WASHINGTON—A federal grand jury indicted Rep. Duncan Hunter (R., Calif.) and his wife on Tuesday on charges that they had used campaign funds to pay for personal expenses and filed false campaign records, according to the Justice Department.

Between 2009 and 2016, Mr. Hunter and his wife, Margaret, allegedly used more than $250,000 in campaign funds to pay for expenses they wouldn’t otherwise be able to afford, including family vacations, school tuition, dental work and theater tickets, the Justice Department said in a statement....