Brock Turner will be released from Santa Clara County Jail on Friday, having served three months of a six month sentence.
County jail inmates often serve 50 per cent of their sentences if they maintain a clean disciplinary record, according to the Associated Press.
The Sara Clara County Jail was contacted to verify but did not immediately respond.
The 21-year-old, who was on a swimming scholarship at Stanford University in California, was charged with two counts of rape, two for felony sexual assault and one for attempted rape after he was found in January by two international students from Sweden who reported he was sexually penetrating an intoxicated and unconscious 22-year-old.
Source: Supplied
The two men testified that Mr Turner fled when they approached him, but chased and successfully restrained him until police arrived to take him into custody.
Stanford law professor Michele Dauber has organised a rally for Friday outside of the jail in protest of the lesser sentence.
Debate around sexual offence and class privilege raged around the world when Santa Clara County Superior Court Judge Aaron Persky sentenced him on June 2 to six months in prison, in contrast to the recommendation from prosecutors of six years.
Mr Turner’s father contributed to the outrage when in his court statement he said Mr Turner, who lost his scholarship at the prestigious university, had already paid "a steep price … for 20 minutes of action".
"Brock's life has been deeply altered forever by the events of January 17 and 18. He will never be his happy-go-lucky self with that easygoing personality and welcoming smile."
A from the woman, who went by the pseudonym Emily Doe, was then published widely by media outlets.
"My life has been on hold for over a year, a year of anger, anguish and uncertainty, until a jury of my peers rendered a judgment that validated the injustices I had endured,” she wrote.
"Someone who cannot take full accountability for his actions does not deserve a mitigating sentence."
Ms Dauber launched a at the time, calling to remove Judge Persky from the bench following his decision.
"We the people would like to petition that Judge Aaron Persky be removed from his judicial position for the lenient sentence he allowed in the Brock Turner rape case," it said.
"Despite a unanimous guilty verdict, three felony convictions, the objections of 250 Stanford students, Jeff Rosen the district attorney for Santa Clara, as well as the deputy district attorney who likened Turner to 'a predator searching for prey'. Judge Persky allowed the lenient sentence suggested by the probation department."
Judge Aaron Persky has also been criticised for handing down a harsher penalty to 32-year-old Raul Ramirez, an immigrant from El Salvador, for a similar crime, earlier this year.
Mr Ramirez admitted to sexually assaulting a female roommate.
Mr Persky sentenced him to three years in state prison, according to records obtained by the Guardian.
Aaron Persky to stop hearing criminal cases
Santa Clara County Superior Court Judge Aaron Persky has requested to be assigned to the court's civil division, more than two months after imposing the controversial sentence on Brock Allen Turner, 20, for the January 2015 attack, Presiding Judge Risë Jones Pichon said in a statement.
"Judge Persky believes the change will aid the public and the court by reducing the distractions that threaten to interfere with his ability to effectively discharge the duties of his current criminal assignment," Pichon said.
He will begin his civil court assignment on September 6, Pichon said.
Persky has received death threats, faced a recall effort and several online petitions seeking his removal in a furor of criticism for what was perceived as a lenient sentence.
Prosecutors had asked for Turner to be jailed for six years.
The uproar over the sentence, fueled in part by the victim's harrowing letter in which she detailed the assault, is part of growing outrage over sexual assault on US college campuses.
In response to the sentence, lawmakers in California are moving a bill through the legislature that prohibits anyone convicted of sexual assault in the state from being sentenced just to probation.
"Sentencing a felon convicted of such a crime to probation re-victimises the victim, discourages other victims from coming forward and sends the message that sexual assault of incapacitated victims is no big deal," said California Assembly member Bill Dodd, who introduced the measure in June.
The announcement of Persky's move to civil cases comes two days after women's groups and social media users criticised as too lenient the two years' probation given to a Massachusetts student athlete who sexually assaulted two women as they slept.
David Becker, 18, a former three-sport athlete from East Longmeadow High School in western Massachusetts, escaped jail time even though prosecutors recommended a two-year sentence.
The judge in that case, Thomas Estes, in District Court in Palmer, Massachusetts, declined to comment.
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