Walloon Lake is an unincorporated community and census-designated place (CDP) in Charlevoix County in the U.S. state of Michigan.

As an unincorporated community, Walloon Lake has no legal autonomy of its own but does have its own post office with the 49796 ZIP Code.

The community received a post office under the name Tolcott on October 19, 1897 with Frank Jones serving as the first postmaster.

The community of Walloon Lake was listed as a newly-organized census-designated place for the 2010 census, meaning it now has officially defined boundaries and population statistics for the first time.

While in northern Michigan every summer, a young Hemingway would spend most of his time fishing, swimming, tending to the family farm, camping, and eventually finding an interest in writing.

As a teenager, he would travel independently and often spent his time in Walloon Lake, Horton Bay, and the surrounding area.

[7][8] Hemingway's The Nick Adams Stories and its main character were heavily influenced by his adventures and experiences in northern Michigan.