Who was the first woman judge of the Supreme Court of the United States ?

The correct choice is: “Sandra D. O’Connor”

Sandra Day O’Connor was nominated by President Ronald Reagan and joined the US Supreme Court in September 1981 as its first woman Justice. She served until 2006.

“Ruth Ginsburg” (Ruth Bader Ginsburg, appointed in 1993) was the second woman Justice. “Amy Barrett” (Amy Coney Barrett) joined in 2020. “Ketanji Jackson” (Ketanji Brown Jackson) was confirmed in April 2022 as the first Black woman Justice, not the first woman Justice.