List of counties and boroughs of the Unreformed House of Commons at 1800 Welsh boroughs Welsh boroughs

| Borough | County | Franchise_type | Members | Voters_in_1800 | Times_contested | Fate_in_1832 |
|---|---|---|---|---|---|---|
| Beaumaris | Anglesey | Corporation | 1 | 24 | 0 | Retained one seat |
| Brecon | Brecknockshire | Freemen | 1 | 12 | 0 | Retained one seat |
| Carmarthen | Carmarthenshire | Freemen | 1 | 500 | 5 | Retained one seat |
| Denbigh Boroughs ( Denbigh , Holt , Ruthin ) | Denbighshire | Freemen | 1 | 24 | 4 | Retained one seat |
| Haverfordwest | Pembrokeshire | Scot and lot | 1 | 500 | 3 | Retained one seat |
| Montgomery | Montgomeryshire | Freemen | 1 | 500 | 1 | Retained one seat |