CONCORD, N.H. — The first woman to serve as both governor and U.S. senator is backing a campaign to put a female face on the $20 bill.

Sen. Jeanne Shaheen filed legislation this week that would create a citizens panel to recommend an appropriate choice to the treasury secretary. She is hoping to build on the work of Women on 20s, a national campaign pushing for new $20 bills by 2020, the 100th anniversary of the constitutional amendment guaranteeing women the right to vote.

“I think there are a lot of opportunities that we sometimes don’t think about to point out the significant contributions women have made in U.S. history,” Shaheen said. “And this is one of those opportunities.”

The current portrait of former President Andrew Jackson has stared out from the face of the $20 since 1928. But paper currency is redesigned every seven to 10 years to thwart counterfeiters, and the latest $20 notes entered circulation in 2003. Changes can be ordered by the treasury secretary or president without an act of Congress, and Shaheen’s bill wouldn’t compel either to do so. Still, she and campaign supporters hope it will boost public support for redesigning the currency and spur broader conversation about the achievements of American women.

Barbara Ortiz Howard founded Women on 20s last year to honor historic women by making them visible in everyday lives. With help from experts in women’s history, the group compiled a list of 15 candidates that was narrowed to four finalists after a month of online voting: former first lady Eleanor Roosevelt, escaped slave and leading abolitionist Harriet Tubman, civil rights icon Rosa Parks and former Cherokee Nation Chief Wilma Mankiller. More than 230,000 people voted in the first week after the finalists were announced April 6, said the group’s executive director, Susan Ades Stone.

Stone said voting will continue as long as interest remains high, though the group may approach the White House in the next few weeks.