A rider advocacy group wants angry straphangers to vent at Gov. Andrew Cuomo rather than Mayor Bill de Blasio.

With the state budget deadline looming and no long-term transit funding plan in sight, the Riders Alliance launched a campaign Sunday, asking beleaguered commuters to rage at Cuomo and lawmakers in Albany who actually control the transit agency.

The group is pushing a script it wants commuters to use in calling the governor, state senators and Assembly members to demand more MTA funding.

“Only Gov. Cuomo can fix the subways,” Rebecca Bailin, campaign manager for the Riders Alliance, said at Atlantic Terminal in Brooklyn. “We need folks to tell Gov. Cuomo to fix this now.”

Like many of her fellow riders, Tinika Welsh, 25, said she didn’t know the MTA was a state agency. Still, she wants to blame de Blasio for some of the rail nightmares faced daily by New Yorkers.

“Even if it’s the state that’s putting out the money, I think it’s on the city to say it’s getting worse and worse every year, and tell the state what you’re doing is not enough,” the City Tech student said.

Jennifer Tang, 49, of Forest Hills, said Cuomo and de Blasio have to grow up. “They’re kind of like overgrown adolescents who squabble while the whole city suffers,” she said.

Cuomo’s office defended the governor’s subway record in a statement, citing funding of the state’s half of the Subway Action Plan, a proposal to send mobility tax revenue directly to the MTA and an $8.6 billion investment in the capital program.

“While some continue to simply talk about turning the subways around, the Governor is actually working to get it done,” spokesman Peter Ajemain wrote.