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The district's name is that of its northernmost point, the promontory Cemaes Head, though it may also hark back to the Cantref of Cemais, which existed from Norman times, and as the Hundred of Cemais from the 16th century.
The Council comprised councillors and a chairman, and its responsibilities included sanitary services, sewerage, refuse collection, maintaining local roads, cemeteries and parks, licensing of public entertainments, water supply and housing. It became a rating authority in 1925. Rural District Councils were administered by a number of committees and by appointed officers including a Clerk, Treasurer, Public Health Inspector, Housing Officer, Surveyor and Rating Officer.
- "Archives Wales: Cemaes Rural District Council Records". Archived from the original on 5 March 2017. Retrieved 9 September 2016.