Cainsville is a city located in Harrison County, in the state of Missouri (MO), United States. Nestled in the West North Central division of the Midwest region, it covers an area of 1.4 square miles (4.0 km²) and sits at an elevation of 860 ft. With a population of approximately 370 residents, Cainsville offers a peaceful, rural atmosphere.
The town's population is composed of about 47.57% males and 52.43% females, and it has a population density of 270.07 people per square mile (104.28/km²). Cainsville lies at a latitude of 40.44 and a longitude of -93.77, operating in the UTC-6.
Locals reflect a blend of American ancestry, with roots primarily in United States (25.4%), followed by English (8.9%), German (8.6%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 64632.