Smoking a ham to perfection takes around 3 hours but sometimes ham can be smoked in as little as 2 hours.
When smoking my ham I like to smoke it perfection so I always smoke my hams for 3 hours minimum to allow it to cook through and give it a nice flavor.
When smoking a ham a good rule of thumb with ham is to allow 15 to 20 minutes of smoking or cooking time per pound of ham.
But for most hams 3 hours of smoking or cooking time is usually more than enough to smoke or cook the ham all the way through.
Some hams are already cooked and just need smoked or heated up depending on how you like your hams.