California
Iowa produces the most pigs
According to available statistics, Washington is the state which produces the most apples.
California and Florida
Houston
Nebraska
Hershey, Pennsylvania produces the most chocolate
Arizona produces the most copper in the United States.
The state which produces the most gold in Australia today is Western Australia.
The state that is known for it's lobsters is Maine, so I am guessing that it produces the most lobster. :)
California
Texas produces the most concrete in the United States.