Callao is a city located in Macon 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 0.5 square miles (1.0 km²) and sits at an elevation of 819 ft. With a population of approximately 291 residents, Callao offers a peaceful, rural atmosphere.
The town's population is composed of about 49.83% males and 50.17% females, and it has a population density of 582.00 people per square mile (224.71/km²). Callao lies at a latitude of 39.76 and a longitude of -92.62, operating in the UTC-6.
Locals reflect a blend of American ancestry, with roots primarily in United States (8.6%), followed by English (10.7%), German (21.6%), and Scotch-Irish (4.1%) heritage. The town is identified by the ZIP code 63534.