Great question. The short answer is: most typical urban benches weigh between 80 and 250 pounds, so two people can carry one if it’s a standard metal or wood-slat bench. But it really depends on the material.
A common park bench with a steel or cast iron frame and wooden slats usually runs about 100 to 180 pounds. Lighter aluminum or steel tube benches might be 80 to 120 pounds. Heavier ornamental cast iron benches often go 150 to 250 pounds. Concrete, stone, or solid recycled plastic benches are a different story—they can easily weigh 400 to 800+ pounds, and I would not call those a two-person carry.
Two adults can generally handle a 100- to 200-pound bench, but the awkward shape matters more than the number on the scale. Benches are long, and if the weight shifts, one person suddenly gets loaded up. Use gloves, lift with your legs, and carry it close to your body. If possible, remove the back or legs if they’re bolted on, or use a furniture dolly. For anything over about 250 pounds, or for concrete and stone, bring a third or fourth person or use moving equipment.
So yes, for most standard urban benches, two people can carry them—just plan the route, communicate, and don’t turn a manageable bench into an injury.