The average corn yields for counties and areas in Iowa are included in this file. Averages from 1999 through 2008 are included in the tables and graphs. These tables are presented in the accompanying "pdf" file that you can access by clicking here or on the icon above.

This information is helpful for seeing trends in yields over the past 10 years. Counties are sorted alphabetically by district. The information presented in this file is from the Iowa Office of National Agricultural Statistics Service.

Source: http://www.nass.usda.gov/Statistics_by_State/Iowa/index.asp.