Blog · October 14, 2026 · Pennsylvania
Allentown Flood Zone Map, Pennsylvania: a practical guide
Flood zones are set by FEMA, and checking one near Bethlehem takes a few minutes.
Main page: Lehigh County, PA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Weighing a property around Bethlehem? The Allentown flood zone map tells you whether FEMA puts it in a high-risk zone, and no account is needed. Covered here for Allentown: finding the address on FEMA's map, reading the zone codes, and pairing it with the Lehigh County ArcGIS parcel map.
The Allentown flood zone map: start here
The official source is FEMA's Flood Map Service Center: search an address around Fountain Hill, and choose the dynamic map. Rural land near Macungie with no street number can still be found: zoom in from US Route 222 and click inside the land.
Pulling up a parcel
Property in and around Fountain Hill are published on the Lehigh County ArcGIS parcel map, a viewer that needs no account. When a rural tract has no street number, pan along US Route 222 until the lines appear, then click inside the one you want. If you're looking near Emmaus, the parcel card normally shows the owner of record, acreage on the tax roll, a parcel ID and in many cases the last transfer.
Legal descriptions in Pennsylvania
Older tracts around Catasauqua are often described by metes and bounds, listing bearings, distances and landmarks. Town lots near Bethlehem are typically described by lot and block, which is simpler to follow. Keep the legal description for land near Coplay when you talk to a surveyor.
Where Allentown fits in
Allentown lies within Lehigh County, Pennsylvania, and the county assessor maps its lots. As the county seat, Allentown hosts the courthouse, so deeds and plats are filed in town. Local government in Allentown handles matters such as zoning, permits and utilities within town limits, and the county still keeps the parcel and deed records. Land beyond the town limits out by Catasauqua usually falls under county rules instead.
What to request from a seller
Ask the listing agent about past flood claims on the property near Emmaus; an insurance quote early avoids surprises.
Water near Catasauqua
Creeks and ditches near Bethlehem may not have detailed mapping, so look for water marks and debris lines. Wet ground around Catasauqua is a separate issue from flood zones; the National Wetlands Inventory mapper shows mapped wetlands.
Zones on the Allentown flood zone map
An AE label includes a base flood elevation (BFE), which plain A zones lack; that elevation drives building rules near Catasauqua. On ground around Emmaus, shaded Zone X is moderate risk, between the 1% and 0.2% annual chance floods; unshaded X is minimal risk.
What the map can't tell you
Parcel lines are drawn for taxes, not measured on the ground, so a tree line near Catasauqua can sit some distance off the line on screen. Records update in batches, so a fresh transfer around Coplay can take weeks to appear.
Matching the zone to the lot lines
FEMA's map shows zones but not ownership, so check the Lehigh County ArcGIS parcel map too to confirm you have the right parcel near Emmaus.
Recorded documents worth pulling
The map is an index, not the title: recorded deeds, plats and easements for land near Bethlehem are filed with the Recorder of Deeds. Long-held tracts around Fountain Hill can trace back through a long string of deeds, so a title company is worth hiring on a real sale.
What a flood zone means for a buyer
If a building sits in a Special Flood Hazard Area and a federally regulated lender is involved, flood insurance is generally required where the community participates in the National Flood Insurance Program, whether the land is near Macungie or elsewhere in the county. New construction in a floodplain near Bethlehem usually means extra permit review; ask the local floodplain administrator before you plan.
Who handles what
For assessment questions about property around Coplay are handled by the county assessment office, which maintains the tax roll. Questions about what you can build around Emmaus go to planning, building or health offices, depending on whether the land is inside town limits.
Getting your bearings
Allentown is the county seat, home to the main records offices. You'll also find Emmaus, Catasauqua, Fountain Hill, and Coplay, each with its own cluster of lots. Roughly 377,754 people live in Lehigh County (Census estimate, 2023) across about 345 square miles. Lehigh County was formed in 1812, and some chains of title near Catasauqua are long.
Frequently asked
Is there a flood layer on the parcel viewer near Fountain Hill?
Short answer: a flood layer may appear in the Lehigh County ArcGIS parcel map layer list, though it can lag behind FEMA's current panels.
What is a base flood elevation around Catasauqua?
Short answer: the BFE is printed in AE zones on FEMA's map; surveyors near Catasauqua use it often.
Is AE a high-risk flood zone around Emmaus?
Short answer: an AE zone has a 1% annual chance of flooding and a base flood elevation, which shapes building rules near Macungie.
When is flood insurance required in Allentown?
For a building near Coplay in an A or V zone with a federally backed or regulated mortgage, it's generally required; outside those zones it's your call.
Can I use the viewer in the field near Macungie?
The map near Coplay usually works on a phone; load it before you lose coverage near Macungie.
Open the official Lehigh County, PA 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.