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Polk County, FL parcel and infrastructure data API

Korzy has about 430,000 parcel records for Polk County, Florida, with source updates through August 2026. Nearly every record carries owner names, values and land use; 69% include year built and 69% include building size. In and around the county the API also maps about 30 power plants with about 6,700 MW of capacity, led by natural gas; 4 data-center projects (1 operating); and about 330 miles of active rail. Look up any parcel by address or coordinates, then check water, sewer and infrastructure context at the same point.

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Parcel coverage in Polk County

About 430,000 parcel records with boundaries, situs addresses and parcel numbers, with the latest source update from August 2026. Each record has a stable korzy_id you can store and look up again with /v1/records/{id}. Share of records with each field:

FieldCoverageShare
Situs addressNearly all · 100%
Owner nameNearly all · 99%
Assessed or market valueNearly all · 99%
Year builtMany · 69%
Building sizeMany · 69%
Last saleSome · 15%
Land useNearly all · 99%
ZoningNot published

Owner name and mailing address are returned by /v1/enrich with the owner group, at 2 credits per parcel instead of 1 credit. 99% of Polk County records carry an owner name.

Infrastructure in and around Polk County

Power plants

About 30 operable plants with about 6,700 MW of nameplate capacity; largest by capacity: natural gas, battery and pumped storage, solar. Proposed generators add about 190 MW.

Within 50 km: /v1/lookup section power; details: /v1/records/{id}

Substations and transmission

About 150 in-service substations, about 30 rated 230 kV or higher.

About 900 miles of transmission lines: about 390 mi at under 100 kV; about 10 mi at 100–161 kV; about 440 mi at 220–287 kV; 7 mi at 500 kV.

Water and sewer service

Service areas of about 130 community water systems cover about 44% of the county.

Sewer service areas of about 30 systems cover about 34%.

At an address or point: /v1/lookup section utilities

Data-center projects

4 tracked projects: 1 operating, 2 proposed, 1 status not reported. Reported planned capacity: about 1,600 MW.

Within 10 km: /v1/lookup section datacenters

Flood zones and wetlands

Special flood hazard areas cover about 42% of the county on the current federal flood maps, published October 2026.

Mapped wetlands cover about 21%.

At an address or point: /v1/lookup section environment

Rail, ports and freight

  • About 330 miles of active rail, about 210 of it main line
  • About 30 miles of national freight network highway
  • 1 port area with reported cargo tonnage
  • 1 intermodal rail terminal

Within 25 km: /v1/lookup section logistics

Example requests for Polk County

The lookup response is a real production response, trimmed to the main fields. Every request needs an API key with api:read; see authentication and credits and limits.

1. Find a parcel and its water and sewer service

/v1/lookup matches 2550 DUNDEE RD, WINTER HAVEN, FL and returns the parcel's korzy_id and record, plus the water and sewer service areas at the parcel and the nearest treatment plants. 2 credits.

curl --fail-with-body -sS \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"address":"2550 DUNDEE RD, WINTER HAVEN, FL","sections":["utilities"]}' \
  https://api.korzy.co/v1/lookup
Python
import os
import requests

