This report presents information from the 2000 United States Census on gay and lesbian families. It notes that the 2000 numbers for same-sex unmarried partner households are a dramatic increase from 1990, but the total number still represents an undercount of the actual number of gay or lesbian coupled households in the country. The Human Rights Campaign estimates that the 2000 U.S. Census count of gay and lesbian families could be undercounted by as much as 62 percent. The 2000 Census reported 601,209 total gay and lesbian families (as opposed to 145,130 in 1990), with California, New York, Texas, and Florida leading the country in total number of same-sex unmarried partner households. Gay and lesbian families live in 99.3 percent of all counties in the United States, compared to 52 percent of all counties in 1990. Many gay and lesbian families live outside major metropolitan areas. Census 2000 reports 88,606 or 15 percent of gay and lesbian families are living outside of metropolitan statistical areas in rural settings. As more information is released from the Census Bureau, the number of children living in gay and lesbian coupled households, income levels, racial profiles, home ownership, and other important demographics may be determined. (SM)