Alder Hey Children's Hospital is a children's hospital and NHS foundation trust in West Derby, Liverpool, England. It is one of the largest children's hospitals in the United Kingdom, and one of several specialist hospitals within the Liverpool City Region, alongside the Royal Liverpool University Hospital, Liverpool Women's Hospital, Liverpool Heart and Chest Hospital, the Walton Centre, Mersey Regional Burns and Plastic Surgery Unit, and Clatterbridge Cancer Centre.

West Derby is a suburb of Liverpool, England. It is located east of the city and is also a Liverpool City Council ward. At the 2011 Census, the population was 14,382.