Aidu may refer to:
Aidu, Ida-Viru County, village in Maidla Parish, Ida-Viru County, Estonia Aidu, Jõgeva County, village in Pajusi Parish, Jõgeva County, Estonia Aidu, Viljandi County, village in Paistu Parish, Viljandi County, Estonia
See also Aizu, third of Fukushima Prefecture, Japan