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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 of the socioeconomic data that was formerly obtained from the decennial census. ACS data is available for three types of releases depending on population size: annually, three-year periods and five-year periods.

Annual ACS data are available for all geographies (e.g., U.S., states, counties, municipalities, places) with a population of 65,000 or more.

Three-year period ACS estimates are available for all geographies with a population of 20,000 or more.

Five-year period ACS estimates are available for all geographies down to census tracts and block groups.


Data and Reports

Comparing ACS Data to Census and to Other ACS Data

Cautions, Documentation and Guidelines on Using ACS Data

ACS Annual Data :
2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002


ACS Three-year Data :
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 :
2008-2012 | 2007-2011 | 2006-2010 | 2005-2009

2008-2012 Socioeconomic Characteristics for Maryland's Legislative Districts
2008-2012 Voting Age Population in Maryland

Download Geodatabase and MXD for Map Application of 2008-2012 with Coefficient of Variation : Zip Code Tabulation Areas (ZCTA) | Census Tract
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2007-2011 Popular Tables for Maryland's Jurisdictions and Census Tracts
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County to County Migration Data :
1. ACS 2008 to 2012 Migration Data (9/14)
2. ACS 2007 to 2011 Migration Data (3/14)
3. ACS 2006 to 2010 Migration Data (4/13)
4. Census 2000 Migration Data
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2006-2010 Daytime Population

ACS 2006 to 2010 Commutation Data | ACS 2006 to 2010 Commutation Map | Census 2000 Commutation Data

2006-2010 Equal Employment Opportunity (EEO) Report by Sex, Race & Ethnic Origin :
  • Number By Maryland and It's Jurisdictions :
  • Percent By Maryland and It's Jurisdictions :
  • Raw Data - Detailed Occupation by Sex & Race/Ethnicity for Residence Geography :
    State of Maryland | Maryland's Jurisdictions
  • Crosswalk of EEO 2000 Occupations to EEO 2006-2010 Occupations
  • Go To Census Bureau Web Site for More Data
  • Census 2000 Equal Employment Opportunity (EEO) Reports
    • By Numbers :
    • By Percents :
2006-2010 Selected Characteristics for Inside/Outside Priority Funding Areas (PFAs)

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"


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