Pennsylvania is divided into 67 counties, each serving as an administrative region for local government. These counties vary in size, population, and geography, with some like Philadelphia County being densely populated urban areas, while others, such as Potter County, are more rural and less populated. Each county has its own government structure, typically including a board of commissioners and various departments that manage services like public safety, health, and transportation. Counties also play a crucial role in local elections, education, and infrastructure development, contributing to the overall governance of the state.