The Iowa Democratic caucus has been wreaked by such havoc that Brooklyn Borough President and presumptive mayoral candidate Eric Adams is calling on City Hall to take steps to ensure New Yorkers never suffer the same embarrassment.

“The Iowa debacle should be a wake-up call for how we integrate new technologies into our election system,” said Adams, while joined by supporters outside the Board of Elections offices in lower Manhattan to demand the agency continue conducting elections with voter-marked paper ballots instead of machines with “untested technology” its considering.

Adams, Councilwoman Alicka Ampry-Samuel (D-Brooklyn) and Susan Lerner, executive director of Common Cause New York, also called on Mayor Bill de Blasio and the City Council to set aside $10 million in next fiscal year’s budget towards educational outreach efforts aimed at preparing voters for a complex, ranked choice voting system that goes into effect in 2021.

“We saw what happened in Iowa two days ago,” Adams said. “We don’t want a repeat of that here in our city … and we know we can get it right if we put the right money on the ground.

“It is imperative that every New Yorker understand this major shift that we are about to put in place in our city.”

Voters overwhelmingly approved the new voting system during a referendum last November. It will allow voters to rank candidates in order of preference on their ballots for city races.

If voters still want to choose just one candidate, they can. A candidate who receives a majority of first choice votes will win.

But if there is no majority winner, the last-place candidate would be eliminated, and any voter who had that candidate as his or her top choice would have that vote transferred to their next choice.

The ranking process continues until a winner is determined. Rank voting would avoid the costs of a second run-off election.

Adams said money saved by avoiding extra run-offs could be used to pay for the educational outreach program, which would include door-knocking voters. He said the 2013 Democratic primary run-off election for public advocate cost taxpayers over $11 million.

Council Speaker Corey Johnson, another presumptive mayoral candidate, said during an unrelated Albany event that he also supports continuing using “paper ballots” when ranked choice voting starts in light of the problems experienced in Iowa.

His office did not immediately respond to questions about funding Adams’ educational outreach proposal.

De Blasio spokesman Jose Bayona said “ranked choice voting is a critical piece of [the mayor’s] DemocracyNYC agenda,” adding “the administration will continue to partner with all stakeholders to ensure that the city is prepared.”

The Board of Elections did not immediately return messages.