According to 2003 census data, over one-third of American households did not own a computer. Of the households that did own a computer, a little more than 50% had Internet access:

Wealthier, more educated households with school-age children were most likely to have Internet access. While only 45 percent of African-American and Hispanic homes had Web access, 67 percent of Asian homes and about 65 percent of white families had access. People over 65 were least likely to have a computer or Internet access.

This news article was written on October 31, 2005, quoting Tech News World.