Sandoval Township is located in Marion County, Illinois. As of the 2010 census, its population was 2,322 and it contained 1,005 housing units.
Sandoval Township (Wý T2N R1E) is centered at 38ð36'N 89ð7'W (38.362, -89.068). It is transversed northâÂÂsouth by U.S. Route 51 and eastâÂÂwest by U.S. Route 50. The city of Sandoval is located in the center of the township and Junction City is located in the southern part. According to the 2010 census, the township has a total area of , of which (or 99.66%) is land and (or 0.34%) is water.
In 1896, Sandoval Township was created from the western half of Odin Township.