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Missoula County GIS Deparment
(406) 258-3275
Missoula County Seal and image of areas around the City.

Missoula County GIS Department

Missoula County GIS Department
Good Afternoon from Missoula, Montana where it is Sunday, April 20, 2014
Current Time: 12:24 PM

GIS Department - FAQs

Map Server Frequently Asked Questions (FAQs)

Is there somewhere I can get more information on Mapping and GIS efforts going on elsewhere in Montana?
Yes, click here to go to our links page for web addresses of other sites detailing GIS efforts in Montana.

General mapping & GIS Related FAQs

1. Does Missoula County produce electronic map data?
Yes, Missoula County is mapped digitally.
2. Is this data available to the public?
Yes it is.
3. Where can I go to get this map data?

There are various forms of digital data available to the public:

  1. County map data is currently available for download in CAD format on our FTP site at There is a Readme.txt file available on the FTP site as well, which contains instructions and additional information regarding this CAD map data.
  2. County map data is currently available for download in GIS format on our FTP site at and from
  3. Map data in raw form is viewable on the web at You will need to install Autodesk's free DWF Viewer browser plug-in the first time you view map data.
  4. An Interactive Map Server linking map data to ownership data is available at You can also try the new Flash-based Property Information System. It contains the same data but delivered with an improved interactive map.
  5. Orthophotos of 112 square miles in the Missoula area are available in .sid format at The orthophotos are in 1 square mile size files. The file naming convention is XXYYZZ.sid and XXYYZZ.sdw where XX=Section number, YY= Township number and ZZ=Range number. You will need both the .sid file (image) and the .sdw file (world file) for proper geo-referencing.