Napsbury Hospital was a mental health facility in London Colney near St. Albans in Hertfordshire.

[1] The hospital was designed by Rowland Plumbe in the country estate style and was initially known as the Middlesex County Asylum.

[4] According to the Middlesex County Record, the initial cost, including land and equipment, was £545,000, or £473 per bed.

[8] Although Napsbury suffered some bomb damage in the Blitz, it was in continuous use as a hospital until its official closure in 1998.

[3] Due to its largely untouched parkland, Napsbury was listed by English Heritage as a Grade II Historic Park and Garden in 2001.