Stephanie Charlene Cooper-Foster MBE (born 2 September 1958), best known under her maiden name Stephanie Foster, is a former New Zealand rower.
She represented New Zealand in the single sculls event at the 1984 Olympics, coming seventh overall. At the 1986 World Rowing Championships at Nottingham in the United Kingdom, she won a Bronze in the women's double sculls with Robin Clarke. She was the flagbearer at the 1986 Commonwealth Games, and won golds in the Women's Single Sculls and in the Women's Double Sculls with Robin Clarke.
In the 1987 Queen's Birthday Honours, Foster was appointed a Member of the Order of the British Empire, for services to rowing.