Adult lions typically weigh between 265 and 420 pounds. A lion's weight is impacted by its subspecies and gender. The Asiatic subspecies of lions generally weigh more than African lions, and male lions typically weigh more than female lions.

Male lions are generally larger than female lions. Fully grown male lions typically weigh about 420 pounds, whereas fully grown female lions weigh around 280 pounds. Adult lions indigenous to Asia, which are the larger and heavier of the lions, can weigh between 300 and 500 pounds. As of 2014, the heaviest male lion ever recorded weighed in at approximately 600 pounds.