Blog · October 14, 2026 · Pennsylvania
Juniata County Flood Zone Map, Pennsylvania
Look up any Juniata County address on FEMA's flood map, read the zone, and match it to the parcel record for land around Port Royal.
Main page: Juniata County, PA GIS & Parcel Viewer (official map link, Juniata County facts and neighboring maps).
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Is that lot in Port Royal in a flood zone? The Juniata County flood zone map answer comes from FEMA, and it is free to look up. You can check it yourself for any Port Royal address in a few minutes.
Below are the FEMA links, a plain reading of the zone labels, notes on where water shapes land around Port Royal, and short answers to common questions.
Look up the Juniata County flood zone map step by step
Open the FEMA Flood Map Service Center and type a county street address, say one in Mifflin. If a tract close to Mifflintown has no street number yet, search the nearest road and pan to it. For an interactive view of the county, the National Flood Hazard Layer viewer is easier to use; zoom to the tract close to Mifflintown and click. Then open the Juniata County parcel viewer for Juniata County to confirm the parcel near Mifflin. The Juniata County record gives the parcel number and legal description that an insurer or lender near Mifflin may ask for.
The county map you'll pair it with
For land around Mifflintown, open the Juniata County parcel viewer; it is the map Juniata County itself publishes. Click any Juniata County parcel near Mifflin to open its record: owner, parcel ID and assessed acreage are generally listed. If the official address for the Juniata County, PA map ever changes, our directory page carries the current link for Mifflin and the rest of the county.
Getting oriented in Juniata County, PA
Town lots cluster around Mifflintown, the county seat, and Mifflin, Port Royal, and Thompsontown. Unincorporated communities in the county, including Oakland Mills, East Salem, and East Waterford, show up as small groups of parcels along the roads. Juniata County had an estimated 23,243 people in 2023 (Census Bureau), spread across about 391 square miles. The Juniata County map mixes subdivision lots near Thompsontown with farm and wooded tracts farther out. Landforms such as the Shade Mountain and Tuscarora Mountain shape where roads and homesites fall in Juniata County. Juniata County was organized in 1831, so deeds for older farms near Mifflintown can run back a long way.
Zone A, AE and X in plain English
On the FIRM covering Juniata County, zones that start with A or V are Special Flood Hazard Areas, meaning FEMA estimates a 1-percent annual chance of flooding. Zone AE near Mifflintown means FEMA published a base flood elevation; plain Zone A means no detailed elevation was studied. If a Juniata County parcel lists shaded Zone X, it sits in the moderate band between the 100-year and 500-year floods. Unshaded X (or C) on the Juniata County panel means minimal risk.
Tracts that cross the Juniata County line
Juniata County borders Dauphin County, Franklin County, Huntingdon County, Mifflin County, and Northumberland County, and each keeps its own parcel map and records. Our Pennsylvania page links each map neighboring Juniata County.
Unmapped creeks in Juniata County
A creek near Mifflintown that lists no detailed zone can still flood; FEMA says moderate- and low-risk areas still carry risk.
What a flood zone means for a Juniata County buyer
The zone lists up again when a loan on a house near Mifflintown is underwritten. When a structure near Mifflintown falls inside an A or V zone and carries a federally backed mortgage, a flood policy becomes a loan condition under the Flood Disaster Protection Act, wherever the community joins the NFIP. Outside the A zones around Mifflintown, coverage is optional, although some lenders require it anyway. When a county homesite is on a rise inside a mapped zone, FEMA's LOMA process allows a review; a surveyor near Mifflintown can supply the elevation data. Building or filling inside a mapped zone near Mifflin commonly requires a permit and an elevation check, and the building office serving Mifflintown explains the steps.
Where Juniata County land records are kept
Deeds and plats behind the Juniata County map are kept by the county's recording office; the official Juniata County website names which office that is. Easements and access rights near Port Royal live in recorded documents, so read the deed, not just the county map.
Quick answers for Juniata County
Do I need a permit to build in the floodplain near Mifflin?
Often, but local floodplain rules apply; ask the county or town building office in Mifflin before you buy.
Is Zone AE near Thompsontown high risk?
Zone AE on a lot in Mifflin is a mapped 100-year floodplain with a base flood elevation, so mandatory insurance rules apply to federally backed mortgages.
What if FEMA's map is wrong about my house near Thompsontown?
An owner near Thompsontown can request a Letter of Map Amendment from FEMA with elevation data, generally from a professional surveyor.
What does 100-year flood mean for Juniata County land?
Not at all; a Juniata County tract in that zone has a 1-percent chance of flooding every year, so floods can come in back-to-back years.
Where do I get an elevation certificate in Juniata County?
Hire a professional surveyor or engineer who works in Juniata County; ask the local floodplain office first in case one exists.
Where can I see flood zones for land near Thompsontown?
Search the Mifflin address on FEMA's Flood Map Service Center; the effective panel lists the zone, and the county parcel map confirms the tract.
Open the official Juniata County, PA parcel map Juniata 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.