Kadoma (門真市, Kadoma-shi) is a city located in Osaka Prefecture, Japan. The city was founded on August 1, 1963.
As of 2010, the city has an estimated population of 128,034 and a population density of 10,430 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.
In 2005, it was planned to merge Kadoma with the neighboring city of Moriguchi, however the plan was cancelled.