Flood Zone API Get a free key

Flood map coverage in Mississippi

FEMA's National Flood Hazard Layer holds 3,129 FIRM panels for Mississippi from 82 digital flood map databases, reaching 82 of its 82 counties. Computed September 29, 2026.

3,129FIRM panels
78%took effect before September 29, 2016
2025-11-28newest panel (28025C0215E)
32LOMRs in effect

What to expect from lookups here

A real lookup in Mississippi

The point is the Census internal point of Clay County, the county with Mississippi's most recently effective FIRM panel. FEMA's map puts it in zone X (area of minimal flood hazard). Recorded September 29, 2026.

Request
curl -sG https://api.floodzoneapi.com/api/v1/flood/zone \
  -H "Authorization: Bearer $FZA_KEY" \
  -d lat=33.65967 -d lon=-88.78247
Response 200
{
  "query": {
    "lat": 33.65967,
    "lon": -88.78247
  },
  "location": {
    "lat": 33.65967,
    "lon": -88.78247,
    "geocoder": null,
    "precision": "input_coordinates",
    "matched_address": null,
    "candidates": null,
    "county": null,
    "county_fips": null,
    "state": null
  },
  "flood_zone": {
    "mapped": true,
    "zone": "X",
    "subtype": "AREA OF MINIMAL FLOOD HAZARD",
    "description": "Area of minimal flood hazard. Outside the Special Flood Hazard Area.",
    "sfha": false,
    "static_bfe": null,
    "depth": null,
    "dfirm_id": "28025C",
    "polygon_id": "28025C_81",
    "at_zone_boundary": false,
    "other_zones": []
  },
  "firm_panel": {
    "panel": "28025C0175D",
    "effective_date": "2011-05-03",
    "panel_type": "Countywide, Panel Printed",
    "dfirm_id": "28025C",
    "other_panels": []
  },
  "source": {
    "dataset": "FEMA National Flood Hazard Layer (NFHL)",
    "service": "https://hazards.fema.gov/arcgis/rest/services/public/NFHL/MapServer",
    "layers": [
      {
        "id": 28,
        "name": "Flood Hazard Zones"
      },
      {
        "id": 3,
        "name": "FIRM Panels"
      }
    ],
    "query_point": {
      "lat": 33.65967,
      "lon": -88.78247
    },
    "queried_at": "2026-09-29T08:37:46Z",
    "cached": true,
    "cache_ttl_seconds": 86400
  },
  "notice": "Informational. This is the zone shown on FEMA's effective flood map (NFHL) at this point. It is not a Standard Flood Hazard Determination (FEMA Form 086-0-32), a prediction of flood risk, or an insurance quote, and it does not reflect a Letter of Map Amendment issued for a single structure."
}

