Those subpoenaed to provide depositions and documents include current and former reporters and editors at The Associated Press, The Washington Post, the Daily Beast and Fox News.
Jill and Scott Kelley of Tampa, Florida, sued the federal government in 2013, alleging that officials violated the US Privacy Act by disclosing information about the couple. Jill Kelley was implicated in 2012 scandals involving Petraeus and Marine Gen. John R. Allen.
The Kelleys sought to question former Defense Department general counsel Jeh Johnson about his conversations with the media. Johnson is now the secretary of the Homeland Security Department.
Those subpoenaed include AP reporter Anne Flaherty and former AP reporters Adam Goldman and Kim Dozier. Goldman now works at the Post and Dozier at the Daily Beast.
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The AP was the first to report the name of Kelley, a socialite who hosted parties attended by high-ranking military brass.
"We will resist the subpoena based on the information we have," Paul Colford, AP's vice president and director of media relations, said Tuesday.
Pentagon officials acknowledged in earlier depositions that they developed a "press plan" with members of an unspecified delegation from the White House in November 2012 to tell reporters that emails between Allen and Jill Kelley were "potentially inappropriate" and to suggest that the two had a sexual relationship.
Current and former government officials already questioned under oath include former Defense Secretary Leon Panetta, former Pentagon chief of staff Jeremy Bash and former Pentagon and CIA spokesman George Little.
The Kelleys' lawyer, Alan Charles Raul of Washington, did not provide comment Tuesday evening.
In 2012, Jill Kelley contacted a social acquaintance at the FBI to complain that an unknown person had sent her harassing emails. Her complaint triggered a criminal investigation that led agents to Paula Broadwell, Petraeus' biographer. Broadwell had been having an affair with the former Army general, who was then director of the spy agency.
Petraeus resigned November 9, 2012, and later pleaded guilty to one misdemeanor charge of mishandling classified information.
Jill Kelley's name and some harassing emails were disclosed on November 11, 2012, to reporters amid the sensational disclosures about Petraeus. Two days later, she was linked to Allen, then-commander of US forces in Afghanistan.