Mott was married to Ruth Eleanor Horder, and had two daughters, Elizabeth and Alice. Alice was an educationist who worked with Claus Moser and married the mathematician Mike Crampin who was a Professor of Mathematics at The Open University. Neville Mott retired to live near the Crampins in Aspley Guise, Milton Keynes, where he died on 8 August 1996 at the age of 90. His autobiography, A Life in Science, was published in 1986 by Taylor & Francis. His great grandfather was Sir John Richardson, the arctic explorer.