An election to the Carmarthenshire County Council was held in April 1958.
A close run election resulted in Labour narrowly regaining control of the authority.
The Carmarthen Journal bemoaned the lack of organization amongst the Independents, compared with Labour and referred to the haphazard methods of nomination, particularly in rural areas.
These included a Plaid Cymru councilor at Ammanford in favour of retiring Labour alderman, John Harries.
[2] In Llanelli, where many wards had been closely contested at previous county elections, Labour candidates were returned unopposed in all nine divisions.