The Canadian-born Ghanaian recorded a time of 2:16.02.
Ghana Twitter was impressed with the performance of the first female Ghanaian swimmer at the Olympic Games and here are the reactions:
Pulse Akoto was just proud of Kaya Forson
Fiucha Gill Bates just saw it but still happy for the 14-year-old
Eunice wants us to wait for just four more years
King George Armani can't take the trash anymore
Kaya wants to inspire others
Awww ... so sweet
She's just 14 years you know
A lot of people are proud
All the very best to Team Ghana in the rest of the competitions.