General Data

Q:  What's the difference between a guest and subscription log in?

A:  Guests can freely access the map and a limited amount of parcel data.  For example, subscribers may search and view owner name but guests cannot.  See the Comparison document for a summary of differences.

Q:  I'm a subscriber and cannot log in, what should I do?

A:  Try retyping the password, especially if your browser is set to remember it.  Try clearing the browser cache and log in again.  Call the GIS department at 309-937-3404 or the Assessment Office at 309-937-3570.  You can also email bdlang@henrycty.com.

Q:  Why doesn't the map reflect a property split or combination?

A:  The document may have been recorded during a time when property line changes are on hold until finalization of taxes.  Property line changes recorded AFTER September are reflected in the following year.

Q:  How often is the online data updated?

A:  The update dates for the map is on the disclaimer page.  But in general, the mapping data is updated once a month and the assessment data, as identified through the map, is updated weekly.

Q:  Who should be contacted if I think something is incorrect? 

A:  If there is a question about the boundaries of a parcel contact the GIS Office at 309-937-3404.  If there is a question about the assessment information or you need to make a change of address contact the Assessment Office at 309-937-3570.

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About GIS Data

Q:  Is the data available for download?

A:  Some assessment data can be downloaded through the mapping by clicking the "save" button on the parcels identify results screen.  Contact the GIS department for fees for obtaining geographic and/or tabular ownership data.

Q:  When was the aerial photography taken?

A:  April 2014

Q:  What projection and coordinate system does Henry County use?

A:  Transverse Mercator projection, North American Datum 1983, State Plane Illinois West

Q:  What is a shapefile?

A:  The shapefile is a widely used file format for exchanging GIS data between GIS and CAD systems.  One shapefile consists of several individual files pertaining to one feature class, like parcel polygon.

Q:  What are the fees to obtain data from the GIS department?

A:  There are four general fees: maps, reports, cadastral data, and tabular data. 

• Maps: A typical letter size page is $2 while a 34" x 44" plotted page is $24.
• Reports: $2 plus $0.05 per letter page
• Cadastral data:  Is calculated at $25 plus $0.10 per parcel
• Tabular data:  is calculated at $25 plus $0.05 per record for 1-3000 records, $150 plus $0.04 per record for 3001 to 7000, $310 plus $0.03 per record for 7001 to 15000, or $550 plus $0.02 per record for 150001 or more records

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About Online Mapping

Q:  How do I find help?  Is there a tutorial?

A:  Yes, click the question mark on the right side of the top tool bar.  This will expose additional help for navigating the map and for selecting map features.  A tutorial document is also available.  See Henry County Assessment-GIS Website User Guide.

Q:  What do the different lines and colors mean?

A:  Turn on the legend in the "visibility layers" part of the tool bar.  The colors of most-used lines are:

• Red - property lines and dimensions
• Yellow - road right-of-way lines and dimensions
• Cyan - subdivision lot lines and dimensions
• Green - subdivision boundary
• Orange - railroad lines and dimensions

NOTE:  Only one line is displayed when boundaries overlap.  For example, the road right-of-way line displays when it's the same as a property line.

Q:  Can I find property information outside of Henry County, IL?

A:  No.  This website only pertains to Henry County, IL.

Q:  Can you give tips for searching data?

A:  Yes.  Searches are not case sensitive (a=A, b=B, etc.) and entering more letters narrows the search possibilities.  Dashes are not used in parcel number searches.  Owner names are searched by LASTNAME, FIRSTNAME

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Property Inquiry