New York will postpone its April 28 presidential primary until June 23, Gov. Andrew M. Cuomo announced on Saturday, buying time for the state to administer an election as it struggles to respond to the escalating coronavirus outbreak.

“I don’t think it’s wise to be bringing a lot of people to one location to vote, a lot of people touching one doorknob, a lot of people touching one pen,” Mr. Cuomo said in a news conference. “So we are going to delay that and link it to an election that was previously scheduled on June 23.”

A primary for state legislative and congressional races had already been set for June 23, and now all of the state’s primary elections will be held on the same date, he said.

More than a dozen other states have rescheduled their primary elections as the campaign calendar has been upended by the outbreak, citing guidance from health officials who have urged people to avoid gathering spots, including polling places. Some of those states have switched to voting entirely by mail and have extended deadlines for doing so.