Lacon is a city located in Marshall 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 1.6 square miles (4.0 km²) and sits at an elevation of 495 ft. With a population of approximately 1,979 residents, Lacon offers a peaceful, rural atmosphere.
The town's population is composed of about 47.04% males and 52.96% females, and it has a population density of 236.88 people per square mile (477.56/km²). Lacon lies at a latitude of 41.02 and a longitude of -89.41, operating in the UTC-6.
Locals reflect a blend of American ancestry, with roots primarily in United States (6.3%), followed by English (12%), German (28.9%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 61540.