Let me just get this out of the way and let you know that dairy worker is not the job that is more popular in Idaho than other states. Neither is Potato Farmer. 

According to data from the Bureau of Labor Statistics compiled by Business Insider, the most popular job in Idaho (that isn't popular everywhere else) is Forest and Conservation Technician. This doesn't mean that there are more employed in that profession in Idaho than anything else here. It means that compared to the rest of the United States we have more Forest workers than say Home Entertainment Installers like in Arizona or Zoologists in Washington. If you were looking for the most popular job overall, that honor goes to Retail Salesperson in 80% of states.

At least there are still some jobs that haven't been taken over by robots in Idaho.