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GIS Library Contents - Metadata

ZIP Codes - Polygons

Layer Thumbnail Map

This metadata information is subject to our disclaimer. Metadata information presented here is maintained manually. Therefore, date-sensitive fields such as date of last update may not be up-to-date. All metadata is subject to errors inherent in a manual process.


Descriptive nameZIP Codes - Polygons
File namezip
Spatial domainPima County
Abstractzip displays ZIP Code areas.
The USPS does not recognize zip polygons. Zip codes with the USPS are arranged by mail carrier route and are linear.
Zip code polygons are drawn using the collective zip codes in adparcel with the boundary following parcels from paregion. Currently (6/2022) we are not including addresses that are unique (high volume of mail to 1 address, such as PCC) or post office boxes.
To verify addresses please use the USPS website "Look Up a ZIP Code" at https://tools.usps.com/zip-code-lookup.htm See more information.
Known errors/qualificationsMetropolitan boundaries are delineated well. Rural boundaries are extrapolated in some areas. Refer to US Postal Service for latest ZIP Code routes and for exact individual addresses. Zip codes defined by the US Postal Service as "unique", "military", and "post office box" are not included in this layer as they have no defined are

10/2013: While this layer is maintained as a feature class in gdbmaint, the coverage format is still required for certain nightly processing. See Steve Whitney.
Feature typepolygon
Feature count 54
Thumbnail Map zip.pdf PDF file format   (484,916 bytes, PDF created 01/25/2024 )
ProjectionNAD83 HPGN (Parameters)
Rectificationparcel
Field/value metadata Field metadata
Source organizationPima County
Source contact
Source document or file namehttp://new.usps.com
Source date2000
Source scale
Source formatPaper
Date of last data update
(This date may not be current.)
20240125
Last data update byChad Barnett
Date/time last touched - Meaning? 2024-01-24  06:01 PM - Enterprise GDB - Library input format
  2024-01-24  06:48 PM - Shapefile
  See coverage files, if any, for date.
LineageModified 85704 and 85718 zip code polygons as per USPS records requested by Matt from Tucson Water.
Modified 85641 based on boundary of Coyote Creek Lots 1-395.
Added 85756 zip code based on KOLD on-line news story, 7/1/08.
Modified 85718 boundary per anonymous mapguide printout from City, 5/14/09.
Modified 85756/85706 boundary using USPS lookup from parcel layer, 5/19/09.
Added 85622 based on Green Valley news article and zip+4 lookup, 8/17/09.
Removed 85744 based on zip+4 lookup and it was a single business "unique" zip code for IBM.
Modified 85629 based on zip+4 notified by Michelene, 4/22/14. Modified boundary of 85742 and 85737 per Irene Swanson 9/2/14. Modified 85653 as per Robin Freiman 9/11/14. Modified 85704 as per Robin Freiman, 10/31/14. Modified 85658 as per Jennifer Patterson (recorders office) 9/10/15. Modified 85641 as per Michelene 4/8/16. Modified 85741 per Robin 1/13/17. Modified 85755 1/27/17 per Robin. 10/25/17 Modified 85341 and 85321 per Robin. Modify 85653 per Marana.
4/19/21 Modified 85629,85756 and 85641 per Nicholas Jordan.

All boundaries updated 6/2022 using adparcel and paregion by Rob Hastings.
All boundaries updated 1/2024 using adparcel and paregion by Chad Barnett.
On maintenance?No
Maintenance organizationPC ITD GIS
Maintenance description
Original conversion byTim Eubanks
Pima County ITD GIS contactSteve Whitney
Alternate Pima County ITD GIS contacte-mail address
On  Pima County Geospatial Data Portal? Yes

See Metadata Field Descriptions.
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