Publishers
- Y Lolfa Cyf. 1
- Y. Lolfa 1
- Y. Lolfa Cyf. 1
- Yale Centre For British Art 1
- Yale University Press 23
- Yearling Books 1
- Yellow Jersey Press 1
- Yeoman Publishing 2
- Yerba Seca Publications 1
- Yore Publications 1
- Yorkshire Air Museum 1
- Yorkshire Archaeological Society 4
- Yorkshire Naturalists' union 1
- Young World Productions 3
- Ystalyfera 1