How many of people who flew on Space Shuttle missions were women?

Women who flew on the Space Shuttle by country:

44 American

2 Canadian

2 Japanese

1 Russian

49 total

This includes Christa McAuliffe, who died on the Challenger on January 28, 1986.

FYI: The Russian (Soviet) space program has also launched 7 women in space who did not fly on the shuttle (as of 6-15-2010), and there have been 4 women who have flown on both the shuttle and the Russian program, for a total of 56 women in space. The first was Valentina Tereshkova launched on the Soviet program on June 16, 1963.