The Port Huron Commercial Tribune reported in 1887 that Port Huron was the second largest port of entry in to the United States behind Ellis Island, serving as the American entry point to around 100,000 immigrants every year.
Within the city limits of Port Huron, are the beginnings (or ends) of two major American roads. Interstate 94 begins in Port Huron and ends in Billings, Montana and is the 8th longest road in the country. Interstate 69 runs continuously from Port Huron to Indianapolis, Indiana and has non-continuous extensions that reach as far south as Rosenberg, Texas.
The easternmost point on land in Michigan is just south of the Bluewater Bridge at coordinates 43°35′28″N 82°7′22″W.