Diana Jeanette Rickard (born 5 October 1953), also known by her married name Diana van Hamburg, is an Australian former competition swimmer.
She competed at the 1968 Summer Olympics in the 100-metre backstroke and 200-metre and 400-metre individual medley events, but failed to reach the finals.She married the Dutch Olympic swimmer Roger van Hamburg.
Since about 2000 they run a swimming school near Sydney, Australia.
Their daughter Sasha is married to Adam Pine, also an Olympic swimmer.