Mariano Díez Moreno (2 October 1949 – 18 June 2022) was a Spanish politician.
A member of the People's Alliance, he served in the Cortes of Castilla–La Mancha from 1983 to 1987 and was president of the Provincial Deputation of Toledo from 1987 to 1991.
Díez died in Madrid on 18 June 2022 at the age of 72.
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