Bro Rhosyr is an electoral ward in the south of Anglesey, Wales, created in 2012.
Bro Rhosyr includes the communities of Llanidan (Brynsiencyn), Llanfihangel Ysgeifiog (Gaerwen), Llanddaniel-fab and Llangristiolus. The ward elects two county councillors to the Isle of Anglesey County Council.[1] Bro Aberffraw ward lies to the southwest while the Aethwy ward lies to the northeast. Canolbarth Môn borders to the north.[2]
Bro Rhosyr was created following the Isle of Anglesey electoral boundary changes in 2012, which created 11 multi-councillor wards from 40 single-councillor wards.[1] The new ward replaced the former Llanidan county ward and parts of the wards of Bodffordd, Bodorgan and Llanfihangel Ysgeifiog which had each elected their own county councillor.