The United States Census Bureau is a bureau of the US Department of Commerce. The major functions of the Census Bureau are authorized by Article 2, Section 2 of the United States Constitution, which provides that a census of population shall be taken every 10 years, and by Title 13 and Title 26 of the United States Code of Federal Regulations.
The Census Bureau is responsible for numerous statistical programs, including census and surveys of households, governments, manufacturing and industries, and for US foreign trade statistics. The first US census was conducted in 1790 for the purposes of apportioning state representation in the US House of Representatives and for the apportionment of taxes.
Presents an estimate of the median income of households in the United States in the 12 months prior to when the survey was completed, segmented by household size. Estimates are reported for the population in total and for race/ethnic groups, for specified geographic areas. Household income includes the income of the householder and all other individuals 15 years old and over in the household, whether they are related to the householder or not. The median divides the income distribution into two equal parts, with one-half of the cases falling below the median income and one-half above the median. For households and families, the median income is based on the distribution of the total number of households and families including those with no income. Values are inflation adjusted to the reference year using the Consumer Price Index.
The American Community Survey (ACS) conducted by the US Census Bureau provides estimates of the characteristics of the population over a specific time period. The ACS collects data from the 50 states, Washington, DC, and Puerto Rico, where it is called the Puerto Rico Community Survey. It is a continuous survey, in which each month a sample of housing unit addresses receives a questionnaire, with approximately 3.5 million addresses surveyed each year. Each year the survey produces data pooled to produce 1-year, 3-year, and 5-year estimates for geographic areas in the US and Puerto Rico, ranging from neighborhoods to congressional districts to the entire nation. Data for each release of the 5-year estimates were collected over a 5-year period ending December 31 of the reference year (eg, data in the 2018 5-year estimates were collected January 1, 2014 - December 31, 2018). The statistics reported represent the characteristics of the population for the entire period vs a specific year within that period. The 5-year estimates are published for areas with populations of all sizes and are the most reliable and precise of the ACS period estimates as well as the most comprehensive, albeit the least current. (The 1-year and 3-year estimates provide data on areas with populations of 65,000+ and 20,000+, respectively. Note that the ACS 3-year estimates were discontinued with the 2011-2013 release.) The ACS estimates provide information about the social and economic needs of communities and are used to help determine how billions in federal and state funds are distributed each year. It is conducted under the authority of Title 13, United States Code, Sections 141 and 193.
Data Planet publishes the ACS base tables designated with a “B,” which provide the most detailed estimates on all topics and for all geographies. (The Census Bureau also publishes "C" tables released as Comparison Profiles, “D” tables released as Data Profiles, and “S,” or Summary, tables.) Certain of the tables are repeated by nine race and/or Hispanic or Latino groups, identified by the Census Bureau with a suffix (A-I) that pertains to a specific race/ethnic group. For detailed information on code lists, subject definitions, data accuracy, statistical testing, and sampling methodology and error, please see the technical documentation. Note that statistics presented as dollars refer to inflation-adjusted dollars of the survey release year. With the 2014-2018 release of the ACS, tables using industry and occupation classifications have been updated to align with the 2017 North American Industrial Classification System and 2018 Standard Occupational Classification (SOC) codes, respectively. Data Planet published Census-provided margin of error (MOE) values for estimates and should be interpreted as a +/-[value]. These values reflect the variation in the estimates over all possible samples that could have been selected from the population using the same sampling methodology and should be taken into account in analyses of the data. For more detail on MOEs, please see https://www2.census.gov/programs-surveys/acs/tech_docs/accuracy/MultiyearACSAccuracyofData2018.pdf?# .
Also see About the ACS 5-Year Estimates at https://data-planet.libguides.com/ACS.
United States Census Bureau (2020). American Community Survey Summary File: 5-Year Estimates, 2014-2018: B19019. Median Household Income in the Past 12 Months by Household Size | Demographic Indicator: 3-Person Households, 2018. Data Planet™ Statistical Datasets: A SAGE Publishing Resource. (Dataset). Dataset-ID: 001-068-263. https://doi.org/10.6068/DP17373835A0E42