Katherine O'Connor (born 12 December 2000) is an Irish track and field athlete, who competes in the heptathlon and indoor pentathlon. O'Connor competed for Northern Ireland at the 2018 Commonwealth Games, finishing eighth in the heptathlon. She won a silver in the heptathlon at the 2019 European Athletics U20 Championships in Borås, Sweden. O’Connor won a silver medal at the 2022 Commonwealth Games on August 3rd competing in the heptathlon.