Fillmore County was created on March 5, 1853. It is named for Millard Fillmore, the 13th president of the United States. Fillmore County was an early destination for Euro-American settlement following the United States' 1851 treaties with the Dakota nations. Norwegian immigrants were particularly numerous. In 1860 Fillmore was Minnesota's most populous county.
Preble Township was organized in 1858, and named for Edward Preble, a U.S. Navy officer.
