Bellwood is the name of the town where Ben, along with other characters live in.

As seen in A Jolt From The Past
Locations
Mr. Smoothy
Ben's favorite beverage shop has 23 franchise locations in Bellwood, with the 23rd being a dimension-skipping one.
Burger Shack
Ben's favorite fastfood restaurant.
Max's Plumbing/Plumber Base
Introduced in Ben 10:Alien Swarm and Omniverse as new base for Plumbers.