The Isle of Anglesey County Council (Welsh: Cyngor Sir Ynys Môn) is the local authority for the Isle of Anglesey, a principal area with county status in Wales. Since 2022 the council has 35 councillors who represent 11 multi-member electoral wards.
The first county council for Anglesey was created in 1889 under the Local Government Act 1888, which established elected county councils to take over the administrative functions of the quarter sessions. The original county council did not include "Isle of" in its name, simply being called "Anglesey County
