Blog · October 14, 2026 · Illinois
Massac County Flood Zone Map, Illinois
FEMA's free flood maps and the Massac County parcel viewer, used together for property near Metropolis.
Main page: Massac County, IL GIS & Parcel Viewer (official map link, Massac County facts and neighboring maps).
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The Massac County flood zone map question tends to arrive at a bad moment: a lender's letter, an insurance quote, or a permit counter in Brookport. Here's how to read FEMA's map for a Massac County, IL property and match it to the parcel record.
We'll cover finding a Massac County address on FEMA's map, what Zone A, AE and X mean, how the county viewer fits in, and what to do if the map looks wrong.
How to check the Massac County flood zone map
Start at the FEMA Flood Map Service Center and enter the property address in Metropolis or anywhere else in the county. Download the FIRM panel FEMA lists as effective for that part of Massac County. For an irregular lot near Joppa, try FEMA's National Flood Hazard Layer viewer and reports the zone wherever you click near Metropolis. Switch to the Massac County parcel viewer and locate the same property near Joppa. Match the Massac County lines and acreage to the FEMA view, since flood maps do not draw property lines in detail.
The county map you'll pair it with
The county's own public map is the Massac County parcel viewer, and it opens without an account for parcels in Brookport and the rest of the county. Use the search box for an address in Brookport or a parcel number, or simply zoom in and click a property near Joppa. If the official address for the Massac County, IL map ever changes, our directory page carries the current link for Brookport and the rest of the county.
Zone A, AE and X in plain English
Any Massac County parcel shaded as Zone A, AE, AH or AO sits in what FEMA calls a Special Flood Hazard Area, meaning FEMA estimates a 1-percent annual chance of flooding. Zone AE near Joppa means FEMA published a base flood elevation; plain Zone A means no detailed elevation was studied. Land near Joppa in shaded X (Zone B on older maps) sits in the moderate band between the 100-year and 500-year floods. Unshaded Zone X near Joppa is minimal risk.
Low ground and small streams around Metropolis
Small streams and ditches near Metropolis may not be studied in detail, which is why it is worth walking the ground after a heavy rain.
Insurance, permits and map changes
The zone shows up again when a loan on a house near Joppa is underwritten. If a house near Joppa is mapped in a high-risk zone and secures a loan from a federally regulated or insured lender, flood insurance is mandatory, as long as Massac County or the town participates in the NFIP. In Zone X near Metropolis, insurance is a choice, not a mandate, although some lenders require it anyway. If a building near Joppa sits above the flood line, a Letter of Map Amendment request is the formal route, supported by elevation data from a professional surveyor. New construction in a Massac County Special Flood Hazard Area has to meet local floodplain rules, so call the county or the town office in Metropolis before work starts.
Deeds and plats behind the Massac County map
The parcel layer for Massac County points back to recorded deeds and plats, kept by the county's recording office (its title varies by state). Copy the parcel number and legal description from the county record well before you request a deed for land near Brookport.
Near the Massac County line
Near the edge of the county, check the next map over: Johnson County, Pope County, Pulaski County, Livingston County, KY, and McCracken County, KY all border it. Every map bordering Massac County is listed on our Illinois directory.
Massac County at a glance
Town lots cluster around Metropolis, the county seat, and Brookport and Joppa. Smaller places such as Big Bay, Boaz, and Hillerman appear on the county map as little clusters of lots. Massac County had an estimated 13,661 people in 2023 (Census Bureau), spread across about 237 square miles. Platted neighborhoods near Metropolis give way to rural acreage elsewhere in the county.
Massac County, IL: common questions
Is there a floodplain layer in the Massac County parcel viewer?
Check the layer list in the Massac County parcel viewer; if Massac County includes a floodplain layer, confirm the zone on FEMA's map anyway.
Who prepares an elevation certificate for a house in Metropolis?
A professional surveyor or engineer prepares it, and the building office serving Metropolis may already have one on file for newer construction.
Can I build in a flood zone in Massac County?
Building in a Special Flood Hazard Area near Metropolis most commonly needs a floodplain permit and may require elevating the structure, so check with the county floodplain administrator.
Where can I see flood zones for land near Brookport?
FEMA's free map service covers Massac County: enter the address or pan to the property near Brookport, then note the zone label.
Is Zone AE near Brookport high risk?
Yes, a property near Brookport in Zone AE is high risk: a 1-percent-annual-chance floodplain where FEMA lists a base flood elevation.
Open the official Massac County, IL parcel map Massac County 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.