Janet Amponsah (born 12 April 1993) is a Ghanaian sprinter. She represented her country at the 2013 World Championships without qualifying for the semifinals. She won medals in the 4 × 100 metres relay at two African Championships and at the 2010 Commonwealth Games. She was selected as Ghana's flag bearer at the opening ceremony of the 2014 Commonwealth Games and voted the 2015 Ghanaian Female Athlete of the Year. She missed the 2015 World Championships in China due to problems with her entry visa. At the 2016 Olympics, she competed in the 200 m and 4 × 100 m relay events.