Sandoval /sænˈdoʊvəl/ is a town in Marion County, Illinois, United States.

[3] In the early days, this area was the crossroads of well traveled Indian trails.

With 700 strong, orders were given to proceed to Illinois Town (East St. Louis), then across the river to Jefferson Barracks.

Joined with other troops they went on to Savannah, Tennessee and a permanent camp at Pittsburg Landing.

Sandoval was the population center of the United States for a considerable portion of the 20th century.

The town was originally platted as a replacement for Washington, D.C., with space reserved for the White House and other branches of government.

U.S. Route 50 passes through the village center as Missouri Avenue, leading east 9 miles (14 km) to Salem, the county seat, and west 14 miles (23 km) to Carlyle.

According to the U.S. Census Bureau, Sandoval has a total area of 1.0 square mile (2.6 km2), all land.