Count of Viana (in Portuguese Conde de Viana) was a Portuguese title of nobility granted on February 8, 1692, by King Peter II of Portugal to D. José de Menezes (grandson of Pedro de Menezes, 2nd. Count of Cantanhede), the King's master-stableman, who died without issue.
This title was granted again, by Prince regent John, on May 13, 1810, to D. João Manoel de Menezes, son of Domingas Manoel de Noronha, 3rd. Marquesse of Tancos.
The 2nd. Count had his title upgraded to Marquis by King John VI royal decree issued on July 3, 1821, (D. João VI).