The National Library of Wales. (NLW) Aberystwyth. The major repository of information relevant to Welsh genealogy, such as Bishop's Transcripts of Parish Registers, Marriage Bonds and Allegations, Nonconformist Records, Probate Records, Tithe Maps and Apportionment Schedules, Legal and Administrative Records, Estate Records and Personal Papers, Pedigree Books, Newspapers, etc.
Hugh Owen Library, Penglais Campus, Aberystwyth, SY23 3DZ. 01970 622399
This is the main library of the University of Wales, Aberystwyth- includes a Celtic Collection.
Ceredigion Archives. Aberystwyth. E-mail Ceredigion Archives.
Their Collections Catalogue summary is a must visit page and as an example of their extensive holdings, at June 2017 their Featured Collection section contained;
- The Hafod Uchtryd Estate Collection
- The Friends of Hafod Collection
- The Gwilym Evans/Beekeeping/Welsh Plant Breeding Station Collection
- The New Quay Harbour Company
- Searchable database of early vehicle registrations in Cardiganshire
Ceredigion Public Libraries
The Royal Commission on the Ancient & Historical Monuments of Wales (RCAHMW), Plas Crug, Aberystwyth, SY23 1NJ 01970 621200 Fax 01970 627701
This is the library of the government organization responsible for surveying and recording the archaeological and built heritage of Wales. It also curates the National Monuments Record for Wales (NMRW) which holds the national collection of information about the historical environment. Coflein combines information about the NMRW archive collections.
Ceredigion Museum - "Has a collection of about 60,000 items from the county of Ceredigion. The majority of specimens are objects that were made or used in the county between about 1850 and 1950."
The National Archives (TNA) has details of many archive repositories in the UK with links to their web sites, if any.