June is Dairy Month. This interactive map shows the total milk sales per county for all the counties that have multiple dairy farms. It is based on 2012 USDA Ag Census.
Data Source: USDA/NASS Quick Stats. https://quickstats.nass.usda.gov/
The Internet has recently discovered that the FIPS Code for New York, so that a milk plant that is regulated by NY Department of Ag and Markets would start with 36, while Pennsylvania Department of Agriculture would be 42, and Vermont Department of Agriculture would be 50. That said, this site gives a pretty face to the USDA's milk processing plant database, and tells you city the processing plant is located in along with products that the plant is licensed to produce.
"The popularity of fondue wasn't an accident. It was planned by a shadowy association of Swiss cheese makers. A cheese cartel basically ruled the Swiss economy for 80 years, until fairly recently."