Ōsaka 10th district (大阪府第10区, Ōsaka-fu daijikku or 大阪10区, Ōsaka-jikku) is a single-member electoral district of the House of Representatives, the lower house of the national Diet of Japan. It is located in northeastern Osaka and consists of Takatsuki city and Shimamoto town, the only remaining municipality of county. As of 2016, 321,805 eligible voters were registered in the district. Before the electoral reform of the 1990s, the area had been part of the five-member .