Can you leave a hamster on its own for 2 weeks?

If there is no one to check on the hamster, I would not extend it past 3 days. For example, if it is a weekend and you left Friday morning, make sure you are back by Sunday evening. If absolutely necessary, you COULD give your hammy at leasat 2 full food bowls and at least 16 oz. of fresh water. That could last them up to 5 days, but it is not recommended. If there is anyone who can just check in once a day to refill food bowl(s) and water bottle(s) that would be the better solution.