A government report indicates that the numbers could be even higher.
Rep. Jane Harman, D-California, spoke before a House panel investigating the way the military handles reports of sexual assault.
She said she recently visited a Veterans Affairs hospital in the Los Angeles area, where women told her horror stories of being raped in the military.
"My jaw dropped when the doctors told me that 41 percent of the female veterans seen there say they were victims of sexual assault while serving in the military," said Harman, who has long sought better protection of women in the military.
"Twenty-nine percent say they were raped during their military service. They spoke of their continued terror, feelings of helplessness and downward spirals many of their lives have taken since.
"We have an epidemic here," she said. "Women serving in the U.S. military today are more likely to be raped by a fellow soldier than killed by enemy fire in Iraq." CNN.com