Introducing a new way to navigate by topics. Access the latest news, data, publications and more around topics of interest.
Our population statistics cover age, sex, race, Hispanic origin, migration, ancestry, language use, veterans, as well as population estimates and projections.
This section provides information on a range of educational topics, from educational attainment and school enrollment to school districts, costs and financing.
We measure the state of the nations workforce, including employment and unemployment levels, weeks and hours worked, occupations, and commuting.
Our statistics highlight trends in household and family composition, describe characteristics of the residents of housing units, and show how they are related.
Health statistics on insurance coverage, disability, fertility and other health issues are increasingly important in measuring the nation's overall well-being.
We measure the housing and construction industry, track homeownership rates, and produce statistics on the physical and financial characteristics of our homes.
The U.S. Census Bureau is the official source for U.S. export and import statistics and regulations governing the reporting of exports from the U.S.
The U.S. Census Bureau provides data for the Federal, state and local governments as well as voting, redistricting, apportionment and congressional affairs.
Search an alphabetical index of keywords and phrases to access Census Bureau statistics, publications, products, services, data, and data tools.
Geography provides the framework for Census Bureau survey design, sample selection, data collection, tabulation, and dissemination.
Geography is central to the work of the Bureau, providing the framework for survey design, sample selection, data collection, tabulation, and dissemination.
Find resources on how to use geographic data and products with statistical data, educational blog postings, and presentations.
The Geographic Support System Initiative will integrate improved address coverage, spatial feature updates, and enhanced quality assessment and measurement.
Work with interactive mapping tools from across the Census Bureau.
Find geographic data and products such as Shapefiles, KMLs, TIGERweb, boundary files, geographic relationship files, and reference and thematic maps.
Metropolitan and micropolitan areas are geographic entities used by Federal statistical agencies in collecting, tabulating, and publishing Federal statistics.
Find information about specific partnership programs and learn more about our partnerships with other organizations.
Definitions of geographic terms, why geographic areas are defined, and how the Census Bureau defines geographic areas.
We conduct research on geographic topics such as how to define geographic areas and how geography changes over time.
Visit our library of Census Bureau multimedia files. Collection formats include audio, video, mobile apps, images, and publications.
Collection of audio features and sound bites.
The Census Bureau packages data and information into easy-to-understand visuals.
Browse Census Bureau images.
Read briefs and reports from Census Bureau experts.
Watch Census Bureau vignettes, testimonials, and video files.
Read research analyses from Census Bureau experts.
Access data through products and tools including data visualizations, mobile apps, interactive web apps and other software.
Developer portal to access services and documentation for the Census Bureau's APIs.
Explore Census Bureau data on your mobile device with interactive tools.
Find a multitude of DVDs, CDs and publications in print by topic.
These external sites provide more data.
Download extraction tools to help you get the in-depth data you need.
Learn more about our data from this collection of e-tutorials, presentations, webinars and other training materials. Sign up for training sessions.
Explore Census data with interactive visualizations covering a broad range of topics.
Learn how we serve the public as the most reliable source of data about the nation's people and economy.
How we provide the best mix of timeliness, relevancy, quality, and cost for the data we collect.
Our researchers explore innovative ways to conduct surveys, increase respondent participation, reduce costs, and improve accuracy.
Our surveys provide periodic and comprehensive statistics about the nation, critical for government programs, policies, and decisionmaking.
Learn about other opportunities to collaborate with us.
Explore the rich historical background of an organization with roots almost as old as the nation.
Explore prospective positions available at the Census Bureau.
Information about the current field vacancies available at the U.S. Census Bureau Regional Offices.
Discover the latest in Census Bureau data releases, reports, and events.
The Census Bureau's Director writes on how we measure America's people, places and economy.
Find interesting and quirky statistics regarding national celebrations and major events.
Listen to audio files on fun facts, historical figures, and celebrations of the month.
Find media toolkits, advisories, and all the latest Census news.
See what's coming up in releases and reports.
The Geographic Change Notes provide an online resource for selected geographic changes to incorporated places, census designated places, county subdivisions, counties and equivalent areas, and American Indian, Alaska Native, and Native Hawaiian areas as recognized by the U.S. Census Bureau, within the 50 States, the District of Columbia, Puerto Rico, and the Island Areas (American Samoa, Guam, the Commonwealth of the Northern Mariana Islands, and the U.S. Virgin Islands). Note that most of the census designated places (CDPs) newly defined for the 2010 Census and changes affecting the 2010 CDPs are not included in the change notes. Use the Geographic Comparability File - 2010 to 2000 Places to determine changes affecting 2010 CDPs.
For a list of updates processed through January 1, 2013, please select a state or territory from the menu below. More information about the Geographic Boundary Change Notes can be found in the sections beneath the menu.
