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Aerial maps (2)
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North Central, PA Regional Planning and Development Commission (1)
Allegan County GIS Data Library (11)
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Allen County GIS Data Download Page (11)
American Panorama (538)
Ann Arbor Data Catalog (35)
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Ashland County, WI GIS Open Data Portal (9)
Athens Conservancy GIS Center (53)
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Big Stone County Open Data (12)
Big Ten Academic Alliance Geospatial Information Network (9)
Brandeis University (1)
Brown County, Ohio (1)
CMAP (Chicago Metropolitan Agency for Planning) Data Hub (51)
Calvert County Open GIS Data Portal (16)
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Carroll County GIS Open Data (27)
Carver County GIS Data (42)
Cass County GIS Downloadable Files (10)
Center for Ancient Middle Eastern Landscapes, Institute for the Study of Ancient Cultures, University of Chicago (8,792)
Center for Rural Pennsylvania (1)
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Cook Central (236)
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Cornell (473)
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Evansville, Vanderburgh County, Indiana Open Data Collection (50)
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GEOhio Spatial Data Discovery Portal (314)
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GIS Data Downloads for Erie County, Ohio (56)
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GeoDa Data and Lab (73)
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Grant County Open Data Hub (28)
Hamilton County, Indiana Open Data Collection (42)
Harford County Planning and Zoning Open GIS (74)
Harvard (183)
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High Country News (1)
Hoosier Resilience Index: Indiana (17)
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Humanitarian Data Exchange (6,701)
ICPSR (Inter-university Consortium for Political and Social Research) (1)
Illinois DOT Open Data Portal (99)
Illinois Geospatial Data Clearinghouse (192)
Indiana Covid-19 Cases Tracker (1)
Indiana University (14,884)
IndianaMap (374)
Iowa Emergency Operations Center (1)
Iowa Geodata (235)
IowaDOT Open Data (546)
Kenosha County, WI GIS Open Data Portal (31)
Lake County Illinois Open Data Portal (53)
Land Records Data Portal of Columbia County, WI (85)
LandScan Global Population Database (23)
Library of Congress Geography and Map Division (1)
Lincoln Open Data and Performance Management (90)
Linn County, Iowa Open Data Portal (53)
Lorain County GIS Data (85)
Macoupin Data (2)
MapHub (1)
Maryland National Capital Parks and Planning Commission (1)
Maryland iMap (1,249)
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National Renewable Energy Laboratory (1)
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Natural Resources Research Institute (106)
Nebraska Game & Parks Map and Data Portal (1)
NebraskaMap (152)
New Jersey Department of Environmental Protection's (NJDEP) Bureau of GIS (300)
New Jersey Farmland Preservation Program (22)
New Jersey Geographic Information Network (NJGIN) Open Data Portal (310)
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Northwestern University (251)
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OpenIndy Data Portal (82)
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PHLmaps (322)
Pennsylvania Department of Conservation and Natural Resources Open Data Portal (57)
Pennsylvania Department of Environmental Protection (156)
Pennsylvania Spatial Data Access (PASDA) (2,037)
Pennsylvania State University (3,888)
Peoria County GIS Open Data Portal (70)
Pierce County GIS Open Data Portal (4)
PolicyMap (387)
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Pope County Open Data (41)
Prince George's County GIS Open Data (262)
Prince George's County Open Data Portal (13)
Princeton (1,004)
Purdue University (120)
Racine County GIS Download (41)
Ramsey County Open Data (36)
Renville County Open GIS Data (44)
Russian Military Topographic Map Collection (3)
Rutgers University-New Brunswick (4,554)
SEMCOG Open Data (36)
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Sarpy County GIS Portal (131)
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SimplyAnalytics (12)
Social Explorer (448)
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Stanford (1,109)
Stark County GIS Data (110)
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Summit County GIS Data (31)
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The Newberry Library (53)
The Ohio State University (255)
Three Rivers Park District Open Data (5)
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U.S. Fish and Wildlife Service Open Data (1,972)
UM Matthaei Botanical Gardens and Nichols Arboretum (62)
UW Digital Collections Center (2,596)
UW-Madison Robinson Map Library (6,077)
University of Chicago (71)
University of Chicago Library GIS Data Hub (34)
University of Illinois Urbana-Champaign (2,501)
University of Iowa (3,595)
University of Maryland (274)
University of Michigan (1,140)
University of Minnesota (5,990)
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University of Nebraska-Lincoln (60)
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Waukesha County GIS Download (37)
Waupaca County GIS Download (29)
Waushara County GIS Download (10)
Western Pennsylvania Regional Data Center Open Data (52)
Wilkin County, Minnesota Open Data (17)
Wisconsin Geological and Natural History Survey (61)
Wisconsin Rapids Online Map Portal (18)
Wisconsin State Cartographer's Office (1)
WisconsinView (2,170)
Wood County Open Data Portal (13)
Yellow Medicine County Hub (5)
York County, PA GIS Open Data Portal (50)
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