About 510,000 people.

Mesa is a large, friendly city just east of Phoenix. Its name means table in Spanish, because of the flat land it sits on.
Visit the Arizona Museum of Natural History to see dinosaur bones, splash around at big water parks, and enjoy hands-on fun at the i.d.e.a. Museum for kids.
Mesa has a natural history museum with dinosaurs and a fun science center where kids can touch and build things.
Nearby lakes and the Salt River let families kayak, float on tubes, and cool off on hot days.