Rader, 60, was given a sentence of a minimum of 175 years in prison by Sedgwick County (Kan.) District Judge Gregory Waller. He won't be eligible for parole for 40 years.
Rader couldn't receive the death penalty, which Kansas did not have at the time of the killings for which he was tried.
Rader confessed to killing 10 people from 1974 to 1991. During this week's sentencing hearing, victims' relatives listened as investigators graphically described the killings, including the slayings of a family of four. One member of that family was an 11-year-old girl who Rader hanged in such a way so that she slowly suffocated.
He called himself the BTK killer for "bind, torture and kill."
In a statement to the court Thursday, Rader said the killings were "self-centered. Very selfish." He ended with an apology to victims' family members.
An investigator told the court Wednesday that, during an interview, Rader said, "I'm sorry, I know this is a human being, but I'm a monster."
Notable deaths of 2014 [PHOTOS]