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About Census Data

American Community Survey (ACS)

The American Community Survey (ACS) is an ongoing survey that provides data every year -- giving communities the current information they need to plan investments and services. Information from the survey generates data that help determine how more than $400 billion in federal and state funds are distributed each year.

American Community Survey (ACS) - Read More…

Boundary and Annexation Survey (BAS)

Accurate boundaries are essential for accurate population counts. Every year the Census Bureau's Boundary and Annexation Survey (BAS) updates the nation's inventory of counties, townships, and incorporated places.

Boundary and Annexation Survey (BAS) - Read More…

Census Challenges

Governmental units may challenge the U.S. Census Bureau's population estimates and counts.

Census Challenges - Read More…

Census of Agriculture

Every five years the census of agriculture provides comprehensive statistics about agricultural operations, production, operators, and land use.

Census of Agriculture - Read More…

Census Tracts

Census tracts are small, relatively permanent statistical subdivisions of counties. Web look-up tools let you find census tract numbers for specific street addresses.

Census Tracts - Read More…

Certified Census Counts

Population counts used for official purposes must be certified by the U.S. Census Bureau and the Iowa Secretary of State.

Certified Census Counts - Read More…

New, Consolidated and Discontinued Cities

New, merged, and discontinued Iowa cities

New, Consolidated and Discontinued Cities - Read More…

Congressional Apportionment

Apportionment is the process of dividing up the 435 seats in the House of Representatives among the 50 states according to population.

Congressional Apportionment - Read More…

Disclosure Avoidance and Differential Privacy

The Census Bureau has a long history of innovations in statistical protection. With each advance in data science they've applied better and stronger protections to keep the statistics we release anonymous.

Disclosure Avoidance and Differential Privacy - Read More…

Economic Census Programs

Every five years the Census Bureau's economic census provides comprehensive statistics about the structure and functioning of the nation's economy.

Economic Census Programs - Read More…

Health Insurance Estimates

The Census Bureau produces annual estimates of health insurance coverage for the U.S. , states, and counties.

Health Insurance Estimates - Read More…

Metropolitan, Micropolitan, and Combined Statistical Areas

Every ten years the U.S. Office of Management and Budget (OMB) updates the standards for defining metropolitan areas. A list of qualified metropolitan, micropolitan, and combined statistical areas is released by OMB every year based on new population estimates.

Metropolitan, Micropolitan, and Combined Statistical Areas - Read More…

North American Industry Classification System (NAICS)

NAICS is a system for classifying business establishments by type of economic activity to promote uniformity and comparability in the presentation and analysis of statistical data about the economy.

North American Industry Classification System (NAICS) - Read More…

Population Estimates

Every year the Census Bureau produces population estimates for states, counties, and incorporated places.

Population Estimates - Read More…

Population Projections

Every ten years the Census Bureau produces population projections for states. The State Data Center also uses annual state and county projections produced by Woods & Poole Economics, Inc.

Population Projections - Read More…

Poverty Statistics, Thresholds, and Guidelines

Every year the Census Bureau produces poverty estimates for states, counties, and school districts.

Poverty Statistics, Thresholds, and Guidelines - Read More…

Race and Ethnicity Classifications

Race and ethnicity standards provide consistent and comparable data for an array of statistical and administrative programs, including census programs.

Race and Ethnicity Classifications - Read More…

Redistricting Data Program and Iowa Redistricting

Small-area census population counts are used in Iowa to draw new boundaries for precincts and for congressional, legislative, supervisor, ward, and school board director districts.

Redistricting Data Program and Iowa Redistricting - Read More…

Special Censuses

Local governments may ask the Census Bureau to conduct a special census in the years between decennial censuses. The certified results of a special census may be used to allocate state funds based on population.

Special Censuses - Read More…

Urban and Rural Classifications

The Census Bureau uses urban area criteria to create a single set of rules that yield consistent data and eliminate subjectivity in the delineation of urban areas.

Urban and Rural Classifications - Read More…

What Is The Census?

The U.S. Constitution mandates a census every ten years to determine how many seats each state will have in the U.S. House of Representatives.

What Is The Census? - Read More…

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