Williams County, North Dakota: History
There have been two Williams counties in the history of North Dakota. The first, created in 1873, was located south of the Missouri River near where Dunn and Mercer counties are today. This county continued to exist through North Dakota statehood, and while the second Williams County was created in 1891. The first Williams County was extinguished by a county referendum on November 8, 1892; part of its territory was absorbed by Mercer County and the rest reverted to an unorganized territory.
The second Williams County was created by the North Dakota legislature on March 2, 1891, from the previous counties of Buford and Flannery, which were dissolved. The government of this county was organized on December 8, 1891. This county's boundaries were altered in 1910, when a portion of its territory was annexed to create Divide County. Its boundaries have remained unchanged since then. The county is named for Erastus Appleman Williams, a European-American settler who served in the Dakota Territory legislature and the North Dakota legislature.
In June 2014, lightning struck a Williams County Oasis Petroleum saltwater disposal facility. It sparked a fire that destroyed the facility, burning 630 gallons of oil and tens of thousands of gallons of brine.