Wind-powered Electric Generation in Iowa

Iowa's Annual Wind Generation

This information relates specifically to electricity generated from wind resources. For more information on electric generation in Iowa from all sources, please see the Iowa's Electric Profile page.

Year Wind Nameplate
Capacity MW
Wind Electric
Generation MWh

Percent of Iowa's Total Electric
Energy Generation from Wind(3)

2019 9,906.3 25,328,971 41.07%
2018 8,386.7 21,334,053 33.66%
2017 7.098.7 21,372,752 36.91%
2016 6,935.3 20,076,023 36.91%
2015 6,314.0 17,872,632 31.54%
2014 5,667.2 16,306,756 28.68%
2013 5,154.1 15,568,406 27.47%
2012 5,103.9 14,032,489 24.76%
2011 4,302.0 10,709,177 19.00%
2010 3,665.4 9,170,337 15.95%
2009 3,448.0 7,420,520 14.31%
2008 2,660.9 4,083,787 7.69%
2007 1,169.9 2,756,676 5.54%
2006 921.2 2,317,821 5.10%

(1) IUB staff updates the values for past years based on the U.S. Energy Information Administration (EIA) data as it is reviewed. 

Source Notes:
(1) Wind Nameplate Capacity (MW) for 2006-2019 based on generator information in Form EIA-860 based on generating units greater than 1 MW, physically located in Iowa, where wind is identified as the prime mover for the applicable year.
(2) Wind Energy Generated (MWh) for 2006-2019 was taken from Form EIA-923. This energy was generated from units greater than 1 MW within the state of Iowa, but some portion of the energy may have been consumed out of state. The data applicable to the years 2006-2019 comes from the final EIA-923 data for each applicable year. Final data for 2019 consists of 2,102 plants from the monthly survey and 7,751 plants from the annual survey.
(3) This column is calculated by comparing wind-based generation to generation from all fuel sources based on EIA-923.

According to the American Wind Energy Association (AWEA), in 2019 Iowa generated 41.9  percent of its electricity using wind power, ranking first in the nation for wind energy as a share of total electricity generation.

Source:  AWEA




2019 Wind Generation (MWh) as a Percent of Total Generation by State

Source:  2019 generation by fuel source per EIA 923.  Some portion of both the wind and non-wind energy generated within a state may have been consumed out of state. Download combined data table (Excel).

2019 Wind Nameplate Capacity (MW) as a Percent of Total Nameplate Capacity by State

Source:  Wind Nameplate Capacity for 2019 based on generator information in Form EIA 860 Annual Electric Report. Download combined data table (Excel).

Frequently Asked Questions

What are the IUB's requirements for siting a wind farm in Iowa?​

  • A facility as defined in the IUB's rules in 199 IAC chapter 24 must apply for a generating certificate prior to construction of significant alteration. County and local governments and state and federal agencies may have additional requirements. 

What tax credits are available for developing renewable energy in Iowa?

  • Under Iowa Code Chapter 476C, a state production tax credit of 1.5¢ per kWh is available for energy sold by eligible wind energy facilities and certain other non-wind renewable energy facilities. For applications filed after July 1, 2011, tax credits are also available for on-site consumption of renewable energy from facilities with a nameplate capacity of not less than 750 kW. For wind energy facilities, the maximum total eligibility is 363 MW. For other non-wind renewable facilities, the maximum total eligibility is 63 MW. The eligible facility was required to have been placed in service before January 1, 2018.
  • The tax credit certificates are transferable and may be applied toward the state's individual income, corporate income, franchise, insurance premium, sales and use, or replacement tax.
  • For more information see the IUB’s Renewable Energy Tax Credits page.
  • Additional tax credits or exemptions may be available through programs not administered by the IUB. More information is available at

What is Net Metering and how does it apply to wind generation?

  • On May 4, 2017, the IUB approved net metering pilot tariffs for Interstate Power & Light Company (IPL) and MidAmerican Energy Company (MidAmerican). For more information see the IUB's On-Site (Distributed) Generation webpage. 

Does Iowa have a renewable portfolio standard?

  • Iowa’s alternate energy law was one of the country’s first renewable energy policies and, in many ways, was a precursor to today’s renewable portfolio standards. Iowa has a capacity-based requirement of 105 MW and associated energy, which rate-regulated utilities are obligated to purchase. In 2007, the IUB issued an order in Docket No. AEP-07-01, which approved specific facilities designated by the rate-regulated utilities for satisfying this requirement.

Additional Information from Off-Site Sources

Printed from the website on October 24, 2021 at 9:31am.