Oz Wiki

Omaha is the largest city in the state of Nebraska. It was the birthplace of the Wizard of Oz before he visited and later emigrated to the Land of Oz.

Formally, Omaha was founded in 1854 by settlers from nearby Council Bluffs, Iowa, though the earliest arrivals dated back to the 1840s. These facts would limit Digg's age at the time of the adventures recorded in The Wonderful Wizard of Oz.