All kids are really different with naps and some can drop them alot earlier than other's.
I use to work at a inhome daycare and we got rid of the morning nap between 12mos. and maybe 18mos. If the child just couldn't stay awake we would let them drift off for 30min. and wake them up, and every few days we would take more time off til they were done with their morning nap. We did this because otherwise they didn't take good afternoon naps.
I know some babies that take a morning nap until 2 years old and other's who give it up at 6mos. old. It all depends on your child.
My daughter is almost 6years old and still takes naps all the time.