Takeo is a city located in Saga Prefecture on the island of Kyushu, Japan. In 2011, the city government was the first in Japan to switch to using Facebook for its website. As of October 1, 2016, the city has an estimated population of 48,845 and a population density of 257 persons per km². The total area is 195.44 km².
On March 1, 2006, the towns of Kitagata and Yamauchi were merged into Takeo.