The United States Census Bureau conducts the decennial census survey every ten years as mandated by the U.S. Constitution. The most recent census was conducted in April 2010. During each decennial census, the Census Bureau collects data from every household in the U.S. and its territories. EpiQuery provides data for New York City from the national census in two modules: EQ Census 1990-2000 and EQ Census 2010 [available soon]. To download data directly from the U.S. Census Bureau, visit American Factfinder.
EpiQuery allows users to acquire NYC census information from 1990 to 2000 and from 2010. Users can choose one of three geographies (citywide, borough, or neighborhood) and can stratify results by up to three demographic variables (sex, race or age group.) The EpiQuery Census Modules aim to provide researchers with easily accessible New York City denominator information for the calculation of rates for New York City residents.
1990 Census Data
The 1990 data in the EpiQuery Census 1990-2000 Module come from the Census Summary Tape File 1 (STF 1) for all subgroups, except for neighborhood population numbers. Neighborhood-level data come from the Census Summary Tape File 3 (STF 3). It is not possible to obtain racial/ethnic Census data by zip code for 1990.
2000 Census Data
The 2000 data in the EpiQuery Census 1990-2000 Module are from the Census Summary File 1 (SF 1).
2010 Census Data
The 2010 data in the EpiQuery Census 2010 Module [available soon] are from the Census Summary File 1 (SF 1).
1991-1999 Population Estimates
Since the U.S. Census is only conducted every ten years, the EpiQuery Census Module provides estimates from 1991 to 1999 using linear interpolation methodology. Linear interpolation assumes that the population increased or decreased at the same rate each year.
The U.S. Census Bureau changed the way it collected race and ethnicity information for the 2000 Census, making the racial/ethnic categories different from the 1990 Census. Specifically, in 2000 for the first time, respondents could choose more than one racial category, creating "multiple race" categories. In addition, in 1990 there was one category for "Asian or Pacific Islander," but in 2000 there were separate categories for "Asian" and "Native Hawaiian or Pacific Islander." In order to create 2000 racial/ethnic categories similar to those in 1990 for the interpolation of 1991-1999 estimates and comparison purposes, Asian and Pacific Islander categories were grouped together into one category, and all respondents who reported two or more non-Hispanic racial categories were included in the "Other race" category. Due to changes in data collection, caution should be used in interpreting trends by race/ethnicity between 1990 and 2000. For more information on how the Census collects race/ethnicity information, visit U.S. Census Bureau: Race Data.
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