There are many websites that are of use to people interested in the history of Ceredigion. Some of the more obvious ones are:
Ceredigion Archives: The main repository for public and private records relating to Ceredigion.
Ceredigion Museum: Housed in the old Colosseum Cinema in Aberystwyth, and full of fascinating objects relating to the history of the county. Plus a list of museum events. There is also a separate site that has images of some of the objects in the museum collections.
National Library of Wales: Although focused now on collections of national importance, there are many archives and books of particular interest to those interested in Ceredigion. Other fascinating resources include Welsh Journals, Tithe maps, Place Names and Newspapers Online.
The Royal Commission on Ancient and Historical Monuments of Wales: A large collection of information relating to the history of the buildings and historic monuments of Wales, including those in Ceredigion. It also manages Coflein, the online database for the National Monuments Record of Wales (NMRW) – the national collection of information about the historic environment of Wales. The commission also manages the List of Historic Place Names.
Dyfed Archaeological Trust: One of four Welsh Archaeological Trusts, established to advance the education of the public in archaeology. It is committed to working to help protect, record and interpret all aspects of the historic environment.
Ceredigion Local History Forum: Group who bring together all the local and family history societies and similar organisations in the county.
Llansantffraed History Society: A local history resource for Llanon and the surrounding area.
Pint of History: is a project about pubs. Pubs in Ceredigion. Old pubs, new pubs, beer houses, ale houses, taverns, inns, hotels, railway waiting rooms and breweries.