Marion County, IN parcel and infrastructure data API
Korzy has about 380,000 parcel records for Marion County, Indiana, with source updates through August 2026. Nearly every record carries land use; 80% include building size and 79% include values. In and around the county the API also maps about 25 power plants with about 1,500 MW of capacity, led by natural gas; 3 data-center projects; and about 210 miles of active rail. Look up any parcel by address or coordinates, then check water, sewer and infrastructure context at the same point.
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 /v1/records/{id}. Share of records with each field:
| Field | Coverage | Share |
|---|---|---|
| Situs address | Nearly all · 100% | |
| Owner name | Not published | |
| Assessed or market value | Most · 79% | |
| Year built | Not published | |
| Building size | Most · 80% | |
| Last sale | Not published | |
| Land use | Nearly all · 95% | |
| Zoning | Not published |
Marion County records do not include owner names. See pricing for credit costs.
Infrastructure in and around Marion County
Power plants
About 25 operable plants with about 1,500 MW of nameplate capacity; largest by capacity: natural gas, solar, oil.
Within 50 km: /v1/lookup section power; details: /v1/records/{id}
Substations and transmission
About 100 in-service substations, 7 rated 230 kV or higher.
About 500 miles of transmission lines: about 10 mi at under 100 kV; about 390 mi at 100–161 kV; about 15 mi at 220–287 kV; about 75 mi at 345 kV.
Water and sewer service
Service areas of 7 community water systems cover about 98% of the county.
Sewer service areas of about 10 systems cover about 97%.
At an address or point: /v1/lookup section utilities
Data-center projects
3 tracked projects: 3 permitted. Reported planned capacity: about 400 MW.
Within 10 km: /v1/lookup section datacenters
Flood zones and wetlands
Special flood hazard areas cover about 13% of the county on the current federal flood maps, published October 2026.
Mapped wetlands cover about 1%.
At an address or point: /v1/lookup section environment
Rail, ports and freight
- About 210 miles of active rail, about 110 of it main line
- About 120 miles of national freight network highway
- 1 intermodal rail terminal
Within 25 km: /v1/lookup section logistics
Example requests for Marion 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 1602 LUDLOW AVE, INDIANAPOLIS, IN 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":"1602 LUDLOW AVE, INDIANAPOLIS, IN","sections":["utilities"]}' \
https://api.korzy.co/v1/lookupPython
import os
import requests
response = requests.post(
"https://api.korzy.co/v1/lookup",
json={"address": "1602 LUDLOW AVE, INDIANAPOLIS, IN", "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": -86.13017785725215,
"latitude": 39.78786975,
"address": "1602 LUDLOW AVE, INDIANAPOLIS",
"match_type": "exact"
},
"parcels": {
"records": [
{
"id": "18097-c65d6eabc9d2961f9b0c",
"korzy_id": "18097-c65d6eabc9d2961f9b0c",
"parcelid": "49-07-31-198-170 000-101",
"parceladdr": "1602 LUDLOW AVE",
"parcelcity": "INDIANAPOLIS",
"situs_zip": "46201",
"statefp": "18",
"geoid": "18097",
"longitude": -86.13017785725215,
"latitude": 39.78786975,
"usedesc": "OTHER INDUSTRIAL STRUCTURES-399",
"land_use_code": "399",
"bldgsqft": 119215,
"taxacres": 2.097,
"totalvalue": 779700,
"updated": "2025-08-24"
}
],
"truncated": false
},
"sections": {
"utilities": {
"status": "ok",
"data": {
"water": [
{
"id": "utility:water:25714",
"feature_id": "water:25714",
"name": "CITIZENS WATER - INDIANAPOLIS",
"boundary_basis": "System Sourced"
}
],
"sewer": [
{
"id": "utility:sewer:6548",
"feature_id": "sewer:6548",
"name": "City of Indianapolis",
"boundary_basis": "Modeled"
}
],
"treatment_plants": [
{
"id": "utility:treatment:13182",
"feature_id": "treatment:13182",
"name": "City of Indianapolis",
"distance_km": 5.848970954899487
},
{
"id": "utility:treatment:4323",
"feature_id": "treatment:4323",
"name": "BEN DAVIS CD",
"distance_km": 7.621638096928187
},
{
"id": "utility:treatment:4058",
"feature_id": "treatment:4058",
"name": "SPEEDWAY, TOWN OF",
"distance_km": 9.055450156081564
}
],
"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 value and sale fields
/v1/enrich returns the fields you choose for up to 25 parcels per request; here the parcel 18097-c65d6eabc9d2961f9b0c. 1 credit.
curl --fail-with-body -sS \
-H "Authorization: Bearer $KORZY_API_KEY" \
-H "Content-Type: application/json" \
-d '{"items":[{"korzy_id":"18097-c65d6eabc9d2961f9b0c"}],"fields":["identity","value","sale"]}' \
https://api.korzy.co/v1/enrich3. 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 $KORZY_API_KEY" \
https://api.korzy.co/v1/records/18097-c65d6eabc9d2961f9b0cJavaScript
const response = await fetch(`https://api.korzy.co/v1/records/${encodeURIComponent("18097-c65d6eabc9d2961f9b0c")}`, {
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);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. A /v1/lookup with the datacenters section lists projects within 10 km of any address or 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%. A /v1/lookup with the utilities section returns the water and sewer matches at an address or point.
Build on Marion 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.