LaSalle County GIS Data (Illinois)

Search for LaSalle County, IL GIS data. A GIS data search can provide information on GIS maps, property lines, county lines, city lines, public property, elevations, flood zones, school boundaries, earthquake zones, property appraisal values, erosion, water pollutants, topography, soil composition, sewers, public utilities, building hazards, population information, demographic information, place names, public property, parks, campgrounds, trails, trail maps, historic maps, historic GIS maps, town maps, county maps, city maps, and neighborhood boundaries.


An Assessor Office is responsible for appraising the taxable property in an area in order to calculate property taxes in LaSalle County, Illinois. As part of this job, LaSalle County Assessors maintain detailed county and local maps, including Geographic Information Science (GIS) data. These LaSalle County GIS maps typically include property divisions, plots, buildings, property appraisal values, and property taxes. They may also include public property, parks, roads, place names, bodies of water, and other local geographical information, as well as flood zones, county zone lines, and school boundaries. These maps can be useful for a number of reasons, including buying and selling property. Assessors may provide online access to their LaSalle County GIS data on their websites.

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


A Town or City Hall provides municipal services for their town or city, including keeping vital records and maintaining documents on their jurisdiction such as maps with GIS data in LaSalle County, Illinois. These GIS maps typically include property boundaries, real estate appraisal values, LaSalle County property tax assessments, public property, and unclaimed parcels. The maps may also show place names, LaSalle County zoning boundaries, bodies of water, and flood zones, as well as population and demographic information. Some Town and City Halls also maintain historical maps of their area. These maps are often available on the Town or 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 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


A Clerk Office maintains public records for a county or local government, including GIS data in the form of maps. These GIS maps provide detailed information such as property boundaries, roads, public property, parks, and in some cases, population and demographic information. GIS data can also show LaSalle County property value assessments, property taxes, flood zones, zoning boundaries, and earthquake zones, as well as place names, bodies of water, and other geographic information. Clerks may also have historic GIS maps from the USGS or other organizations. LaSalle County GIS data is often accessible 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 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


A Recorder of Deeds keeps real estate documents to ensure the accuracy of property and land records in LaSalle County, Illinois. In addition to filing deeds that provide information on property sales and transfers, Recorders of Deeds also have detailed county and local maps, including LaSalle County GIS data. These maps can include property lines, building information, unclaimed parcels, property value assessments, and property tax information. They may also show LaSalle County place names, flood zones, zoning boundaries, neighborhood lines, bodies of water, and other geographic information. The Recorder of Deeds may provide access to GIS data on its website.

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


A Soil and Water Conservation Office provides information on the conservation and management of natural resources in LaSalle County, Illinois. They are also responsible for developing, implementing, and enforcing policies to protect these natural resources. LaSalle County Soil and Water Conservation Offices maintain GIS data in the form of maps to monitor soil and water, and these LaSalle County maps can show ground and surface water, stormwater runoff, irrigation, erosion, flood zones, and sources of pollution. These maps can be important for buying, selling, or improving property, and they may be available through the Soil and Water Conservation Office website.

La Salle County Soil and Water Conservation Ottawa IL 1691 North 31st Road 61350 815-433-0665


The Army Corps of Engineers is a federal agency that provides engineering services, including managing ports and waterways, protecting against floods and storm damage, and maintaining public recreation areas in LaSalle County, Illinois. The Army Corps of Engineers keeps LaSalle County GIS maps that show navigable waters, tributaries, water depths, bridges, and ports, as well as information on flood zones, dams, and hydroelectric plants. GIS maps of Army Corps recreation areas can include bodies of water, shelters, campgrounds, elevations, and trails. These LaSalle County maps may be available on the Army Corps of Engineers website.

Ottawa Army Corps of Engineers Ottawa IL 410 East Stevenson Road 61350 815-434-7357


An Auditor Office provides oversight for government agencies, including evaluating the performance of government offices and their compliance with laws, rules, and regulations in LaSalle County, Illinois. Auditors also investigate corruption and fraudulent activities. Auditor Offices maintain a number of records related to their local area, which can include GIS data that shows LaSalle County property boundaries, city or county lines, flood zones, earthquake zones, and property taxes. These LaSalle County maps may also provide place names, bodies of water, and other geographic information. Auditors may provide online access to their GIS maps.

Ottawa Auditor Ottawa IL 707 East Etna Road 61350 815-434-8222


A Building Department creates and enforces building codes and zoning regulations in order to ensure the construction of safe buildings in LaSalle County, Illinois. As part of that job, Building Departments maintain GIS data that can include LaSalle County GIS maps on the topography, elevation, soil composition, and flood zones for the local area. This information can be important for adhering to building codes and meeting zoning rules. These GIS maps may also show LaSalle County parcels, lots, subdivisions, and tracts of land, as well as sewers, public utilities, and other building hazards. GIS data may be available on the Building Department website.

Peru Zoning Peru IL 1901 4th Street 61354 815-223-1148