Adam Jasinski (born April 30, 1978) is the winner of the U.S. series Big Brother 9. Jasinski is a public relations manager.

Jasinski was arrested on October 19, 2009, and was charged by the Drug Enforcement Administration (DEA), in North Reading, MA for possession of 2,000 oxycodone pills with intent to distribute. Jasinski admitted to funding his illegal venture with the $500,000 winnings from the show, and to buying and reselling oxycodone pills for several months. Jasinski faced a maximum of 20 years in prison and a $1 million fine.

On October 4, 2010, Jasinski appeared in U.S. District Court in Boston, Massachusetts and pleaded guilty to charges of possession with intent to distribute Oxycodone and failure to file a tax return for the year he won the $500,000 prize on Big Brother. Jasinski was remanded to custody. In what has been described as an ironic twist, Jasinski's lawyer said she planned to recommend a sentence of house arrest.

Jasinski was sentenced in January 2011 to four years in federal prison for the drug charge and tax evasion. The sentence was light in comparison to the 20 years he was facing. It has recently come to light that Jasinski cooperated with authorities that led to several arrests of former associates. He spent hours with the DEA providing intel into his entire operation for a promise of a reduced sentence. Jasinski claims to be suffering from a drug addiction and bipolar disorder.

After getting clean, Jasinski became an addiction recovery consultant and professional interventionist in the fields of mental health and substance abuse.[10]

Jasinski released a book titled My Kid's On Drugs, Now What? which is a resource for parents on how to guide their child down the path of long-term sobriety after treatment.