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ZIP Code Demographics by Congressional District
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Census 2010 data provide a way to examine ZIP Code demographics by congressional district. Many ZIP codes transcend congressional district boundaries; ZIP codes may exist in more than one congressional district. Use data described in this section to view/analyze characteristics of ZIP code areas that intersect with congressional districts of interest. See which congressional districts are served by a specific ZIP code and associated demographics. See this example showing a map and tabular data depiction.

Sort the ranking table below on population in descending order to see that the Congressional District/ZIP code areas with the largest population include TX16/79936 (111,086), NY05/11368 (107,893) and CA38/90650 (105,549).

ZIP Codes & 113th Congressional Districts Update (10/22/12)
These national scope data are now available:
    > 113th Congressional District (CD) boundaries in shapefile structure.
    > Corresponding state upper (SU) and lower (SL) house boundary shapefiles.
    > Census 2010 census block to 113th CD, SU and SL equivalence files.
    > ProximityOne Census 2010 demographics data by 113th CD, SU and SL.
    > ProximityOne ZIP Code-113th CD, SU and SL equivalence file and demographics.
Contact us (888-364-7656) for mapping, GIS projects, data integration and analysis.

Census 2010 ZIP Code Tabulation Areas (ZCTAs) and congressional districts are both comprised of sets of census blocks. Census block level data from the Census 2010 Summary File 1 (SF1) have been aggregated into ZIP code-Congressional District parts to develop data presented in the ranking table. Data in the ranking table are part of the ProximityOne national ZIP Code-Congressional District dataset. See additional details.

Use the ranking table to view a congressional district by ZIP code and selected associated demographics for each ZIP code portion in that congressional district. Examine how split ZIP codes are split by specific congressional districts.

ZIP Code Demographics by 112th Congressional District - Interactive Ranking Table
  See ranking table usage notes below ranking table. See related ranking tables --
  All data based on Census 2010 Summary File 1. See column header descriptions below table.
  Click ShowAll button between Find/Queries.

Using the Ranking Table
  • Click on a column header to sort on that column; click column header again to sort in other direction.
  • Click ShowAll button to show all tabulation areas and restore full set of data view.
  • Click State to select on geographies in a selected state (click ShowAll between selections).
  • Click SumLev to select a type of geography (click ShowAll between selections).
  • CD Query -- key in STCD in text box to right of Find-in-CD button then click button to locate all matches.
      - case sensitive; click ShowAll button between queries.
  • ZIP Code Query -- key in ZIP code in text box to right of Find-in-ZIP button then click button to locate all matches.
      - ZIP code must be FIPS 5 digit code, lead zero as applicable); click ShowAll button between queries.

See further application/use examples below map section further down on this page.

Column Headers
  • STCD -- State Abbreviation + Congressional District
  • ZIP -- Census 2010-based ZIP Code Tabulation Area
  Census 2010 SF1-sourced population aggregated from census blocks:
  • Population
  • Housing
  • %White A - Percent Population White alone (P0030002)
  • %Black A - Percent Population Black or African American alone (P0030003)
  • %AI/AN A - Percent Population American Indian and Alaska Native alone (P0030004)
  • %Asian A - Percent Population Asian alone (P0030005)
  • %NHOPI A - Percent Population Native Hawaiian and Other Pacific Islander alone (P0030006)
  • %OthRace A - Percent Population Some Other Race alone (P0030007)
  • %2+Races - Percent Population Two or More Races (P0030008)
  • %Hispanic - Percent Population Hispanic or Latino (P0040003)
  -- percents are percentages of total population in this ZCTA

Mapping ZIP Code-Congressional District Areas
The following view shows the Dallas County, TX area. The map shows patterns of Census 2010 rental vacancy rate by ZIP Code (see in legend at left) with ZIP code labels. Congressional District (111/112) boundaries are shown with bold green boundary and white CD labels. The pointer/hand is shown in ZIP code 75137 (Duncanville, TX). Using the ranking table above, it is possible to view demographics for the parts of the ZIP code area within the Congressional Districts 24 and 30. See the next graphic.

The following static view of the ranking table above is focused on the same ZIP/area. To develop this view, click ShowAll, Find ZIP with 75137 in the edit box. The total Census 2010 population for ZIP 75137 was 18,861 (13,054 + 5,807). The same method of examining city/place by ZIP code area part can be applied to any area of the U.S.
Find which CD(s) include a ZIP Code of interest.
-- Click ShowAll. Click Find ZIP with 75137 (use your ZIP of interest) in the edit box.
    ... this locates/shows CD(s) that intersect with this ZIP.
What are the demographic characteristics of each ZIP Code part intersecting with a CD?
-- Click ShowAll. Click Find CD with TX24 (use your CD of interest) in the edit box.
    ... this locates/shows all ZIPs partly/wholly in the selected CD. How do ZIP codes rank by demographic characteristic within a specific CD?
-- From the view of TX24 (use your CD) intersecting ZIPs, click a column header to sort on a column/subject of interest.
    ... the view refreshes; click same header again for other direction; choose another item and repeat.

ZIP Code Tabulation Areas
Data presented in the ranking table sum to the total population/housing units for the corresponding state. The demographic characteristics for each census block in each state are aggregated into a ZIP-Congressional District combination.

There are many instances of ZIP-Place combinations that show zero or nearly zero population. These areas are often geographic slivers, almost lines.

While congressional district boundaries cover the U.S. wall-to-wall, Census 2010 ZIP Code Tabulation Areas are comprised of populated census blocks and do not cover the the U.S. wall-to-wall from a geographic perspective.

ZIP Code Equivalence Files
The following 2010 ZIP Code (ZCTA) equivalence/relationship files are available. Contact us for details (888-364-7656).
  • ZIP to County
  • ZIP to County Subdivision
  • ZIP to Place
  • ZIP to Census Tract
  • ZIP to Congressional District
  • ZIP to Metropolitan and Micropolitan Statistical Areas

Additional Information
Proximity develops geographic-demographic-economic data and analytical tools and helps organizations knit together and use diverse data in a decision-making and analytical framework. We develop custom demographic/economic estimates and projections, develop geographic and geocoded address files, and assist with impact and geospatial analyses. Wide-ranging organizations use our tools (software, data, methodologies) to analyze their own data integrated with other data.

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