Marion County, IN parcel and infrastructure data API

Parcel coverage in Marion County

About 380,000 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 /api/parcel-record. Share of records with each field:

Marion County records do not include owner names. See pricing for credit costs.

Infrastructure in and around Marion County

Example requests for Marion 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 1602 LUDLOW AVE, INDIANAPOLIS, IN 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=1602 LUDLOW AVE, INDIANAPOLIS, IN' \
  https://api.korzy.co/api/search

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/search",
    params={"q": "1602 LUDLOW AVE, INDIANAPOLIS, IN"},
    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": "18097-c65d6eabc9d2961f9b0c",
      "address": "1602 LUDLOW AVE",
      "city": "INDIANAPOLIS",
      "postcode": "46201",
      "county": "Marion",
      "statefp": "18",
      "longitude": -86.13017785725215,
      "latitude": 39.78786975,
      "match_type": "exact",
      "parcelid": "49-07-31-198-170 000-101",
      "parceladdr": "1602 LUDLOW AVE",
      "parcelcity": "INDIANAPOLIS",
      "situs_zip": "46201",
      "usedesc": "OTHER INDUSTRIAL STRUCTURES-399",
      "land_use_code": "399",
      "bldgsqft": 119215,
      "taxacres": 2.097,
      "totalvalue": 779700,
      "updated": "2025-08-24",
      "geoid": "18097"
    }
  ],
  "truncated": false
}

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, 18097-c65d6eabc9d2961f9b0c, in records. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-86.130178' \
  --data-urlencode 'latitude=39.78787' \
  --data-urlencode 'limit=5' \
  https://api.korzy.co/api/query/point

const params = new URLSearchParams({"longitude": "-86.130178", "latitude": "39.78787", "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 water and sewer service

/api/utilities/context returns the water and sewer service areas at the point and the nearest treatment plants. 1 credit.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-86.130178' \
  --data-urlencode 'latitude=39.78787' \
  https://api.korzy.co/api/utilities/context

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/utilities/context",
    params={"longitude": "-86.130178", "latitude": "39.78787"},
    headers={"Authorization": f"Bearer {os.environ['KORZY_API_KEY']}"},
    timeout=30,
)
response.raise_for_status()
matches = response.json()["matches"]
print([area["name"] for area in matches["water"]])

{
  "longitude": -86.130178,
  "latitude": 39.78787,
  "matches": {
    "water": [
      {
        "feature_id": "water:25714",
        "name": "CITIZENS WATER - INDIANAPOLIS",
        "boundary_basis": "System Sourced"
      }
    ],
    "sewer": [
      {
        "feature_id": "sewer:6548",
        "name": "City of Indianapolis",
        "boundary_basis": "Modeled"
      }
    ]
  },
  "nearby_treatment": [
    {
      "feature_id": "treatment:13182",
      "name": "City of Indianapolis",
      "distance_km": 5.848984538325054
    },
    {
      "feature_id": "treatment:4323",
      "name": "BEN DAVIS CD",
      "distance_km": 7.621668350095775
    }
  ]
}

Marion County data questions

How many parcels in Marion County include building size?

About 300,000 of about 380,000 parcel records (80%) include building size.

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

Marion County parcel records do not include owner names. Values, land use and building facts are returned where the county publishes them.

How many data-center projects are in Marion County?

Korzy tracks 3 data-center projects in Marion County: 3 permitted. /api/datacenters/context lists projects within 10 km of any point.

How much power generation is in Marion County?

About 25 operable power plants in Marion County total about 1,500 MW of nameplate capacity, mainly natural gas, solar and oil.

Which water systems serve Marion County?

Service areas of 7 community water systems cover about 98% of Marion County, and sewer service areas cover about 97%. /api/utilities/context returns the water and sewer matches at a point.