Boyer Valley Township is a township in Sac County, Iowa, United States. Early is contained within Boyer Valley Township.
The township's elevation is listed as 1316 feet above mean sea level.
It has a total area of 0.39 square miles.
As of the 2010 census, Boyer Valley Township had a population of 775 and 380 housing units.
Boyer Valley Township was founded in 1871. It was named for the Boyer River. Its first resident was likely William Cory, a homesteader, who settled in the area in 1868. The Chicago and North Western Railway used to run through the township. It was once a prosperous farming town, with a greater population than at present.
Boyer Valley Township is part of the GalvaâÂÂHolstein Community School District.