Swartz and Iseminger lost bids for re-election last month. Schnebly chose not to run for another term. Each served one term that began in 1998.
"It's hard to say good-bye," Iseminger said just after the meeting. "It's been a wonderful time of my life, and I'll never forget it."
The outgoing commissioners received plaques, framed pictures and other gifts at a reception held in their honor following the meeting.
Snook presented Schnebly and Swartz with a framed photo of the two together. The photo showed Schnebly, donning a balloon hat, and Swartz, as both were getting ready to sing, Snook said.
Snook gave Iseminger a framed picture of the commissioners' final golf outing together.
The three commissioners also were presented clocks on behalf of county employees. The clocks contained the names of the commissioners, their years of service and a quote that choked up Snook after he read it aloud.
"Time goes on, but friends and memories are forever," the quote read.
For their leadership and commitment toward public safety, Director of Emergency Services Director Joe Kroboth and other emergency service personnel gave the three departing commissioners miniature replicas of speaking trumpets, devices once used by fire chiefs to shout out orders on the scene.
Washington County Highway Department Director Ted Wolford appointed the three as honorary members of the Highway Department, and Hagerstown Regional Airport officials gave them miniature wooden replicas of the airport.
Human Resources Director Alan Davis described Iseminger as "staff leader extraordinaire" for his commitment to county employees.
"I've had a great four years," Schnebly said. "There's no greater way to affect outcomes and serve the community."
Swartz said losing the election was one of life's lessons, and that he'll miss the intelligence of Schnebly and Iseminger.
"The county is really going to hurt bad for losing this knowledge and this intelligence," Swartz said.
Swartz challenged the new board to move the county forward with dignity, just as the outgoing board has done.
"That's your challenge," he said. "Make sure you provide the service for the people."