The 56-year-old, who starred on the US sitcom Full House, will also pay a fine of $ 150,000 (£ 114,000) and perform 100 hours of community service.
Her husband, fashion designer Mossimo Giannulli, 57, was sentenced to a longer term – five months – and a fine of $ 250,000 (£ 191,000).
He was ordered to surrender on November 19 and will also perform 250 hours of community service.
Giannulli was more active in the program, prosecutors said.
He took “full responsibility” for his conduct and said he was “ready to accept the consequences”.
The couple are among nearly 30 prominent parents to plead guilty in the case, as bribes totaling $ 25million (£ 19million) have been paid to help the teens enter some of the top universities. elitists in the United States, notably Stanford and Yale.
Money has been paid to bring undeserving young people to college using fake test results or fake athletic titles.
Until March, when Loughlin and Giannulli admitted what they had done, they had spent over a year pretending their payments were legitimate donations.
In fact, they had funneled the money through a bogus charity run by Rick Singer, a college admissions consultant.
The idea was to get their daughters into USC as rowing recruits, even though neither of them rowed.
Prosecutors said the couple asked the girls to pose on rowers and told their younger daughter not to tell a high school counselor too much in case they got caught.
Singer, who admitted to facilitating cheating, was to testify against Loughlin and Giannulli if the case was tried.
During Giannulli’s sentencing, US Assistant Prosecutor Kristen Kearney said, “This type of behavior is not just overzealous parenting. He is criminal and deserves the punishment. “