 Lincoln Charter Township is located in the west-central portion of Berrien County, with Lake Michigan to the west.The village of Shoreham and St. Joseph Charter Township are to the north, Royalton Township to the east, Baroda Township to the southeast and south, and Lake Charter Township to the south and southwest.According to the United States Census Bureau, the township has a total area of , of which is land and , or 1.67%, is water.