from www.letcaliforniaring.org:

By the Numbers
Key Facts about Gay and Lesbian Couples in the U.S.

Gay and lesbian couples live in 99.3 percent of all counties nationwide.
There are an estimated 3.1 million people living together in gay or lesbian relationships in the United States.
Fifteen percent of these couples live in rural settings.
Between 1 million and 9 million children are being raised by gay, lesbian and bisexual parents in the United States today.
The highest percentages of these couples raising children live in the South.
Nearly one in four gay and lesbian couples includes a partner 55 years old or older, and nearly one in five is composed of two people 55 or older.
More than one in 10 gay and lesbian couples include a partner 65 years old or older, and nearly one in 10 of these couples is composed of two people 65 or older. The states with the highest numbers of senior gay or lesbian couples are also the most popular for straight senior couples: California, New York and Florida.These facts are based on analyses of the 2000 Census conducted by the Urban Institute and the Human Rights Campaign. (See GAY AND LESBIAN FAMILIES IN THE UNITED STATES: SAME-SEX UNMARRIED PARTNER HOUSEHOLDS: A Preliminary Analysis of 2000 United States Census Data. August 22, 2001 by David M. Smith, Communications Director & Senior Strategist, Human Rights Campaign and Gary J. Gates, Ph.D., Population Studies Center, The Urban Institute; Report at www.hrc.org)