You call this a mayoral election?

The 1993 Rudy GiulianiDavid Dinkins rematch set the high-water mark for voter turnout in a New York City mayoral election: 57% of registered voters cast 1.9 million votes. It’s been downhill since then.

In 2009, only 28% of registered voters, or 1.1 million, voted for mayor. The low point came in 2013, when a pathetic 24% of 4.3 million registered voters, or 1.088 million, bothered to vote.

Pollsters projected that Bill de Blasio would blow out Joe Lhota. So voters stayed home. De Blasio got 73% of the vote.

Some pollsters are projecting an even lower turnout this year, as de Blasio seeks reelection.

What will it take to get New Yorkers back to the polls, especially at a time when pretty much no Democrat worth his or her salt has the gall to challenge an incumbent of his own party?

Candidates with vision and personality to inspire them to register and vote. Ideas, not ideology. A two-party system, not a city run by one party. Real choice, not the illusion of choice.

Being mayor of New York is the second-toughest job in America, and the pay’s not great. So it’s time for the next Michael Bloomberg to step up, take a pay cut and throw a hat in the ring.

Were Apple looking for a new CEO, the company would conduct a worldwide search for the most qualified executive to fill the job. Why don’t the best leaders from the public and private sectors apply to control the city’s $85 billion budget?

Why don’t the citizens/shareholders demand the best leaders to run their city? Because unions, money, lobbyists, special interests and the media — not resumes — determine who’ll be mayor.

If resumes mattered, Lhota, a former deputy mayor for operations and MTA executive director, not de Blasio, a career political operative and politician, would be mayor today.

The Republican Party has been in a deep freeze since Bloomberg left office. Ken Sherrill, professor emeritus of political science at Hunter College, calls out Giuliani and Bloomberg for “doing absolutely nothing” to build the Republican Party in New York City.

Paul Massey, running on the GOP line, is this year’s electoral system outsider. A Bloomberglite, millionaire carpetbagger from Larchmont, Massey built a successful real estate company here over the past 20 years.

But, after two decades, he still has little or no grasp of the city’s issues. Trust me. During recent Republican mayoral forums in Brooklyn and at Columbia University, I heard Massey fumble answers about stop-and-frisk and sanctuary cities.

Massey has spent more than he’s raised, loaning his campaign $1.5 million and pledging it millions more. So much for budgetbalancing skills.

Michel Faulkner — a client of mine — is a political unicorn: A conservative black Republican, Harlem pastor and former homeless advocate, congressional candidate and New York Jet linebacker. Faulkner’s a fighter, but his fiscally and socially conservative politics are out of step in a liberal city where registered Democrats outnumber Republicans by six to one.

Joining Massey and Faulkner in the Republican primary is Darren Dione Aquino, a disability activist. Aquino has played a disabled cop and a mobster on TV. Not exactly mayoral bonafides.

Then there’s former NYPD detective, tough guy actor and Fox News talking head Bo Dietl, a dems-and-dose New Yorker. He planned to challenge de Blasio in a Democratic primary, but Dietl mistakenly checked the boxes on his voter forms for both the Democratic and Independence parties.

And one honest listen to Dietl — who called the Statue of Liberty a “hooker” and said of trans bathroom rights, “If it ain’t cut off, you don’t go in” — proves that he isn’t mayoral material.

So what have we got? Not an election worthy of choosing the 110th mayor of the City of New York. A recent Quinnipiac University poll had de Blasio ahead of Massey by a 59% to 25% margin.

When de Blasio escaped indictment, Bradley Tusk, who ran Bloomberg’s third winning campaign for mayor, ended his yearlong crusade to convince a credible candidate to take him on.

“Campaign finance rules favor incumbents and special interests control primaries,” he explained.

At least we have a contested mayoral race to look forward to in 2021. But four years is an eternity in politics.