Prince William County, VA parcel and infrastructure data API

Parcel coverage in Prince William County

About 160,000 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:

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

Infrastructure in and around Prince William County

Example requests for Prince William 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 12869 GALVESTON CT, Prince William County, VA 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=12869 GALVESTON CT, Prince William County, VA' \
  https://api.korzy.co/api/search

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/search",
    params={"q": "12869 GALVESTON CT, Prince William County, VA"},
    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": "51153-b4728e25a1853a8c9cea",
      "address": "12869 GALVESTON CT",
      "city": "Prince William County",
      "postcode": "20112",
      "county": "Prince William",
      "statefp": "51",
      "longitude": -77.3629436188171,
      "latitude": 38.679333650000004,
      "match_type": "exact",
      "parcelid": "8093-72-5347",
      "parceladdr": "12869 GALVESTON CT",
      "parcelcity": "Prince William County",
      "situs_zip": "20112",
      "usedesc": "Nbhd Shopping Center",
      "bldgsqft": 0,
      "taxacres": 0.9926,
      "saledate": "2008-06-03",
      "updated": "2026-08-03",
      "geoid": "51153"
    }
  ],
  "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, 51153-b4728e25a1853a8c9cea, in records. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-77.362944' \
  --data-urlencode 'latitude=38.679334' \
  --data-urlencode 'limit=5' \
  https://api.korzy.co/api/query/point

const params = new URLSearchParams({"longitude": "-77.362944", "latitude": "38.679334", "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=-77.362944' \
  --data-urlencode 'latitude=38.679334' \
  --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": "-77.362944", "latitude": "38.679334", "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": [],
  "radius_km": 10,
  "limit": 3,
  "truncated": false
}

Prince William County data questions

How many parcels in Prince William County include building size?

About 110,000 of about 160,000 parcel records (69%) include building size.

Does the Korzy API return owner names for Prince William County parcels?

Prince William 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 Prince William County?

Korzy tracks about 65 data-center projects in Prince William County: 50 status not reported, 8 operating and 4 under construction. /api/datacenters/context lists projects within 10 km of any point.

How much power generation is in Prince William County?

4 operable power plants in Prince William County total about 730 MW of nameplate capacity, mainly natural gas, battery and pumped storage and oil.

Which water systems serve Prince William County?

Service areas of about 15 community water systems cover about 35% of Prince William County, and sewer service areas cover about 73%. /api/utilities/context returns the water and sewer matches at a point.

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• Fairfax County, VABorders Prince William County · about 370,000 parcels
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