Final answer:
Sandra Day O'Connor, the first woman to serve on the U.S. Supreme Court, was appointed by President Ronald Reagan in 1981.
Step-by-step explanation:
The first woman ever to serve on the U.S. Supreme Court, Sandra Day O'Connor, was appointed by President Reagan. O'Connor was an attorney from El Paso, Texas, and she took her place as the first female Supreme Court justice in 1981. Although appointed by a conservative president, O'Connor did not always strictly adhere to conservative expectations, particularly in regards to women's rights and the issue of abortion, where she upheld the legality of abortion in several cases.