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-Second Parliament of the United Kingdom (1959–1964).
Most MPs elected for Welsh constituencies at the 1959 United Kingdom general election, held on 8 October 1959, 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: