Pete Buttigieg has surged into third place in Iowa behind former Vice President Joe Biden and Sen. Elizabeth Warren, a new poll released on Monday shows.

Buttigieg, the mayor of South Bend, Ind., got 13 percent of support from likely Democratic caucus-goers in the Hawkeye State, trailing only Biden at 18 percent and Warren at 17 percent, a Suffolk University/USA Today Poll found.

The presidential hopeful made up a lot of ground since June, when the same poll showed him at just 6 percent.

While Buttigieg is rising in the poll, Sen. Kamala Harris is falling.

She fell 13 percentage points after coming in second behind Biden in the June survey and is now tied for sixth place with Rep. Tulsi Gabbard and Sen. Amy Klobuchar.

Sen. Bernie Sanders came in fourth place with 9 percent — the same level of support he got in June.

The remainder polled at 3 percent or less.

“Iowa is unquestionably up for grabs,” said David Paleologos, director of the Suffolk Political Research Center. Buttigieg “has found a lane and is accelerating toward the front of the pack, surpassing Bernie Sanders.”

The poll was conducted between Oct. 16 and Oct. 18 and surveyed 500 likely Democratic caucus-goers.

It has a plus/minus 4.4 percentage-point margin of error.

The Iowa caucuses will be held on Feb. 3.