Polk County, IA parcel and infrastructure data API

Parcel coverage in Polk County

About 210,000 parcel records with boundaries, situs addresses and parcel numbers, with the latest source update from October 2026. Each record has a stable korzy_id you can store and look up again with /api/parcel-record. Share of records with each field:

Owner name and mailing address are returned with include_owner=true, which doubles a request's cost: a parcel record costs 2 credits instead of 1. 1% of Polk County records carry an owner name.

Infrastructure in and around Polk County

Example requests for Polk County

Real responses from the production API, trimmed to the main fields. Every request needs an API key with api:read; see authentication and credits and limits.

1. Find a parcel by address

/api/search matches 3540 SW 61ST STREET, DES MOINES, IA and returns the parcel's korzy_id, coordinates and record. 1 credit.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'q=3540 SW 61ST STREET, DES MOINES, IA' \
  https://api.korzy.co/api/search

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/search",
    params={"q": "3540 SW 61ST STREET, DES MOINES, IA"},
    headers={"Authorization": f"Bearer {os.environ['KORZY_API_KEY']}"},
    timeout=30,
)
response.raise_for_status()
parcel = response.json()["results"][0]
print(parcel["korzy_id"], parcel["longitude"], parcel["latitude"])

{
  "results": [
    {
      "korzy_id": "19153-29c3ed00e0062115961a",
      "address": "3540 SW 61ST STREET",
      "city": "DES MOINES",
      "postcode": "50321",
      "county": "Polk",
      "statefp": "19",
      "longitude": -93.69993209986907,
      "latitude": 41.5503056,
      "match_type": "exact",
      "parcelid": "77-782523620007",
      "parceladdr": "3540 SW 61ST STREET",
      "parcelcity": "DES MOINES",
      "situs_zip": "50321",
      "geoid": "19153"
    }
  ],
  "truncated": false
}

With include_owner=true (2 credits) the record adds owner fields, shown here as placeholders:

{
  "owner_name": "EXAMPLE HOLDINGS LLC",
  "owner_mailing_address": "100 EXAMPLE ST, SAMPLE CITY, ST 00000"
}

2. Look up the parcel at a point

/api/query/point returns every parcel whose boundary covers the coordinates; here it returns the same record, 19153-29c3ed00e0062115961a, in records. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-93.699932' \
  --data-urlencode 'latitude=41.550306' \
  --data-urlencode 'limit=5' \
  https://api.korzy.co/api/query/point

const params = new URLSearchParams({"longitude": "-93.699932", "latitude": "41.550306", "limit": "5"});
const response = await fetch(`https://api.korzy.co/api/query/point?${params}`, {
  headers: { Authorization: `Bearer ${process.env.KORZY_API_KEY}` },
});
if (!response.ok) throw new Error(`Korzy API ${response.status}`);
const { records } = await response.json();
console.log(records.map((record) => record.korzy_id));

3. Check nearby data-center projects

/api/datacenters/context lists data-center projects within 10 km of the point, nearest first. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-93.699932' \
  --data-urlencode 'latitude=41.550306' \
  --data-urlencode 'radius_km=10' \
  --data-urlencode 'limit=3' \
  https://api.korzy.co/api/datacenters/context

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/datacenters/context",
    params={"longitude": "-93.699932", "latitude": "41.550306", "radius_km": "10", "limit": "3"},
    headers={"Authorization": f"Bearer {os.environ['KORZY_API_KEY']}"},
    timeout=30,
)
response.raise_for_status()
for project in response.json()["projects"]:
    print(project["name"], project["status"], project["distance_km"])

{
  "projects": [
    {
      "project_id": "dc_b5d6eadd8dd09e88e5f6",
      "name": "Uniti Des Moines Data Center (formerly Windstream Wholesale)",
      "operator": "Uniti",
      "status": "operating",
      "city": "Des Moines",
      "state": "IA",
      "longitude": -93.700416,
      "latitude": 41.552651,
      "location_precision": "exact",
      "distance_km": 0.2638445895659173
    },
    {
      "project_id": "dc_271c23c3457cc974da6e",
      "name": "Microsoft Project Alluvion Data Center",
      "operator": "Microsoft",
      "status": "operating",
      "city": "West Des Moines",
      "state": "IA",
      "longitude": -93.70509523394365,
      "latitude": 41.51672205,
      "location_precision": "footprint",
      "distance_km": 3.7590189948708788
    },
    {
      "project_id": "dc_8f86edbba87c5f079dbb",
      "name": "Microsoft Project Ginger East Data Center",
      "operator": "Microsoft",
      "status": "under_construction",
      "city": "West Des Moines",
      "state": "IA",
      "longitude": -93.7362003,
      "latitude": 41.5193146,
      "location_precision": "approximate",
      "distance_km": 4.581346819436868
    }
  ],
  "radius_km": 10,
  "limit": 3,
  "truncated": true
}

Polk County data questions

How many parcels in Polk County include year built?

About 150,000 of about 210,000 parcel records (73%) include year built.

Does the Korzy API return owner names for Polk County parcels?

Yes. 1% of Polk County parcel records carry an owner name. Add include_owner=true to a point, search or parcel-record request; it doubles the request's cost, so a single parcel record costs 2 credits.

How many data-center projects are in Polk County?

Korzy tracks about 20 data-center projects in Polk County: 10 operating, 6 status not reported and 3 under construction. /api/datacenters/context lists projects within 10 km of any point.

How much power generation is in Polk County?

8 operable power plants in Polk County total about 1,100 MW of nameplate capacity, mainly natural gas, battery and pumped storage and other fuels.

Which water systems serve Polk County?

Service areas of about 35 community water systems cover about 76% of Polk County, and sewer service areas cover about 13%. /api/utilities/context returns the water and sewer matches at a point.

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