What is Russian Dwarf Hamsters Lifespan? You should put this into consideration when getting a pet hamster. Usually, hamsters have a brief lifespan. That their lifespan averages 2 years doesn’t mean it won’t die earlier than 1 or 2 years. Nevertheless, if you'll be able to prolong the longevity of your dwarf hamsters by how properly you care for them. With proper care and fixed treatment from a vet. Your hamsters cannot solely live longer but also live healthy, enjoyable, and blissful.