Hampden County, MA parcel and infrastructure data API

Parcel coverage in Hampden County

About 160,000 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:

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

Infrastructure in and around Hampden County

Example requests for Hampden 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 425 ST JAMES AV, SPRINGFIELD, MA 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=425 ST JAMES AV, SPRINGFIELD, MA' \
  https://api.korzy.co/api/search

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/search",
    params={"q": "425 ST JAMES AV, SPRINGFIELD, MA"},
    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": "25013-ab8632b48be9f5e8fd60",
      "address": "425 ST JAMES AV",
      "city": "SPRINGFIELD",
      "postcode": "00000",
      "county": "Hampden",
      "statefp": "25",
      "longitude": -72.56983337486975,
      "latitude": 42.12103035,
      "match_type": "exact",
      "parcelid": "11170-0344",
      "parceladdr": "425 ST JAMES AV",
      "parcelcity": "SPRINGFIELD",
      "situs_zip": "00000",
      "usedesc": "Storage, Warehouses And Distribution",
      "yearbuilt": 1909,
      "bldgsqft": 8436,
      "totalvalue": 552800,
      "saledate": "2007-06-29",
      "saleamt": 180000,
      "updated": "2026-11-03",
      "geoid": "25013"
    }
  ],
  "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, 25013-ab8632b48be9f5e8fd60, in records. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-72.569833' \
  --data-urlencode 'latitude=42.12103' \
  --data-urlencode 'limit=5' \
  https://api.korzy.co/api/query/point

const params = new URLSearchParams({"longitude": "-72.569833", "latitude": "42.12103", "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=-72.569833' \
  --data-urlencode 'latitude=42.12103' \
  https://api.korzy.co/api/utilities/context

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/utilities/context",
    params={"longitude": "-72.569833", "latitude": "42.12103"},
    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": -72.569833,
  "latitude": 42.12103,
  "matches": {
    "water": [
      {
        "feature_id": "water:36303",
        "name": "SPRINGFIELD WATER AND SEWER COMMISSION",
        "boundary_basis": "System Sourced"
      }
    ],
    "sewer": [
      {
        "feature_id": "sewer:888",
        "name": "Springfield Sewerage Collection System and WPCF",
        "boundary_basis": "Sourced"
      }
    ]
  },
  "nearby_treatment": [
    {
      "feature_id": "treatment:2069",
      "name": "Springfield Sewerage Collection System and WPCF",
      "distance_km": 2.7248813035436723
    },
    {
      "feature_id": "treatment:2075",
      "name": "Chicopee Sewerage Collection System and WPCF",
      "distance_km": 5.613826227552228
    }
  ]
}

Hampden County data questions

How many parcels in Hampden County include year built?

About 110,000 of about 160,000 parcel records (69%) include year built.

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

Hampden 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 Hampden County?

Korzy tracks 3 data-center projects in Hampden County: 2 proposed and 1 operating. /api/datacenters/context lists projects within 10 km of any point.

How much power generation is in Hampden County?

About 80 operable power plants in Hampden County total about 1,400 MW of nameplate capacity, mainly natural gas, battery and pumped storage and solar.

Which water systems serve Hampden County?

Service areas of about 35 community water systems cover about 27% of Hampden County, and sewer service areas cover about 22%. /api/utilities/context returns the water and sewer matches at a point.

More featured counties

• Capitol Planning Region, CTBorders Hampden County · about 360,000 parcels
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• Middlesex County, MAabout 530,000 parcels
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• Norfolk County, MAabout 250,000 parcels
• Suffolk County, MAabout 200,000 parcels

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