response = requests.post(
    "https://api.korzy.co/v1/lookup",
    json={"address": "2550 DUNDEE RD, WINTER HAVEN, FL", "sections": ["utilities"]},
    headers={"Authorization": f"Bearer {os.environ['KORZY_API_KEY']}"},
    timeout=60,
)
response.raise_for_status()
body = response.json()
parcel = body["parcels"]["records"][0]
print(parcel["korzy_id"], body["sections"]["utilities"]["status"])
Production response (trimmed)
{
  "location": {
    "longitude": -81.68332232493074,
    "latitude": 28.0218941,
    "address": "2550 DUNDEE RD, WINTER HAVEN",
    "match_type": "exact"
  },
  "parcels": {
    "records": [
      {
        "id": "12105-1f36f5a3fe2fcd1abd8d",
        "korzy_id": "12105-1f36f5a3fe2fcd1abd8d",
        "parcelid": "12-105-262826000000014070",
        "parceladdr": "2550 DUNDEE RD",
        "parcelcity": "WINTER HAVEN",
        "situs_zip": "33884",
        "statefp": "12",
        "geoid": "12105",
        "longitude": -81.68332232493074,
        "latitude": 28.0218941,
        "usedesc": "AUTO SALES,AUTO REPAIR AND STORAGE,AUTO SERVICE SHOPS,BODY AND FENDER SHOPS,COMMERCIAL GARAGES",
        "land_use_code": "027",
        "yearbuilt": 1984,
        "building_count": 2,
        "taxacres": 1.9466942148760331,
        "land_value_usd": 254391,
        "assessed_value_usd": 472954,
        "market_value_usd": 588799,
        "saledate": "2024-03-09",
        "updated": "2026-01-01"
      }
    ],
    "truncated": false
  },
  "sections": {
    "utilities": {
      "status": "ok",
      "data": {
        "water": [
          {
            "id": "utility:water:40919",
            "feature_id": "water:40919",
            "name": "WINTER HAVEN WATER DEPARTMENT",
            "boundary_basis": "System Sourced"
          }
        ],
        "sewer": [
          {
            "id": "utility:sewer:5125",
            "feature_id": "sewer:5125",
            "name": "WINTER HAVEN WWTP#3",
            "boundary_basis": "Modeled"
          }
        ],
        "treatment_plants": [
          {
            "id": "utility:treatment:949",
            "feature_id": "treatment:949",
            "name": "WINTER HAVEN WWTP #2",
            "distance_km": 5.674359899510473
          },
          {
            "id": "utility:treatment:950",
            "feature_id": "treatment:950",
            "name": "WINTER HAVEN WWTP#3",
            "distance_km": 8.090519042353131
          },
          {
            "id": "utility:treatment:14617",
            "feature_id": "treatment:14617",
            "name": "Waverly WWTF",
            "distance_km": 8.101358580448336
          }
        ],
        "truncated": {
          "water": false,
          "sewer": false
        }
      },
      "provenance": [
        {
          "dataset": "water",
          "data_version": "63b7c1c3-9661-4fed-a59f-ddbfff80c2e4"
        },
        {
          "dataset": "sewer",
          "data_version": "63b7c1c3-9661-4fed-a59f-ddbfff80c2e4"
        },
        {
          "dataset": "treatment",
          "data_version": "63b7c1c3-9661-4fed-a59f-ddbfff80c2e4"
        }
      ]
    }
  },
  "credits": {
    "charged": 2,
    "refunded": 0
  }
}

2. Add owner and sale fields

/v1/enrich returns the fields you choose for up to 25 parcels per request; here the parcel 12105-1f36f5a3fe2fcd1abd8d, with the owner group. 2 credits.

curl --fail-with-body -sS \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"items":[{"korzy_id":"12105-1f36f5a3fe2fcd1abd8d"}],"fields":["identity","sale","owner"]}' \
  https://api.korzy.co/v1/enrich

3. Fetch the record again by ID

/v1/records/{id} returns the stored parcel's full record, without owner fields. 1 credit.

curl --fail-with-body -sS \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  https://api.korzy.co/v1/records/12105-1f36f5a3fe2fcd1abd8d
JavaScript
const response = await fetch(`https://api.korzy.co/v1/records/${encodeURIComponent("12105-1f36f5a3fe2fcd1abd8d")}`, {
  headers: { Authorization: `Bearer ${process.env.KORZY_API_KEY}` },
});
if (!response.ok) throw new Error(`Korzy API ${response.status}`);
const { record } = await response.json();
console.log(record.parceladdr, record.usedesc);

Polk County data questions

How many parcels in Polk County include year built?
About 300,000 of about 430,000 parcel records (69%) include year built.
Does the Korzy API return owner names for Polk County parcels?
Yes. 99% of Polk County parcel records carry an owner name. Ask /v1/enrich for the owner group; each parcel then costs 2 credits instead of 1 credit. Lookups and records never include owner fields.
How many data-center projects are in Polk County?
Korzy tracks 4 data-center projects in Polk County: 2 proposed, 1 operating and 1 status not reported. A /v1/lookup with the datacenters section lists projects within 10 km of any address or point.
How much power generation is in Polk County?
About 30 operable power plants in Polk County total about 6,700 MW of nameplate capacity, mainly natural gas, battery and pumped storage and solar.
Which water systems serve Polk County?
Service areas of about 130 community water systems cover about 44% of Polk County, and sewer service areas cover about 34%. A /v1/lookup with the utilities section returns the water and sewer matches at an address or point.

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Build on Polk County parcel data

Lookups, enrichment and records work the same in every county Korzy covers. Credits are shared across parcels, utilities, environment, logistics, power, grid, data-center and terrain sections.

Get an API keySee pricingAPI referenceUse cases for parcel and infrastructure data