Documents received from Oklahoma election officials show that from August 25th through today, September 22nd, there have been 39,367 new voters registered in Oklahoma. This number does, however, include people that had to register again because of address or name change.
Cleveland county records show that there are about 10,000 more voters registered at the end of August in 2020 than there were at the end of August 2016. The deadline to register to vote in Oklahoma is October 9th.
To register, go to elections.gov, and print out the application, then mail it to your local election board.