Geographic Tools

The following links contain codes and detailed components of each type of area.

We have produced electronic boundary files for the most commonly used areas.

2000 samples, 2005 ACS and 2006 ACS

• Public Use Microdata Areas for 2000, 2005 and 2006 (includes boundary files)
• Public Use Microdata Areas for migration variables
• Public Use Microdata Areas for place of work variables
• Consistent PUMAs (includes boundary files)

1990 samples

• 5% State and 1% Metro samples: Public Use Microdata Areas for 1990 (includes boundary files)

• Elderly sample: Planning Service Areas
• Labor Market Areas sample: Labor Market Areas and Commuting Zones
• Consistent PUMAs (includes boundary files)

1970-1980 samples

• 1980 Samples: County Groups (includes boundary files)
• 1980 Labor Market Areas sample: Labor Market Areas and Commuting Zones
• 1970 Metro samples: County Groups (includes boundary files)
• Consistent PUMAs (includes boundary files)

Pre-1970 samples

• Minor Civil Divisions/Incorporated Municipalities
• Counties (includes boundary files)
• State Economic Areas (includes boundary files)
• Changing definitions of states and territories
• Municipios (Puerto Rico)
• Pueblos (Puerto Rico)

Metropolitan areas, available in all years

• 1980-2006: Incompletely identified metropolitan areas
• 1900-2006: Components of metropolitan areas that existed in 2000
• 1850-2006: Components of metropolitan areas that existed in 1900