As of 2004, the city has an estimated population of 135,992 and the density of 11,074.26 persons per km². The total area is 12.28 km².
Kadoma is located northeast of Osaka on the Keihan Railway, and is connected to Osaka's other northern suburbs by the Osaka Monorail. The city is well-known within Japan as being the site of the headquarters of Matsushita (National/Panasonic).
The city was founded on August 1, 1963.