Leslie Keighley is the son of Norman Keighley and Frances Guest King.

Leslie was born in 1924 in the Knaresborough Registration District (Jun Qtr).

Leslie married Nancy A. W. Dufton in 1945 in the Leeds Registration District (Sep Qtr).

He had the following children from his marriage to Nancy A. W. Dufton:

- Eileen C. Keighley	born in 1950 at the Leeds Registration District (Sep Qtr).
- John P. Keighley	born in 1957 at the Leeds Registration District (Mar Qtr).
- Peter J. Keighley	born in 1963 at the Leeds Registration District (Mar Qtr).

Details of Leslie's occupation are not known.