How many historic barns are in the United States?

Updated

Answer:

2002
Hartke Farm-Litchfield, IL

In the recent U.S. Department of Agriculture Census of Agriculture, 664,264 farmers and ranchers answered "yes" to the question: do you "have a barn built prior to 1960?"  This number does not include multiple barns on the same property, barns not located on farms, or barns located on farms or ranches producing less than $1,000 in agricultural commodities.  Additional information about the recent Census of Agriculture can be found here.  A summary of the results by state is also available.