List of Portuguese monarchs

This is a list of Portuguese monarchs who ruled from the start of the Kingdom of Portugal, in 1139, to the start of the Portuguese Republic with the 5 October 1910 revolution.
During the 800 years, the kings had different titles and pretensions. Two kings of Portugal, Ferdinand I and Afonso V, is also the Crown of Castile. When the House of Habsburg took over, the kings of Spain, Naples, and Sicily also became kings of Portugal. The House of Braganza also had royalty outside Portugal, including King of Brazil.
Different royal families have ruled Portugal. These houses are: