Kellogg is a city in Jasper County, Iowa, United States. The population was 599 at the 2010 census. It was originally named Manning's Station, then carried the names Jasper City, Kimball, and then finally Kellogg, named for the pioneer settler Judge Abel Avery Kellogg.
Kellogg was laid out in 1865 in anticipation of the Mississippi and Missouri Railroad being built through that territory. The railroad reached the town in 1866 and it was designated a station on the line. The terminus of the railroad remained in Kellogg for some time, fueling the early growth of the town.
Today, one of Kellogg's most notable features is the five-building Kellogg Museum complex. Its main building is the former Simpson Hotel, constructed in 1909. The museum complex also boasts an original one-room schoolhouse and a country church.
Kellogg is located at 41°43′00″N 92°54′27″W (41.716641, -92.907563).
According to the United States Census Bureau, the city has a total area of 0.37 square miles (0.96 km2), all land.
Highway 224 forms Kellogg's eastern boundary. The North Skunk River runs southeasterly along the town's southern edge.