Parcel Data for DuPage County, IllinoisThis parcel layer makes up the county working parcel feature layer. This is not the end of tax year parcel layer. Some new parcel polygons in this layer may have not been finalized by the DuPage County Clerks Office at this time.DuPage County Parcel Data: NOTE: Field ACRE_SOURCE = 0 is Calculated, 1 is Deeded, NULL is unverified.This web map is utilized in the "Parcel Viewer" interactive web mapping application.

Shapefile showing boundaries of townships in 1851. Features based upon modern GIS maps of township boundaries and then adjusted to match information from Flower and Mendel's 1861 property map of Cook County, Illinois.

Park Districts of DuPage County, Illinois, for the Assessment Year 2024

Municipalities (corporation boundaries) in DuPage Co., Illinois, updated for the Assessment Year 2024.

Web map for Municipality use / Impacts to Special Management Areas.

Sanitary water districts in DuPage Co., Illinois, for the Assessment Year 2023

Streams in DuPage Co, IL

Locations of public libraries in DuPage Co., IL

Water Commission of DuPage Co., Illinois

Township boundaries for DuPage Co., IL

Hydrography Polygons Representing DuPage County, Illinois hydrography: lakes, ponds, wetlands, rivers, streams, creeks, and ditch polygons. The DuPage County surface hydrography coverage reflect extensions to the original surface hydrography ARC/INFO coverage that was built from 1:2400 scale aerial photography and planimetric mapping. The original 1991-92 coverage embraced a simple line-based structure with no polygon definitions. Extensions to the original coverage structure are meant to accommodate more sophisticated Department GIS application needs such as area-based (polygon) measurements, attribute driven thematic displays, network modeling to support hydrologic/hydraulic flow routing, and stream corridor management. An extensive quality control effort was completed in 1996. Updated Spring\Fall 2006 using most current orthophotography. Additional updates have been made to this dataset, and have been completed using the Spring 2013 orthophotography. Updates will be made as needed.

WNV test results received to date for mosquito traps in 2025 in DuPage Co are given. Traps with positive tests are shown in red. Test results for all traps are given as a percentage of positive pool counts to total counts in column graph, as well as figures. Note: Trap locations on this map are generalized.

Surface water districts in DuPage Co., Illinois, for Assessment Year 2024

Centerline developed and maintained by DuPage County GIS Division.

DuPage County Unincorporated Zoning Data Web Map.

State Senate districts for DuPage Co., IL

PLSS sections for DuPage Co., IL

A polygon feature class of DuPage County in Illinois.

High School Districts of DuPage Co, Illinois, for Assessment Year 2024

DuPage County, Illinois Home Page:http://www.dupageco.orgThis Web Application Shows: DuPage County, Illinois District Information (How to view other districts on the web map) - Click on the "Layers" button then check "on" or "off" different districts in DuPage County Illinois.DuPage County Board District Map Home PageTOOLS:IDENTIFY - Click on the center of District. A window will appear. Scroll down to view data.Zoom IN\OUT - Use your mouse wheel to Zoom IN or OUT. Zoom IN - Hold down keyboard "Shift" button & left mouse click on screen and draw a red "Zoom In" box.PAN - Left Mouse click on screen and hold down button. Pan in any direction then let go of left mouse button. Your view will update.