Oddny Ballo Aleksandersen (born 5 February 1942), is a Norwegian politician for the Labour Party. Born in Vadsø, she chaired the local party chapter in Vadsø from 1979 to 1982 and was a member of the executive committee of Vadsø municipal council from 1979 to 1983. Elected to the county council in 1983, she served as deputy county mayor for one term, and acting county mayor from May 1986 to April 1987, during the illness of county mayor Helmer Mikkelsen.