This is a list of members of Parliament (MPs) elected to the House of Commons of the United Kingdom by Welsh constituencies for the Forty-First Parliament of the United Kingdom (1955–1959).
Most MPs elected for Welsh constituencies at the 1955 United Kingdom general election, held on 26 May 1955, served a full term, but there were three by-elections.
The list is sorted by the name of the MP.
There were three by-elections during this period: