Aberaman, Abercanaid, Abercwmboi, Aberdare / Aberdâr, Aberfan, Abermorlais, Abernant, Blaenllechau, Cae-draw, Cae-pant-tywyll, Caegarw, Cefn-coed-y-cymmer, Cefnpennar, Clwydyfagwyr, Cwmaman, Cwmbâch, Cwmdare, Cwmpennar, Darranlas, Dowlais, Ferndale, Ffos-y-frân, Gadlys, Galon-Uchaf, Gellideg, Georgetown, Glebeland, Glenboi, Godreaman, Gurnos, Heolgerrig, Hirwaun, Incline Top, Llwydcoed, Maerdy, Merthyr Tydfil / Merthyr Tudful, Miskin, Morgan Town, Morlais Castle, Mountain Ash / Aberpennar, Mountain Hare, Pen-y-Darren, Pen-yr-englyn, Penderyn, Pentre, Pentrebach, Penyard, Penyrheol, Penywaun, Perthcelyn, Rhyd-y-car, The Quar, Thomas Town, Tre-Gibbon, Tre-Ifor, Trecynon, Trefechan, Treherbert, Treorchy / Treorci, Troedyrhiw, Twyn Bryn-hîr, Twynyrodyn, Tydfil's well, Tylorstown, Upper Abercanaid, Williamstown, Winch Fawr, Ynys-fach, Ynyswen, Ysgubor Newydd