Llandeilo Urban District was an urban district covering the town of Llandeilo in Carmarthenshire, Wales. It had its origins in a local government district created in 1859; such local government districts were converted into urban districts in 1894. It was abolished in 1974 and replaced by Dinefwr.
The five members elected at the head of the poll at the initial elections now stood for re-election. One of their number, Jenkin Jones, stood down so there was no contested election.
Ten candidates contested this election, which was fought on party lines.
Only two sitting members sought re-election and they were returned at the head of the poll.
T.F. Powell, who ran second to Nichols three years earlier. lost his seat having been indisposed in the days before the election.