More than 50 other women also have accused him of sexual abuse going back decades, with most too old to prosecute.
"The victims can not be un-raped".
Prison officials will process Cosby at the nearby state prison in Schwenksville before determining in which of Pennsylvania's 22 male prisons he will serve his sentence, prison spokeswoman Amy Worden wrote in an email.
Cosby, who was once known as "America's Dad", declined to make a statement when given a chance by the judge.
The Pennsylvania Sexual Offenders Assessment Board, which reviewed Cosby's case, recommended that he be labeled a sexually violent predator. "Now all I am asking for is justice as the court sees fit", said Constand, who submitted a much longer victim-impact statement that wasn't read in court. "Unfortunately, all we can do is hold the perpetrator accountable", said Gianna Constand, the victim's mother, who testified Monday that her daughter's buoyant personality was forever changed after the attack. "So lenient that I nearly wouldn't be surprised if Cosby's people only file an appeal of the guilty verdict".
For years, a nondisclosure agreement kept Constand and her family silent; the Cosby criminal trial provided her with an opportunity to finally reveal what took place almost 15 years ago.
"The classification means that Cosby must undergo lifetime counseling and report quarterly to authorities".
During the two-day hearing, prosecutors had said Cosby has no remorse and is capable of reoffending, while the defense argued that he's old, frail and legally blind, and should be sent home on house arrest.
Camille Cosby, Bill Cosby's wife, said in a statement that she had retained a former prosecutor to facilitate her efforts to "uncover the truth" regarding what she says is a feud between O'Neill and Castor.
It was the second time Cosby had stood trial for the allegations, after an earlier jury failed to reach a verdict in June 2017.
They had pushed for house arrest rather than prison time and vowed to appeal the conviction.
The Cosby case "really raised awareness of the pervasiveness of. sexual misconduct against subordinates and against women of relatively less power", said Daniel Filler, dean of Drexel University's law school.
Judge Andrew Napolitano said that disgraced comedian Bill Cosby's state prison sentence handed down on Tuesday was "rather lenient".
In his testimony, Cosby described sexual encounters with a string of actresses, models, and other young women and talked about obtaining quaaludes to give to those he wanted to sleep with.
Psychologist Timothy Foley, testifying for the defence, said that the risk of Cosby re-offending was "extraordinarily low".
Cosby became the first black actor to star in a prime-time TV show, I Spy, in 1965.