|Type||Competed in Olympic Games|
|Born||30 January 1875 in Zwolle (NED)|
|Died||15 September 1944 in Zwolle (NED)|
|Affiliations||Njord, Leiden (NED)|
Walter Middelberg, a student of chemistry, was a crewman of the Minerva eight that competed at the 1900 Olympics and placed third.
|1900 Summer Olympics||Rowing||Coxed Eights, Men||Olympic||Minerva Amsterdam||3||Bronze||Representing Netherlands|