Lake Latonka, PA

Lake Latonka is a Mercer County CDP spread across Coolspring and Jackson townships, wrapped around its namesake reservoir. The place began as a planned lake community in 1965, when its founders laid out 1,600 lots and a set of rules for single-family homes, roads, and lake use. That origin still tells you how to read the map: this is a reservoir-centered settlement, not a traditional borough with a courthouse square. Most of the local story is in the water, the shoreline, and the two-township boundary around it.