Publishers
- Y. Lolfa 1
- Y. Lolfa Cyf. 1
- Yale Centre For British Art 1
- Yale University Press 40
- Yearling Books 1
- Yeoman Publishing 1
- Yore Publications 1
- Yorkshire Air Museum 1
- Yorkshire Archaeological Society 4
- Yorkshire Dales Landscape Research Trust 2
- Yorkshire Sculpture Park 1
- Young World Productions 3
- Ystalyfera 1