Court documents show a judge granted her request on Oct. 7, 2016. Her new name has origins in Africa.
The former Dolezal has acknowledged that she is "Caucasian biologically" but says she identifies as black.
Her race became a national topic of conversation in 2015 after a local news reporter questioned her on camera about her background.
She told Britain's The Guardian newspaper last week that that she can't find a job and the only work she has been offered is in reality TV and porn.
Her memoir is set to be released later this month.