Walter Bywater was born around 1874 in Birmingham, Warwickshire.

Walter married Amy Florence Mould in 1896 in Birmingham, Warwickshire.

He had the following children from his marriage to Amy Florence Mould:

- Gladys Amy Bywater	born in 1900 at Coventry, Warwickshire.
- Walter Bernard Bywater	born in 1903 at Coventry, Warwickshire.
- Grace Evelyn Bywater	born in 1904 at Coventry, Warwickshire.
- Harold Bywater	born in 1907 at Northfield, Birmingham, Warwickshire.
- Kathleen Mary Bywater	born in 1911 at Northfield, Birmingham, Warwickshire.
- Richard A S Bywater	born in 1913 at Northfield, Birmingham, Warwickshire.

Walter was a Clerk.

Details of Walter's death are not known.