Every digital flood map in Mississippi

MapDFIRM IDID typePanelsNewest panelOldest panelOver 10 years oldLOMRs in effect
Adams County28001CCounty252011-06-162011-06-16250
Alcorn County28003CCounty282010-09-172010-09-17280
Amite County28005CCounty242010-09-292010-09-29240
Attala County28007CCounty322011-08-022011-08-02320
Benton County28009CCounty162008-10-022008-10-02160
Bolivar County28011CCounty552021-03-232017-03-2100
Calhoun County28013CCounty312010-08-192010-08-19310
Carroll County28015CCounty282025-03-112017-05-0200
Chickasaw County28017CCounty232025-11-282010-01-06200
Choctaw County28019CCounty222007-09-282007-09-28220
Claiborne County28021CCounty232021-07-202010-04-19190
Clarke County28023CCounty412011-09-022011-09-02410
Clay County28025CCounty312025-11-282011-05-03240
Coahoma County28027CCounty352021-12-162012-02-02130
Copiah County28029CCounty232008-12-162008-12-16232
Covington County28031CCounty282010-04-052010-04-05280
DeSoto County28033CCounty642018-03-062007-06-04508
Forrest County28035CCounty562021-11-192010-03-02440
Franklin County28037CCounty232010-01-062010-01-06230
George County28039CCounty212012-09-192008-10-16210
Greene County28041CCounty342021-11-192012-01-06290
Grenada County28043CCounty232011-05-242011-05-24230
Hancock County28045CCounty972019-09-272009-10-16951
Harrison County28047CCounty1012017-12-212009-06-16927
Hinds County28049CCounty782021-07-202009-11-18620
Holmes County28051CCounty472025-01-172012-01-18410
Humphreys County28053CCounty362021-03-232012-03-15250
Issaquena County28055CCounty222012-02-162012-02-16220
Itawamba County28057CCounty342025-11-282019-02-1500
Jackson County28059CCounty1292017-12-212009-03-161220
Jasper County28061CCounty302011-07-042011-07-04300
Jefferson County28063CCounty172010-09-292010-09-29170
Jefferson Davis County28065CCounty282010-12-172010-12-17280
Jones County28067CCounty362021-11-192010-09-29240
Kemper County28069CCounty302007-09-052007-09-05300
Lafayette County28071CCounty422010-11-262010-11-26424
Lamar County28073CCounty452019-10-182010-03-02431
Lauderdale County28075CCounty642013-05-162010-02-03640
Lawrence County28077CCounty212011-06-022011-06-02210
Leake County28079CCounty252011-09-162011-09-16250
Lee County28081CCounty642025-11-282010-02-03562
Leflore County28083CCounty532025-01-172012-05-16520
Lincoln County28085CCounty282010-02-032010-02-03280
Lowndes County28087CCounty392025-11-282011-02-18290
Madison County28089CCounty562025-01-172010-03-17310
Marion County28091CCounty212019-10-182011-07-1860
Marshall County28093CCounty302021-05-042011-07-04210
Monroe County28095CCounty712025-11-282019-02-1500
Montgomery County28097CCounty212025-03-112010-09-17190
Neshoba County28099CCounty312010-06-042010-06-04310
Newton County28101CCounty342010-12-172010-12-17340
Noxubee County28103CCounty252011-06-022011-06-02250
Oktibbeha County28105CCounty322010-02-172010-02-17321
Panola County28107CCounty592021-03-232017-05-1601
Pearl River County28109CCounty882019-09-272008-06-03700
Perry County28111CCounty262021-11-192011-12-16190
Pike County28113CCounty232010-06-182010-06-18230
Pontotoc County28115CCounty292010-08-192010-08-19290
Prentiss County28117CCounty372025-11-282011-07-18100
Quitman County28119CCounty362021-05-042017-05-1600
Rankin County28121CCounty1002022-08-162014-06-09762
Scott County28123CCounty312021-07-202010-12-17300
Sharkey County28125CCounty252024-08-142012-03-02220
Simpson County28127CCounty352011-09-022011-09-02350
Smith County28129CCounty262021-07-202011-08-16250
Stone County28131CCounty172011-06-162011-06-16170
Sunflower County28133CCounty502021-03-232012-01-18170
Tallahatchie County28135CCounty392021-03-232017-05-1600
Tate County28137CCounty272021-05-042009-01-02250
Tippah County28139CCounty212010-06-182010-06-18210
Tishomingo County28141CCounty442025-11-282010-12-17290
Tunica County28143CCounty392021-05-042008-10-16330
Union County28145CCounty202010-09-032010-09-03202
Walthall County28147CCounty162019-10-182010-07-06130
Warren County28149CCounty452013-07-162008-11-05451
Washington County28151CCounty522024-08-282012-05-02340
Wayne County28153CCounty282011-07-182011-07-18280
Webster County28155CCounty252010-01-062010-01-06250
Wilkinson County28157CCounty242010-04-192010-04-19240
Winston County28159CCounty292010-09-172010-09-17290
Yalobusha County28161CCounty202021-03-232010-09-17140
Yazoo County28163CCounty452025-01-312012-02-16400
Dates are panel effective dates (YYYY-MM-DD). "Placeholder" means FEMA's record carries a non-date such as 9999-09-09. "Over 10 years old" counts panels effective before September 29, 2016. "LOMRs in effect" are Letters of Map Revision not yet folded into a new FIRM. The DFIRM ID appears in responses as flood_zone.dfirm_id and firm_panel.dfirm_id.

Source: FEMA NFHL layers 1, 3 and 22 and the Census Bureau county gazetteer, computed September 29, 2026. All states ยท API reference