As of April 30, the Oklahoma State Election Board has determined the number of registered voters in each party: Democratic 942,388; Republican 850,560; Americans Elect 5; independent 234,141.
The Oklahoma voter registration form has a blank line in the “political party” section, so anyone can register into any party, by writing in a selection in the blank line. However, the state will only tally the number of registered voters for the qualified parties, plus they will tally the number in an unqualified party if it has been on the ballot in the previous four years. No party has been ballot-qualified in Oklahoma other than the Democrats and Republicans since November 2000, except that Americans Elect qualified in March 2012.