As the area owned and settled by Johnson grew, he convinced the governor, William Tryon, to establish a new county in upstate New York west of Albany County. This new county was named Tryon, after the governor, and Johnstown was made the county seat. The county courthouse, built by William Johnson in Johnstown in 1772, partly at his own expense, still stands today, as the oldest operating courthouse in New York. Sir William Johnson died in 1774 before the American colonies declared their independence from Britain.