Mayor Bill de Blasio has touted his heavily subsidized ferry service as a tool in his war on economic and social inequality — but long-awaited ridership data released Tuesday tells an entirely different story.

Ferry users are overwhelmingly white, wealthy and come from waterfront neighborhoods, according to surveys of over 5,000 riders conducted in June by the city’s Economic Development Corporation, which manages the service.

Just 36% of riders are people of color, while 65% make over $75,000 per year, the survey found.

Despite that, the de Blasio administration has couched its $9.34-per-rider ferry investment in terms of “equity” and “access,” arguing that its $9-per-rider subsidy is a worthy investment for neighborhoods historically underserved by the city’s transit system.

But the data offers little evidence that commuters are the ones using the the boats.

Overall, just 35% of riders use the service regularly — or more than four trips per week. The majority of survey respondents — 51% — said they either seldom ride it or were riding it for the first time.

And while the majority of weekday riders take four or more trips per week, such riders account for just 10% of ridership on the weekends — when the boats are far busier, according to separate data from the service.

“If the ferry service was created in the first place to solve inequities then the city failed. It’s a reinforcement to communities of color that they don’t matter,” Queens Councilman Donovan Richards told the Post. “This ferry system is a glaring example of the haves and the have-nots.”

Richards’ district is one of the most diverse in the city — but home to its whitest ferry route. The Rockaway peninsula is 39 percent black and 33 percent white, but 72 percent of riders on the Rockaway-bound ferry route are white.

The city has spent $673 million on building out and operating the ferry system — which serves fewer than 18,000 people on the average weekday. By comparison, it has shelled out $292 million on a two-year plan to improve speeds on buses, which carry nearly two million daily riders.

Public subsidies for the ferries far outpace those for the city’s other transit options, according to report released earlier this year by city Comptroller Scott Stringer.

Barista Gary Ferreira, 28, of Jamaica, told The Post other riders should get a piece of the pie.

“These ferry commuters, they have subways and buses available, but they’re choosing ferries for [the same reason] I’m willing to pay more for the LIRR. Why are we subsidizing their choices?” he said.

Additional reporting by Nolan Hicks and Nick Fugallo