He married Lisa Storie in 2011. They have one son. Lisa Storie-Avenatti filed for divorce in December 2017. On November 30, 2018, the couple signed a temporary agreement which required Avenatti to sign over certain possessions and pay $40,000 a month in family support, with the first payment being due by December 3, 2018. In December 2018, it was reported that Avenatti had agreed to pay Lisa $1,947,540 in child and spousal support, and to transfer ownership of several assets to her, including five luxury wristwatches, a Frank Gehry sculpture, other artwork, and a leased 2017 Ferrari 488 GT Spider, while his law firm would transfer to Lisa its interest in a 2015 Honda private jet. He responded to the reports, calling them "bogus". The jet was later confiscated by federal agents at the Santa Barbara airport on April 10, 2019, during an asset seizure based on the tax, wire, and bankruptcy fraud indictment filed in the U.S. Central District Court of California.