Types of changes found on this website include:
Change records (except for American Indian, Alaska Native, and Native Hawaiian areas) are listed in alphabetical sequence by entity name within each state. Each entity has a unique code combination. In addition to the state and entity codes, the record for each entity contains several related items of information for that entity and the change affecting it.
County and Equivalent Area
Each county is assigned a 3-digit code that is unique within state. These codes are assigned alphabetically starting with 001 (except in South Dakota, where code 001 is reserved for the former Armstrong County). For example, Autauga County, Alabama, is assigned a code of 001 in the Alabama file; Montgomery County, Maryland, is assigned a code of 031 in the Maryland file.
The independent cities of Baltimore, Maryland; St. Louis, Missouri; Carson City, Nevada; and the 39 independent cities in Virginia are independent of any county and, thus, constitute primary divisions of their states. As such, independent cities are treated as county equivalents. Codes for the independent cities are assigned alphabetically beginning at 500. Data shown for the independent city at the place and county subdivision level are identical to the data for its county equivalent.
County Subdivision Area
Each county subdivision is assigned a 5-digit Federal Information Processing Series (FIPS) code. For example, Alamo, in Montgomery County, Arkansas is assigned code 90013.
Incorporated Place, Consolidated City, and Census Designated Place (Entity Type = P)
Each place is assigned a 5-digit Federal Information Processing Series (FIPS) code. For example, Munford city, Tennessee is assigned code 51540.
In some states, places are independent (an independent place) of any surrounding county subdivision and each county-part is treated as a separate county subdivision. This is true for all incorporated places in the District of Columbia, Maine, Massachusetts, New Hampshire, New Jersey, North Dakota, Pennsylvania, Rhode Island, South Dakota, and Wisconsin and some incorporated places in 14 additional states. In these cases, the name and codes for the county subdivision match that for the incorporated place. For example, Chicago city, Illinois, is independent of any surrounding township and is shown as two county subdivisions named Chicago city with the same codes in Cook and DuPage counties.
Information provided for each entity includes: state FIPS code; area name; FIPS codes; name and code of each county in which the entity is located (applies only to place and county subdivisions); type of change that occurred, the legal effective date of change; the legal effective year of change; the legal effective month of change; the legal effective day of change; detailed description of the change; the source from which the information was obtained, and the date the change was submitted to the Census Bureau's geographic change note database. Note: Neither the effective date nor the submittal date can be used to always determine when a change was applied to the geographic database or to determine the yearly product first showing the change.
The files are first sequenced in numerical order based on the FIPS state codes; that is, the states and the District of Columbia occur first in numeric sequence, followed by Puerto Rico and the Outlying Areas. Within state, the files are sequenced alphabetically by entity name.
To download an ASCII file, click the link "Download a pipe-delimited text version of the Geographic Change Notes".
Description of Fields:
Field 1 (STATE):
Identifies the state or equivalent area FIPS code.
Field 2 (ENTITY NAME):
Identifies the name and description of the entity of change. If the entity is not a county or equivalent area, the county name and code is listed in the parenthesis.
Field 3 (ENTITY CODES):
Identifies the individual FIPS entity codes for the affected entity. For American Indian, Alaska Native, and Native Hawaiian areas, the census code is used.
Field 4 (TYPE OF CHANGE):
Summarizes the type of change affecting the entity.
Field 5 (EFFECTIVE DATE):
Identifies the legal or functional effective date of change for the entity. If the change is a correction, no effective date may be entered; the effective date can be assumed to be as of January 1 of the year of the submission date.
Field 6 (EFFECTIVE YEAR):
The effective date year parsed from the effective date field.
Field 7 (EFFECTIVE MONTH):
The effective date month parsed from the effective date field.
Field 8 (EFFECTIVE DAY):
The effective date day parsed from the effective date field.
Field 9 (DESCRIPTION OF CHANGE):
Provides a more detailed description of the type of change involved and the entities affected (when applicable).
Field 10 (SOURCE):
Identifies the source of the change. Geographic changes are obtained through various Census Bureau programs, such as the annual Boundary and Annexation Survey (BAS), the Geographically Updated Population Certification Program (GUPCP), and the Participant Statistical Areas Program (PSAP). Changes also are made based on information provided directly to, or obtained by, staff in the Geographic Standards and Criteria Branch (GSCB) of the Geography Division.
Field 11 (DATE SUBMITTED):
Identifies the date the change was added to the Geographic Change Note file. This date always lags behind the date the change was actually applied to the Census Bureauís geographic database.
Also available are the Geography Notes and Errata from the 2010 Census [PDF]. This document contains notes on changes to Boundary and Geographic Relationships, Names and Legal/Statistical Areas, FIPS Codes, FIPS Class Codes, and ANSI Codes to correct errors discovered after the 2010 Census.