Quick facts according to the IPPA:

1. At the end of 2012, Iowa had around 6,466 pork operations
2. A total of 40,290 Iowans are employed in the swine industry
3. 39% of hog farms in Iowa have 1,000 pigs or less
4. There are approximately 20 million pigs being raised in Iowa 
5. Nearly one third of the nations hogs are raised in Iowa 
6. Iowa is the number one pork producing state in the US
7. Hog farming alone represents $7.5 billion in total economic activity for Iowa
8. Iowa is the top state for pork exports
9. Total production value for Iowa hog farming exceeded $6.5 billion in 2013
10. Several billion dollars are generated in the state each year from pork processing activities