Butler County, OH parcel and infrastructure data API

Parcel coverage in Butler County

About 170,000 parcel records with boundaries, situs addresses and parcel numbers, with the latest source update from November 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:

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

Infrastructure in and around Butler County

Example requests for Butler 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 312 CLEVELAND AVE, HAMILTON, OH 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=312 CLEVELAND AVE, HAMILTON, OH' \
  https://api.korzy.co/api/search

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/search",
    params={"q": "312 CLEVELAND AVE, HAMILTON, OH"},
    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": "39017-ffd3b0abeefc2bed305b",
      "address": "312 CLEVELAND AVE HAMILTON 45013",
      "city": "HAMILTON",
      "postcode": "45013",
      "county": "Butler",
      "statefp": "39",
      "longitude": -84.56767500413793,
      "latitude": 39.4079213,
      "match_type": "exact",
      "parcelid": "39017-P6411014000125",
      "parceladdr": "312 CLEVELAND AVE HAMILTON 45013",
      "parcelcity": "HAMILTON",
      "situs_zip": "45013",
      "usedesc": "685: Exm-Public Woship",
      "yearbuilt": 1927,
      "bldgsqft": 6186,
      "taxacres": 0,
      "updated": "2023-08-29",
      "geoid": "39017"
    }
  ],
  "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, 39017-ffd3b0abeefc2bed305b, in records. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-84.567675' \
  --data-urlencode 'latitude=39.407921' \
  --data-urlencode 'limit=5' \
  https://api.korzy.co/api/query/point

const params = new URLSearchParams({"longitude": "-84.567675", "latitude": "39.407921", "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=-84.567675' \
  --data-urlencode 'latitude=39.407921' \
  --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": "-84.567675", "latitude": "39.407921", "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_81e791bd3dc24a3e05e1",
      "name": "Hamilton Innovation Center",
      "operator": "Logistix Property Group",
      "status": "proposed",
      "city": "Hamilton",
      "state": "OH",
      "longitude": -84.5613,
      "latitude": 39.3995,
      "location_precision": "approximate",
      "distance_km": 1.084809732779438
    },
    {
      "project_id": "dc_778bcc3f3340876110c9",
      "name": "CyrusOne Cincinnati-Hamilton CIN4",
      "operator": "CyrusOne",
      "status": "unknown",
      "state": "OH",
      "longitude": -84.56589096932771,
      "latitude": 39.3847186,
      "location_precision": "footprint",
      "distance_km": 2.58454313250437
    }
  ],
  "radius_km": 10,
  "limit": 3,
  "truncated": false
}

Butler County data questions

How many parcels in Butler County include year built?

About 120,000 of about 170,000 parcel records (73%) include year built.

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

Butler 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 Butler County?

Korzy tracks 5 data-center projects in Butler County: 2 proposed, 1 operating and 1 permitted. /api/datacenters/context lists projects within 10 km of any point.

How much power generation is in Butler County?

8 operable power plants in Butler County total about 2,100 MW of nameplate capacity, mainly natural gas, battery and pumped storage and other fuels.

Which water systems serve Butler County?

Service areas of about 15 community water systems cover about 89% of Butler County, and sewer service areas cover about 33%. /api/utilities/context returns the water and sewer matches at a point.

More featured counties

• Hamilton County, OHBorders Butler County · about 420,000 parcels
• Franklin County, OHabout 500,000 parcels
• Cuyahoga County, OHabout 520,000 parcels

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