Do unmarried-partner households account for the lion's share of domestic violence? I think so, but it's hard to know for sure. There don't seem to be many statistics tabulated on the subject. Hopefully in Utah, with Senate Bill 242, that is about to change. In 2000, there were just over 54 million households in the United States that contained married couples , and there were about 5,500,000 households in where there were unmarried partners. The percentage of unmarried-partner households in 2000, then, was about 9 percent. About 7 or 8 years ago, after a presentation on domestic violence, I asked the police officer who had given the presentation what percentage of domestic violence occurred in unmarried-partner households. He told me that they didn't keep those kind of statistics, but that if he had to estimate based on his experience, 70% of domestic violence occurs in unmarried-partner households. If that's true, it definitely pays to make a marriage commitm...