Miami County Judge Robert Lindeman followed the terms of an earlier plea agreement for the 40-year-old man. He pleaded guilty to six rape counts and agreed to cooperate with authorities.
The man had been charged with 31 counts of felony rape in Miami County, where he had been caring for the three boys and a girl in his home. Authorities have said the man had adopted all of the children except for one of the boys, whom he was in the process of adopting.
The Associated Press isn't naming the man to protect the identities of the children, who were ages 9-12.
County prosecutors had agreed to drop 25 counts and recommend the sentence of 60 years to life in prison in return for the guilty pleas last month.
"Weighing the recidivism and seriousness factors, the court would agree with the recommended sentence and order those sentences to run consecutively," the judge said.
The man could have faced life in prison without the possibility for parole.
Dressed in an orange jail jump suit with his wrists and ankles shackled, the adoptive father was very quiet and showed little reaction Monday. He declined to make a statement in court.
His attorney, Nick Gounaris, says he was pleased the judge accepted the plea deal.
"The main reason was to insure that the children in this case wouldn't have to come in to court and testify, Gounaris said. "As it relates to this case, we've accomplished that goal."
The man told The Associated Press in a recent interview that he was sorry for hurting the children and hoped to spare them from having to testify.
Prosecutor Gary Nasal wouldn't comment, citing still pending cases, including the upcoming trial of Jason Zwick, who is charged with raping one of the boys.
Zwick, 30, of Beaver Creek, is scheduled for trial Jan. 8.
"It's clear that one of his responsibilities is that (he's) going to testify in the Zwick trial for the state," Gounaris said of his client.
Lindeman said Monday that the adoptive father will get credit for nearly 10 months already served. If he is released, he would have to register as a sex offender and keep law enforcement informed of his whereabouts.
The adoptive father still faces seven related charges including rape of a child under 13 and complicity to rape in nearby Montgomery County. A hearing is scheduled Thursday in Dayton in Montgomery County on a possible plea in that case.
Patrick Rieder, 32, of Dayton, also was arrested earlier this year in Montgomery County on rape charges related to what authorities say was the prostitution of a boy under the age of 13 in meetings arranged by the adoptive father. He is awaiting trial in Dayton.