Each of my kiddos was different. I had a child that napped still at 9--she'd come home after school and nap for an  hour. My other children were around First Grade age.

I swear my 5 yo never napped. Never in her whole life. Never. I may be exagerrating, but not by much. It was a huge battle. Nothing ever worked. My oldest quit napping regularly when she was 3 but would nap on occasion.

I honestly don't remember the ages of my older kids, but my youngest is on and off with them now at 3 1/2.  

Mine were done just about 4 years old. They did take the occasional nap on a weekend day but they were ready to stay awake for the most part.

My oldest napped until he was nearly 5. My second stopped shortly after his third birthday regularly, but then did on occasion.  

This one I remember...he was two years old. It's actually hard to imagine that he ever napped.

Mine is now 12 and still has a lot of energy. Never naps when sick unless he really feels really bad.