Blog · October 14, 2026 · Illinois
Highland Flood Zone Map, Illinois: a practical guide
Flood zones are set by FEMA, and checking one near Pierron takes a few minutes.
Main page: Madison County, IL GIS & Parcel Viewer (official map link, county facts and neighboring maps).
Platbookmapper is an Amazon Associate. If you buy through an Amazon link on this page, we earn a commission. The link is a product, not the county map.
Weighing a property around Grantfork? The Highland flood zone map tells you whether the lot falls inside a mapped floodplain, and no account is needed. Covered here for Highland: the free FEMA tools, what each zone label means, when insurance is required and what a LOMA is.
The Highland flood zone map: start here
The official source is FEMA's Flood Map Service Center: search an address around St. Jacob, and choose the dynamic map. Vacant ground around Alhambra can still be found: search the nearest road then click the parcel area.
The free map to start with
Go first to the Madison County parcel viewer; it covers every assessed parcel from Pierron to Marine. If the land is near Alhambra, enter a street address, an owner's name or a parcel number, and the matching parcel lights up. For a home near Pierron, write down the parcel ID before closing the panel; each clerk in the county uses it to find the file.
Beyond the mapped zones
Creeks and ditches near St. Jacob aren't always studied in detail, so walk the land after rain. Wetlands near Pierron can limit building even outside a flood zone; check the National Wetlands Inventory mapper for a first look.
Where Highland fits in
Highland is part of Madison County, Illinois, and the county assessor maps its lots. Local government in Highland handles things like zoning, permits and utilities within town limits, but the county runs assessment and recording. Land beyond the town limits toward St. Jacob usually falls under county rules rather than the town's.
On site with the map
Most viewers work in a phone browser, useful out on a road near Alhambra, so load it before you lose signal. A screenshot of the parcel near St. Jacob with its ID is a good backup.
Who handles what
Questions about value or the owner field for land near Marine belong with the Supervisor of Assessments, working with township assessors, which maintains the tax roll. Questions about what you can build around Troy are for the local planning and health departments, depending on whether the land is inside town limits.
Next door to Madison County
Madison County borders Bond County, Clinton County, Jersey County, Macoupin County, and Montgomery County, and each of those keeps its own parcel map. Ground near Pierron that runs to the line may show up in two county records, so look at the neighboring map too. If you're looking near Grantfork, the Platbookmapper state page links every bordering county map for Illinois.
Deeds, plats and who keeps them
When the details count, get the recorded deed through the county Recorder of Deeds (in many counties the County Clerk and Recorder); the parcel map near Pierron only summarizes it. Inherited tracts around Troy may go back through several deeds, and a title company is worth hiring before a purchase.
Reading the legal description
Illinois uses the Public Land Survey System, so deeds around Pierron reference sections and townships. A standard section is about one square mile, roughly 640 acres, and a township holds 36 of them, though corrections make some sections near Alhambra odd-sized. Write down the legal description for the tract near Alhambra for any title or survey request.
Decoding the flood zone labels
An AE label comes with a base flood elevation, and an unnumbered A zone has none; builders around Grantfork design to it. Closer to Alhambra, shaded Zone X is moderate risk, between the 1% and 0.2% annual chance floods; unshaded X is minimal risk.
What to request from a seller
Request for any Elevation Certificate for the house near Marine; an insurance quote early avoids surprises.
Use the county map alongside FEMA
FEMA doesn't draw property lines, so check the Madison County parcel viewer too for the outline of the tract near Grantfork.
Money questions tied to the zone
Near St. Jacob, ask for an Elevation Certificate: it compares the building to the BFE. Building or adding on near Grantfork in a mapped zone often needs a floodplain permit; check with the county or town building office early.
Frequently asked
Does the county parcel map show flood zones for land near Troy?
Generally, a flood layer may appear in the Madison County parcel viewer layer list, but FEMA's own map is the official source.
Is my property near Grantfork in a flood zone?
Usually, look up the spot near Pierron in FEMA's National Flood Hazard Layer viewer; then confirm the parcel on the county viewer.
Will my lender require flood insurance near Alhambra?
For most people, for a building near Marine in an A or V zone with a federally backed or regulated mortgage, it's generally required; elsewhere it's optional.
What if the flood map is wrong for my lot near St. Jacob?
In most cases, FEMA's LOMA process is the usual route when a building near St. Jacob sits above the base flood elevation; it starts with an elevation survey.
Where do I ask about an assessment near Grantfork?
Values are the Supervisor of Assessments, working with township assessors's job; recorded documents belong to the county Recorder of Deeds (in many counties the County Clerk and Recorder); planning offices cover zoning near St. Jacob
Open the official Madison County, IL parcel map See it in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.