It was the first gold medal won by a country other than South Korea, which went 4 for 5 in archery over the Olympics.
Clarisse Agbegnenou, Alex Clerget and Teddy Riner all won their bouts before Sarah Leonie Cysique clinched it with a narrow victory over fellow lightweight Tsukasa Yoshida.
Ledecky finished the Tokyo Games with two golds, two silvers and a fifth-place finish in the 200 free.