Buffalo is a village located in Sangamon County, in the state of Illinois (IL), United States. Nestled in the East North Central division of the Midwest region, it covers an area of 0.4 square miles (1.0 km²) and sits at an elevation of 611 ft. With a population of approximately 491 residents, Buffalo offers a peaceful, rural atmosphere.
The town's population is composed of about 49.08% males and 50.92% females, and it has a population density of 327.03 people per square mile (512.37/km²). Buffalo lies at a latitude of 39.85 and a longitude of -89.41, operating in the UTC-6.
Locals reflect a blend of American ancestry, with roots primarily in United States (4.7%), followed by English (13.2%), German (16.1%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 62515.