As of July 26, here are the number of registered voters in Kansas: Republican 786,719; Democratic 428,381; Libertarian 15,473; independent 529,702. These figures are from the Secretary of State’s office, but they are not on his web page. There are no voters registered in any other parties. The Kansas voter registration form does not have a blank line letting people register into an unqualified party. Note the party affiliation area of this Kansas voter registration form.
The percentages are: Republican 44.69%; Democratic 24.34%; Libertarian .88%; independent 30.09%.
In November 2016, the percentages were: Republican 46.03%; Democratic 24.65%; Libertarian .83%; independent 28.49%.