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    28 S C I E N T I F I C A M E R I C A N M A R C H 2 0 0 5

    SCANnews

    Gay and Lesbian CensusA HARD-TO-MEASURE POPUL ATION STARTS COMING INTO FOCUS BY RODGER DOYLE

    BY

    THEN

    UM

    BERS

    Tabulating the U.S. gay and lesbian pop-ulations has never been easy. Not only

    are many people reluctant to discuss

    intimate matters, but also their sense of iden-

    tity evolves: todays gay man may have been

    straight yesterday. Like past efforts, the

    2000 U.S. decennial census undoubtedly un-

    dercounted them, but it does provide sub-

    stantial new informationspecifically, on

    those gays and lesbians who live together as

    couples.

    The census form asked respondents to

    classify any unrelated people in their house-

    hold as a housemate, boarder, foster child,

    unmarried partner or other nonrelative. If

    the unmarried partner is reported to be of

    the same sex, that partner and the respon-

    dent are very likely gay or lesbian. The cen-

    sus showed that 0.6 percent of men and 0.5

    percent of women 18 years of age and older

    live together as same-sex unmarried part-ners. The data provide a good indication of

    geographic distribution. The map shows the

    proportion of households that are gay or les-

    bian, and because of the likelihood of under-

    counting, it categorizes the dispersion of this

    populationby quintiles, rather than by ab-solute percentages. The map combines the

    three middle quintiles for simplicity.

    As might be expected, San Francisco has

    the highest concentration of gays and lesbi-

    ans; Washington, D.C., and New York

    Citys borough ofManhattan are not far be-

    hind. Perhaps surprisingly, gays and lesbians

    appear in high concentrations in all regions

    except for the Midwest, particularly the

    west-central region. And gays and lesbians

    do not merely abound in the big metropoli-

    tan areas; they live in smaller ones as well,

    especially college towns such as Blooming-

    ton, Ind., Iowa City, Iowa, Corvallis, Ore.,

    and Lawrence, Kans. Moreover, some non-

    metropolitan counties such as Presidio, Tex-

    as, Lyon, Kentucky, and Shannon,South Dakota, are among the top 50

    counties in terms of their propor-

    tion of gay and lesbian population.

    The 2000 census found that at

    least a quarter of a million children

    live in households headed by same-

    sex couples and that nearly one in

    five people in same-sex couples is 55

    and older. The number of unpart-

    nered gay and lesbian individuals

    can be estimated from survey data

    showing that 24 percent of gay men

    and 43 percent of lesbians are cou-

    pled. By extrapolation, the propor-

    tion of gay men in the population is

    2.5 percent and of lesbians 1.2 percent, con-

    sistent with earlier research.

    The two-to-one disparity is curious in

    light of studies showing that the percentages

    of those claiming sexual desire for the same

    sex is virtually identical for both men and

    women (7.7 and 7.5 percent, respectively).

    No conclusive explanation exists for this

    anomaly. Gary Gates of the Urban Institute

    in Washington, D.C., who co-authored therecently published Gay and Lesbian Atlas,

    notes the evidence that womens conception

    of sexual orientation may be more fluid than

    that of men. He suggests that women, al-

    though they may be as prone to same-sex

    attraction, may be less willing to label that

    attraction with a specific sexual orientation

    such as gay or lesbian.

    Rodger Doyle can be reached at

    [email protected]

    Sex in America: A DefinitiveSurvey. Robert T. Michael et al.Little, Brown, 1994.

    The Social Organizationof Sexuality: Sexual Practices

    in the United States.Edward O. Laumann, John H.

    Gagnon, Robert T. Michael andStuart Michaels. University of

    Chicago Press, 2000.

    The Gay and Lesbian Atlas.Gary J. Gates and Jason Ost.Urban Institute Press, 2004.

    FURTHERREADING

    The 10 counties with the largestnumbers of gays and lesbians:

    1. Los Angeles

    2. Cook, Illinois (Chicago)

    3. New York (Manhattan)

    4. San Francisco

    5. Harris, Texas (Houston)

    6. San Diego

    7. Dallas

    8. Maricopa, Arizona (Phoenix)9. King, Washington (Seattle)

    10. Broward, Florida(Ft. Lauderdale)

    The 10 counties with the highestproportion of gays and lesbians:

    1. San Francisco

    2. District of Columbia

    3. DeKalb, Georgia (Atlanta area)

    4. New York

    5. Suffolk, Massachusetts

    (Boston)6. Denver

    7. Multnomah, Oregon (Portland)

    8.Alame da, Califo rnia (Oak land)

    9. King, Washington (Seattle)

    10. Fulton, Georgia (Atlanta)

    SO UR CE : U .S . D ec en ni al Ce ns us , 2 00 0

    SAME-SEXLOCATIONS

    U.S. Counties Classified by Proportion of Gay or Lesbian HouseholdsLowest quintile Three middle quintiles Highest quintile

    SOURCE: U.S. Decennial Census, 2000

    COPYRIGHT 2005 SCIENTIFIC AMERICAN, INC.