One of the Big Apple’s oldest veterans got a City Hall salute for his 101st birthday Tuesday, including a meeting with Mayor Bill de Blasio and proclamation celebrating his centenarian status.

“I was proud to be there,” wheelchair-bound World War II veteran Sidney Walton told The Post after meeting the mayor. “This is very exciting.”

Born and bred on the Lower East Side, Walton’s City Hall visit was the latest his latest on his whirlwind two-year-long “No Regrets” tour of capitals across the country to raise awareness about the sacrifices made by the Greatest Generation.

He met President Donald Trump and the French leader, Emmanuel Macron, at the June remembrance of the D-Day invasion in Normandy, France. And he visited with Gov. Andrew Cuomo in Albany in 2018.

All told, he’s visited with 26 governors across the country since 2018 — with trips from Massachusetts and Connecticut to California and half the states in-between.

Walton enlisted in the Army in the Spring of 1941 to fight Hitler and served as a medic in India during the war.

He was joined by his son and daughter, Paul and Judy, during his meeting with Hizzoner, where de Blasio gave him the “Sidney Walton Day” proclamation.

Paul said the meeting was “fantastic.”

But Tuesday’s honors didn’t get off without a hitch.

Paul — who served as chauffeur — accidentally tried to drive to City Hall through a set of security gates that are closed to traffic, temporarily flummoxing the building’s police detail.

“It was just ironic that the doors opened when he came to the White House, but here when he came to meet with the mayor, the doors did not open,” he added. “But it’s OK because it’s our fault because we came in the wrong entrance.”