There are 18 US Post Offices in Allegan County serving a total of 142,372 residents equating to 7,910 residents per post office. It's estimated that approximately 227,242 packages are handled across the 18 county post offices annually. Allegan County is a county in the U.S. state of Michigan. As of 2010 census, the population was 111,408. The county seat is Allegan. The name was coined by Henry Rowe Schoolcraft to sound like a Native American word. Allegan County comprises the Holland, MI Micropolitan Statistical Area, which is included in the Grand Rapids-Wyoming-Muskegon, MI Combined Statistical Area. It is primarily an agricultural area that is rapidly becoming urbanized as the population centers of Grand Rapids on the northeast and Kalamazoo to the southeast expand into Allegan County. The county has long been a regional tourist draw, particularly the Tulip Time Festival in Holland and the area along Lake Michigan. The Lake Michigan shoreline has long been a popular place for vacation homes, and that such development continues, especially around Saugatuck and Douglas. Another draw is Allegan State Game Area, a 45,000 acres (180 km2) forest attracting campers, snowmobilers, cross-country skiers and hunters. Allegan County also hosts Saugatuck Dunes State Park with trails through scenic dunes and a swimming beach on Lake Michigan. Lake Allegan is another popular destination."