Polls closed Tuesday at 9 p.m. for the Democratic primary in the 1st Congressional District, but voters still have to wait to find out who will face freshman U.S. Rep. Lee Zeldin (R-Shirley) come November.

Setauket native David Calone trailed former Southampton Town Supervisor Anna Throne-Holst by 29 votes by the end of Tuesday, unofficial Suffolk County Board of Elections results showed, but neither candidate felt comfortable enough to speak definitively about the race.

Unofficial results showed Throne-Holst with 5,446 votes — 50.09 percent of the vote — and Calone with 5,417 votes — 49.82 percent.

Calone, a former prosecutor, venture capitalist, and North Shore native, said his campaign would be waiting for the nearly 1,700 absentee ballots to be counted in the coming week before making any further statements on his status in the primary race.

“We did not have Wall Street fundraisers, and we did not have $720,000 of super PAC funding poured in for us in the last three weeks — but here we are in a virtual tie,” Calone said Wednesday. “I cannot begin to thank all the volunteers and supporters who have put their hearts and souls into this campaign over the past year. Together, we knocked on thousands of doors, held nearly fifty house parties, and made tens of thousands of phone calls to voters in every corner of this district.”

By the end of the primary campaign, Calone received several endorsements from various elected officials and community groups, including state Assemblyman Steve Englebright (D-Setauket), Suffolk County Legislator Sarah Anker (D-Mount Sinai) and Brookhaven Town Councilwoman Valerie Cartright (D-Port Jefferson Station).

Calone has experience working as director of six privately held companies throughout the country and has helped organize the bipartisan Congressional Caucus on Innovation and Entrepreneurship in the U.S. House of Representatives, advocating federal policies that promote job creation through the development of startups and other small businesses. In that role, he helped launch Startup Day Across America, an event to connect federal officials with early-stage companies in their regions. He also founded the Long Island Emerging Technologies Fund, which provides funding to six early-stage companies based on technology developed at Long Island’s research institutions.

Throne-Holst, who received support from Zeldin’s predecessor, former U.S. Rep. Tim Bishop, U.S. Sen. Kirsten Gillibrand (D-NY) and longtime incumbent U.S. Rep. Steve Israel (D-Huntington) — who Throne-Holst said was pivotal in convincing her to run — spoke with gravitas about her standing after all voting district tallies were in Tuesday night, excluding absentee votes.

“We are waiting for all votes to be counted,” she said in a statement, “but are proud to have a lead at the end of election night. We are confident going forward that victory will be ours now … and in November.”

Throne-Holst co-founded the Hayground School — an elementary school dedicated to supporting children with different learning needs. After serving as a councilwoman, she was the first Democrat to be elected supervisor in Southampton since 1993, overcoming a red-leaning electorate on the East End.

Zeldin unseated the six-term Democrat Bishop by a wide margin back in 2014, with a final vote total of his 54 percent to 45 percent.

“While the two Democrats continue to slug it out against each other beyond a primary with historically low voter turnout, I remain focused on my work to pursue my ‘New Era of American Strength’ agenda to protect America’s security at home and abroad, help grow our economy, support our veterans and first responders, improve health care and the quality of education, repair our nation’s infrastructure and safeguard our environment,” Zeldin said in a statement.

Out in the more western 3rd Congressional District, former Nassau County Executive Tom Suozzi (D-Glen Cove) bested four other candidates vying for the nomination to run for Israel’s seat after the longtime incumbent said he would not seek re-election earlier this year.