Family violence accounted for 11% of all reported and unreported violence between 1998 and 2002.   About 22% of murders in 2002 were family murders. Of the nearly 500,000 men and women in State prisons for a violent crime in 1997, 15% were there for a violent crime against a family member.  Of the nearly 500,000 men and women in State prisons for a violent crime in 1997, 15% were there for a violent crime against a family member. 

An estimated 906,000 children were determined to be   victims of child abuse or neglect for 2003. The rate of victimization per 1,000 children in the national   population has dropped from 13.4 children in 1990 to 12.4 children in 2003.

Reference - http://www.acf.hhs.gov/programs/cb/publications/cm03/summary.htm#backfigureone

“Females were more likely than males to be victimized by family violence, and more likely than males to be victimized by specific types of family violence. Females were 51.6% of the U.S. population age 12 or older between 1998 and 2002 but 73.4% of the Nation’s victims of family violence similarly, females were about 50% of all spouses and romantic partners but were 84.3% of spouse abuse victims and 85.9% of the victims of violence between boyfriends and girlfriends.”

“The roughly 3.5 million violent crimes committed against family members during 1998 to 2002 consisted of the following: 48.9% were crimes against a spouse; 10.5% were sons or daughters victimized by a parent; and the remaining 40.6% were crimes against other members of the offender's family (for example, parents victimized by sons or daughters, brothers victimized by siblings, and grandparents victimized by grandchildren).”

Excerpts from US Justice Dept Report on Family Violence Statistics -   http://www.ojp.usdoj.gov/bjs/abstract/fvs.htm