-power-rate-increase-in-the-long-term/
- https://www.nga.org/uncategorized/american-samoa-resilient-and-renewable-energy/
- https://www.energylivenews.com/2017/08/27/us-air-base-goes-solar-with-26-6m-project/
- https://www.kcrg.com/2021/06/09/people-palo-worry-proposed-3500-acre-solar-farm-linn-county-will-keep-community-growing/
- https://corridorbusiness.com/nextera-files-applications-with-linn-county-for-duane-arnold-solar-projects/
- https://www.thehawkeye.com/story/news/2021/04/10/wapello-solar-opening-marks-completion-iowas-largest-facility/7155862002/