The American Civil Liberties Union states that, in 1898, Utah was the first state to allow women to sit on juries. By 1927, 18 states had followed suit.
According to the ACLU, in 1879, the U.S. Supreme Court gave states the right to refuse to open juries to women. Although some states started opening the doors of their jury rooms to all, this was not universal. Ms. Magazine reports that even as late as 1975, some states were not requiring women to serve on juries. In fact, in some states, women were only called for jury duty if they submitted a written request indicating that they wished to be considered. The Supreme Court disallowed the automatic exemption of women in 1975, according to Ms. Magazine.