William Steer
- Nationality: United Kingdom
- Rank: Driver
- Regiment/Service: Royal Field Artillery
- Unit: 29th Div, Ammunition Col.
- Joined: 17/1/1915
- Served: in Egypt 7 months 29th Div.
- Drowned in Med. 23/10/1915
- Age: 21
- Service No: 68946
- Casualty Type: Commonwealth War Dead
- Grave/Memorial Reference: MIKRA MEMORIA Greece
of 42, Ockford Rd; son of Mrs Mary Ann Steer of 24, Nutley Lane, Reigate