Officers said Solo was intoxicated early Saturday when she was accused of assaulting her sister and 17-year-old nephew.
But her lawyer, Todd Maybrown, says she was a victim in the altercation.
Solo was booked into jail for investigation of two counts of fourth-degree domestic violence assault, pending her appearance in Kirkland Municipal Court.
The 32-year-old Solo grew up in Richland and attended the University of Washington. She has won two Olympic gold medals with the US women's national team and also plays with the Seattle Reign of the National Women's Soccer League.