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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
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.