LaSalle County GIS Portal (Illinois)


LaSalle County Assessor Offices are charged with determining the value of taxable property in their county or local area in order to calculate LaSalle County property taxes. In addition to property values, Assessors maintain detailed county and local maps, including Geographic Information Science (GIS) maps. These LaSalle County GIS maps can show public property, parks, property divisions, and roads, as well as property assessments and property taxes in LaSalle County, Illinois. These maps can also include place names, bodies of water, flood zones, property zones, and other geographic information. Some Assessors may keep historic GIS maps that include historic property tax assessments. These maps may be available on the LaSalle County Assessor Office website.

La Salle Township Assessor LaSalle IL 931 1st Street 61301 815-223-0807

Lasalle County Assessor's Office Ottawa IL 707 East Etna Road 61350 815-434-8233


LaSalle County Town and City Halls provide municipal services for their town or city, including preserving vital records and maintaining records on their jurisdiction such as LaSalle County GIS maps. The GIS maps at a LaSalle County Town or City Hall can include property boundaries, public property, unclaimed parcels, and roads, as well as appraisal values for properties and property tax assessments in LaSalle County, Illinois. These GIS maps may also show population information, place names, zoning boundaries, bodies of water, flood zones, and other geographic information. Some Town and City Halls also have historical maps of their area. These maps are often available to the public on the LaSalle County Town and City Hall website.

Brookfield Town Hall Seneca IL 2099 North 27th Road 61360 815-357-1144

Dayton Township Town Hall Ottawa IL 3312 East 18th Road 61350 815-433-0855

Fall River Township Town Hall Ottawa IL # 1816, 1805 N 25th Rd, # 1816 61350 815-434-5325

Kangley Town Hall Streator IL 4501 Main Street 61364 815-672-5460

La Salle City Hall LaSalle IL 745 2nd Street 61301 815-223-3755

Oglesby City Hall Oglesby IL 110 East Walnut Street 61348 815-883-3389

Ottawa City Hall Ottawa IL 301 West Madison Street 61350 815-433-0161

Seneca City Hall Seneca IL 340 North Cash Street 61360 815-357-8771

Tonica Village Town Hall Tonica IL 605 East Wauponis Street 61370 815-442-3101


LaSalle County Clerk Offices maintain public records for a county or local government, which includes GIS maps. These maps provide detailed information on the area, including LaSalle County property maps that show boundaries, public property, property divisions, and in some cases, population information in LaSalle County, Illinois. They may also include property value assessments and property tax rates. LaSalle County GIS maps can show place names, bodies of water, zoning information, flood zones, and other geographic information. Clerks may also have historic GIS maps from the USGS or other organizations, and these maps are often available online through the Clerk Office website.

Earlville City Clerk Earlville IL 210 West Railroad Street 60518 815-246-9588

La Salle City Clerk LaSalle IL 745 2nd Street 61301 815-223-0077

La Salle Clerk Ottawa IL 119 West Madison Street, Ste 200 61350 815-433-0774

Lasalle County Clerk Ottawa IL PO Box 430 61350 815-434-8202

Leland Village Clerk Leland IL 285 West Genessee Street 60531 815-495-9530

Mendota City Clerk Mendota IL 800 Washington Street 61342 815-539-7459

Oglesby City Clerk Oglesby IL 128 West Walnut Street 61348 815-883-5122

Peru City Clerk Peru IL 1727 4th Street 61354 815-223-0061


LaSalle County Recorders of Deeds keep real estate records to ensure the accuracy of property and land records. In addition to deeds, Recorders of Deeds also have detailed county and local maps, including LaSalle County GIS maps that show property lines, building information, public property, unclaimed parcels, as well as property value assessments and property tax information. These GIS maps may also include place names, zoning boundaries, bodies of water, flood zones, and other geographic information in LaSalle County, Illinois. The Recorder of Deeds may also have historic GIS maps. These maps are often available on the LaSalle County Recorder of Deeds website.

La Salle County Recorder of Deeds Ottawa IL 707 East Etna Road 61350 815-434-8226