Publishers
- Y. Lolfa 1
- Y. Lolfa Cyf. 1
- Yale Centre For British Art 1
- Yale University Press 17
- Yearling Books 1
- Yeoman Publishing 2
- Yerba Seca Publications 1
- Yore Publications 1
- Yorkshire Archaeological Society 3
- Yorkshire Architectural & York Archaeological Society 1
- Yorkshire Dales Landscape Research Trust 1
- Young World Productions 3
- Ystalyfera 1