An election to Preseli Pembrokeshire District Council was held in May 1991.
On the same day there were elections to the other district local authorities and community councils in Wales.
No election was held as the sitting member, Jack Lewis, was unopposed; however, he died before polling day.
A by-election was held in the Burton ward following the death of the sitting member shortly before the 1991 election.
[2] A by-election was held in the St Dogmaels ward after no nominations were received for the regular election.