The city had demanded the Cradle of Liberty Council chapter repudiate the national organization's ban on gay membership or face eviction from their city-owned headquarters, The Philadelphia Daily News reported Thursday.
The city contended at trial that Cradle had to abide by the city's anti-discrimination laws if it wanted to retain the $1-a-year lease as a non-profit organization, the newspaper said.
But the jury ruled that was a violation of the chapter's First Amendment rights.
The U.S. Supreme Court ruled in 2000 that the Boy Scouts were a private membership group and had a constitutional right to associate with whoever they wanted without government interference.
Cradle filed its civil-rights lawsuit in May 2008.
Attorneys for the chapter applauded the jury's decision.
"We expect to get an injunction from the court," attorney Jason P. Gosselin said. "We've asked for a permanent injunction from trying to evict the Scouts because of the city's opposition to the leadership policy."