Johnson County, KS parcel and infrastructure data API
Korzy has about 280,000 parcel records for Johnson County, Kansas, with source updates through June 2026. 83% include values and 83% include year built. In and around the county the API also maps about 10 data-center projects (4 operating and 1 under construction); 2 power plants with about 450 MW of capacity, led by natural gas; and about 110 miles of active rail. Look up any parcel by address or coordinates, then check nearby data-center projects, utilities and grid context at the same point.
Parcel coverage in Johnson County
About 280,000 parcel records with boundaries, situs addresses and parcel numbers, with the latest source update from June 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 · 99% | |
| Owner name | Not published | |
| Assessed or market value | Most · 83% | |
| Year built | Most · 83% | |
| Building size | Not published | |
| Last sale | Not published | |
| Land use | Many · 72% | |
| Zoning | Not published |
Johnson County records do not include owner names. See pricing for credit costs.
Infrastructure in and around Johnson County
Power plants
2 operable plants with about 450 MW of nameplate capacity; largest by capacity: natural gas.
Within 50 km: /v1/lookup section power; details: /v1/records/{id}
Substations and transmission
About 55 in-service substations, 4 rated 230 kV or higher.
About 320 miles of transmission lines: 3 mi at under 100 kV; about 260 mi at 100–161 kV; about 55 mi at 345 kV.
Water and sewer service
Service areas of about 15 community water systems cover about 90% of the county.
Sewer service areas of about 15 systems cover about 43%.
At an address or point: /v1/lookup section utilities
Data-center projects
About 10 tracked projects: 4 operating, 1 under construction, 1 proposed, 5 status not reported. Reported operating capacity: about 15 MW.
Within 10 km: /v1/lookup section datacenters
Flood zones and wetlands
Special flood hazard areas cover about 8% 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 110 miles of active rail, about 85 of it main line
- About 45 miles of national freight network highway
- 1 intermodal rail terminal
Within 25 km: /v1/lookup section logistics
Example requests for Johnson 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 nearby data-center projects
/v1/lookup matches 13742 WEST 119TH STREET, OLATHE, KS and returns the parcel's korzy_id and record, plus the data-center projects within 10 km, nearest first. 2 credits.
curl --fail-with-body -sS \
-H "Authorization: Bearer $KORZY_API_KEY" \
-H "Content-Type: application/json" \
-d '{"address":"13742 WEST 119TH STREET, OLATHE, KS","sections":["datacenters"]}' \
https://api.korzy.co/v1/lookupPython
import os
import requests
response = requests.post(
"https://api.korzy.co/v1/lookup",
json={"address": "13742 WEST 119TH STREET, OLATHE, KS", "sections": ["datacenters"]},
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"]["datacenters"]["status"])Production response (trimmed)
{
"location": {
"longitude": -94.74524883514002,
"latitude": 38.91333570077651,
"address": "13742 WEST 119TH STREET, OLATHE",
"match_type": "exact"
},
"parcels": {
"records": [
{
"id": "20091-0687178840f1306acfe1",
"korzy_id": "20091-0687178840f1306acfe1",
"parcelid": "DP50100000 0005",
"parceladdr": "13742 WEST 119TH STREET",
"parcelcity": "OLATHE",
"situs_zip": "0",
"statefp": "20",
"geoid": "20091",
"longitude": -94.74524883514002,
"latitude": 38.91333570077651,
"usedesc": "SCHOOL",
"yearbuilt": 0,
"totalvalue": 0,
"updated": "2026-06-18"
}
],
"truncated": false
},
"sections": {
"datacenters": {
"status": "ok",
"data": {
"radius_km": 10,
"projects": [
{
"id": "datacenter:dc_baa4421394a4dfc6eb69",
"project_id": "dc_baa4421394a4dfc6eb69",
"name": "Unnamed data center",
"status": "unknown",
"state": "KS",
"city": "Lenexa",
"address": "15725 College Boulevard",
"longitude": -94.7683727750665,
"latitude": 38.926806,
"location_precision": "footprint",
"source_count": 2,
"source_date": "2026-02-09",
"mapped": true,
"distance_km": 2.499104408740069
},
{
"id": "datacenter:dc_ec973b647e9736803564",
"project_id": "dc_ec973b647e9736803564",
"name": "DataBank MCI3 South Lake Campus Data Center",
"operator": "DataBank",
"status": "operating",
"state": "KS",
"city": "Lenexa",
"address": "11200 Lakeview Ave",
"longitude": -94.769520334995,
"latitude": 38.925685125075,
"location_precision": "approximate",
"operational_mw": 12.75,
"source_count": 1,
"source_date": "2026-10-04",
"mapped": true,
"distance_km": 2.5089497726802548
},
{
"id": "datacenter:dc_f5acf4b91c42f4c36b4d",
"project_id": "dc_f5acf4b91c42f4c36b4d",
"name": "Data Center Lenexa",
"status": "unknown",
"state": "KS",
"city": "Lenexa",
"address": "11200 Lakeview Avenue",
"longitude": -94.77031752317828,
"latitude": 38.9251702,
"location_precision": "footprint",
"source_count": 2,
"source_date": "2026-02-09",
"mapped": true,
"distance_km": 2.536785784407295
}
],
"truncated": true,
"note": "Straight-line distance to the reported project point; inspect location_precision. Projects merge supported source matches, not every nearby building. Approximate locations do not identify a parcel. Reported IT load, facility power, planned capacity and estimates remain separate source claims. No record or unknown status does not establish absence or inactivity."
},
"provenance": [
{
"dataset": "datacenters",
"as_of": "2026-11-02",
"data_version": "20261102T123021962884Z"
}
]
}
},
"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 20091-0687178840f1306acfe1. 1 credit.
curl --fail-with-body -sS \
-H "Authorization: Bearer $KORZY_API_KEY" \
-H "Content-Type: application/json" \
-d '{"items":[{"korzy_id":"20091-0687178840f1306acfe1"}],"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 $KORZY_API_KEY" \
https://api.korzy.co/v1/records/20091-0687178840f1306acfe1JavaScript
const response = await fetch(`https://api.korzy.co/v1/records/${encodeURIComponent("20091-0687178840f1306acfe1")}`, {
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);Johnson County data questions
- How many parcels in Johnson County include year built?
- About 230,000 of about 280,000 parcel records (83%) include year built.
- Does the Korzy API return owner names for Johnson County parcels?
- Johnson 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 Johnson County?
- Korzy tracks about 10 data-center projects in Johnson County: 5 status not reported, 4 operating and 1 under construction. A /v1/lookup with the datacenters section lists projects within 10 km of any address or point.
- How much power generation is in Johnson County?
- 2 operable power plants in Johnson County total about 450 MW of nameplate capacity, mainly natural gas.
- Which water systems serve Johnson County?
- Service areas of about 15 community water systems cover about 90% of Johnson County, and sewer service areas cover about 43%. A /v1/lookup with the utilities section returns the water and sewer matches at an address or point.
More featured counties
- Jackson County, MOBorders Johnson County · about 300,000 parcels
Build on Johnson 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.