Data and methodology
Data are compiled using the US Census Bureau’s state-level preferred estimates for same-sex couples. Same-sex couples are identified in households where Person 1 describes his or her relationship with another adult of the same sex as either a “husband/wife” or “unmarried partner”. The Census Bureau preferred estimates to adjust original Census tabulations reported in the Census 2010 SF-1, PCT15 to account for the likelihood that a small portion of different-sex couples miscode the sex of a spouse or partner and are incorrectly counted as a same-sex couple.
The Census Bureau only released preferred estimates for states. County and city data used in this report are adjusted by the authors and do not represent official Census Bureau tabulations. Like the Census Bureau preferred estimates, the adjustment procedure accounts for the likelihood that a small portion of different-sex couples miscode the sex of a spouse or partner and are incorrectly counted as a same-sex couple. Note that the adjusted figures do not take into account the possibility that some same-sex couples may not be counted in Census tabulations due to concerns about confidentiality or because neither partner was Person 1 in the household.