Jan Blaha (March 12, 1938 – December 13, 2012) was a Czech clandestine Roman Catholic bishop.
After the Velvet Revolution he no longer ministered as a bishop.
Ordained to the priesthood on July 12, 1967, Blaha was secretly ordained a bishop on October 28, 1967 because of the Communist Government of Czechoslovakia and the persecution of the Roman Catholic Church by the government.
He secretly ordained as a bishop Felix Maria DavÃdek, who was his teacher in the clandestine Church.