Census Database and Retrieval Tools






American Community Survey

​​The American Community Survey (ACS) is an ongoing, nationwide, monthly survey covering approximately three-million households each year and is now the source for all socioeconomic data. Data that were collected by the 10-year Census in what was known as its long-form questionnaire. Following Census 2000, this detailed information is captured by the ACS. ACS data are available for three types of releases depending on population size: annual, three-year, and five-year periods. (Note: 3-year ACS Estimates were discontinued following the release of the 2009-2012 ACS Estimates). Annual ACS data are avaiable for all geographies (U.S., states, counties, and places)with a minimum population of 65,000. The 5-year ACS estimates have no population size restriction; these estimates are available for all geographies down to census tracts and block groups.

The ACS 5-year Estimates are described as a composite of 5 years (60 months) of data. 

Data and Reports

Comparing ACS Data to Census and to Other ACS Data

Cautions, Documentation and Guidelines on Using ACS Data

ACS Annual Data (population of 65,000 or more for all geographies) :
   2021 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014  | 2013  | 2012  | 2011  | 2010  | 2009  | 2008  | 2007  | 2006  | 2005  | 2004  | 2003  | 2002

ACS Three-year Data (population of 20,000 or more for all geographies) :
Note: The Census Bureau has discontinued the three-year ACS data. The last three-year data release was for the 2011-2013 period. There will be no more three-year data releases.

2011-2013  | 2010-2012  | 2009-2011  | 2008-2010  | 2007-2009  | 2006-2008  | 2005-2007​

Socioeconomic Characteristics for Maryland's Jurisdictions and Places:

ACS Five-year Data (data available for all geographies down to census tracts & block groups) :

Socioeconomic Characteristics for Maryland's Legislative Districts :

Voting Age Population in Maryland :


2010-2014 Download Shape file and MXD for Map Application with Coefficient of Variation : 
Attributes | Zip Code Tabulation Areas (ZCTA) | Census Tract

County to County Migration Data:
1. ACS 2016-2020   (05/23)
2. ACS 2015-2019   (06/22​​​​)
3. ACS 2012-2016   (08/19)
4. ACS 2011-2015 With Demographic Characteristics (03/19)
5. ACS 2010-2014 With Household Type, Housing Tenure & Relationship to Householder (10/17)
6. ACS 2009-2013 With Ability to Speak English, Place of Birth & Years in the U.S. (10/15)
7. ACS 2008-2012 With Employment, Occupation & Work Status Profiles (9/14)
8. ACS 2007-2011 With Education & Income Profile (3/14)
9. 2006-2010 Daytime Population
10. ACS 2011 to 2015 Commutation Data | ACS 2011 to 2015 Commutation Map
11. ACS 2009 to 2013 Commutation Data | ACS 2009 to 2013 Commutation Map
12. ACS 2006 to 2010 Commutation Data | ACS 2006 to 2010 Commutation Map
13. Commutation 2000

2006-2010 Equal Employment Opportunity (EEO) Report by Sex, Race & Ethnic Origin :

Number By Maryland and It's Jurisdictions :
State of Maryland
Percent By Maryland and It's Jurisdictions :
State of Maryland

Raw Data - Detailed Occupation by Sex & Race/Ethnicity for Residence Geography: 
State of Maryland | Maryland's Jurisdictions
State of Maryland


Calculations of Statistical Significance & MOEs of Combinations of ACS Data

Spreadsheet for Calculating Margins of Error and Statistical Significance for Sums, Proportions and Ratios

Note: Calculations include "Significance test for Difference between two Estimates", "Calculate the Standard Error of the Difference or Sum of Two Estimates", "Calculate the Standard Error of Sum of More Than Two Estimates", "Calculate the Standard Error of a Proportion" and "Calculate the Standard Error of a Ratio"


Human Trafficking GET HELP

National Human Trafficking Hotline - 24/7 Confidential

1-888-373-7888 233733 More Information on human trafficking in Maryland

Customer Service Promise

The State of Maryland pledges to provide constituents, businesses, customers, and stakeholders with friendly and courteous, timely and responsive, accurate and consistent, accessible and convenient, and truthful and transparent services.

Take Our Survey

Help Stop Fraud in State Government

The Maryland General Assembly’s Office of Legislative Audits operates a toll-free fraud hotline to receive allegations of fraud and/or abuse of State government resources. Information reported to the hotline in the past has helped to eliminate certain fraudulent activities and protect State resources.

More Information