Changyi (昌邑 ; pinyin: Chāngyì) is a county-level city of Weifang in the northwest corner of Shandong province, People's Republic of China. The city is 1627.5 square kilometers in area, with a household population of 581,000 as of 2010. The city is under the administration of the Changyi Municipal People's Government, with 3 neighborhoods, 6 towns, 691 administrative villages, and one special economic development zone.