PHOTOS: Inside look at jail cell where Brock Turner served 3-month sentence
Turner, 21, was released from Santa Clara County Jail on Friday.
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The sentence sparked a national outcry. Turner is now living in Ohio with his parents.
Turner registered at the Greene County sheriff's office on Tuesday, four days after leaving a California jail after serving half his term. California jail inmates with good behavior typically serve half their sentences.
Turner registered under his family's address in Sugarcreek Township, where about a dozen people had protested Friday as police watched.
He must register as a sex offender for life. He faces three years of supervised probation.
He was convicted of assaulting the young woman near a trash bin after they drank heavily at a fraternity party in January 2015. Turner plans to appeal.
The Associated Press contributed to this report.