Wyoming suspended the in-person portion of its Democratic caucuses, saying residents would be able to either vote by mail or drop off their ballots at a county polling location.

Officials in Connecticut, Maryland and Pennsylvania said they were considering various measures to encourage voting by mail.

The Democratic Party of Georgia said it had endorsed the decision to delay the primary election in light of the public health emergency created by the coronavirus and the increased risk to both the public and poll workers.

“Our priority is to protect the health and safety of all Georgians and to ensure that as many Georgians as possible have an opportunity to vote,” said State Senator Nikema Williams, the party chairwoman. “Continued in-person voting could compromise both goals.”

Votes that have already been cast in person or by mail will still count, Ms. Williams said.

Responding to the delay, the campaign of former Vice President Joseph R. Biden Jr. reiterated a statement it made after Louisiana’s decision to delay its primary, to June 20.

“Voting is at the very heart of who we are as a democracy,” the Biden campaign said. “As election officials working with public health officials are demonstrating throughout the country, our elections can be conducted safely in consultation with public health officials.”

The decision by Georgia officials was mentioned briefly during a “fireside chat” live-streamed from Senator Bernie Sanders’s home in Burlington, Vt. on Saturday evening.