Donovan Koch (born 11 October 1976) is a South African former cricketer and currently an international umpire. He played twenty-one first-class and twenty List A matches between 1997 and 2002. He is now an umpire in Australia.
He stood in his first Twenty20 International (T20I) match, between Australia and Sri Lanka, on 13 February 2022. On 31 August 2022, he stood in his first One Day International (ODI) match, between Australia and Zimbabwe. As of January 2023, he has officiated in 20 international fixtures.