Where did the Poland China breed originate?

The Poland China breed originated in Ohio. This breed was developed in the 1800s, specifically in the Miami Valley region, through the selective breeding of local hogs and breeds imported from England. The breeders aimed to create a pig with desirable traits such as size, weight gain efficiency, and a gentle disposition, leading to the establishment of the Poland China as a distinct breed known for its excellent meat quality. Ohio's agricultural environment and the existing swine industry during that era played a crucial role in the breed's development.