Cobb County, GA parcel and infrastructure data API

Parcel coverage in Cobb County

About 310,000 parcel records with boundaries, situs addresses and parcel numbers, with the latest source update from October 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:

Owner name and mailing address are returned with include_owner=true, which doubles a request's cost: a parcel record costs 2 credits instead of 1. 83% of Cobb County records carry an owner name.

Infrastructure in and around Cobb County

Example requests for Cobb 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 39 TRAMMELL ST, MARIETTA, GA 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=39 TRAMMELL ST, MARIETTA, GA' \
  https://api.korzy.co/api/search

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/search",
    params={"q": "39 TRAMMELL ST, MARIETTA, GA"},
    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": "13067-99f64dc2903a6ab50af7",
      "address": "39 TRAMMELL ST",
      "city": "MARIETTA",
      "postcode": "30064",
      "county": "Cobb",
      "statefp": "13",
      "longitude": -84.55253079943371,
      "latitude": 33.9478249679054,
      "match_type": "exact",
      "parcelid": "16129000010",
      "parceladdr": "39 TRAMMELL ST",
      "parcelcity": "MARIETTA",
      "situs_zip": "30064",
      "land_use_code": "C4",
      "taxacres": 2.49,
      "assessed_value_usd": 840000,
      "market_value_usd": 2100000,
      "updated": "2026-10-30",
      "geoid": "13067"
    }
  ],
  "truncated": false
}

With include_owner=true (2 credits) the record adds owner fields, shown here as placeholders:

{
  "owner_name": "EXAMPLE HOLDINGS LLC",
  "owner_mailing_address": "100 EXAMPLE ST, SAMPLE CITY, ST 00000"
}

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, 13067-99f64dc2903a6ab50af7, in records. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-84.552531' \
  --data-urlencode 'latitude=33.947825' \
  --data-urlencode 'limit=5' \
  https://api.korzy.co/api/query/point

const params = new URLSearchParams({"longitude": "-84.552531", "latitude": "33.947825", "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=-84.552531' \
  --data-urlencode 'latitude=33.947825' \
  https://api.korzy.co/api/utilities/context

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/utilities/context",
    params={"longitude": "-84.552531", "latitude": "33.947825"},
    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": -84.552531,
  "latitude": 33.947825,
  "matches": {
    "water": [
      {
        "feature_id": "water:40970",
        "name": "MARIETTA BOARD OF LIGHTS AND WATER",
        "boundary_basis": "System Sourced"
      }
    ],
    "sewer": [
      {
        "feature_id": "sewer:5323",
        "name": "Cobb County Sutton WPCP",
        "boundary_basis": "Modeled"
      }
    ]
  },
  "nearby_treatment": [
    {
      "feature_id": "treatment:3130",
      "name": "Cobb Noonday Creek WPCP",
      "distance_km": 14.040024894093039
    },
    {
      "feature_id": "treatment:3131",
      "name": "Cobb County Northwest WPCP",
      "distance_km": 14.44822960863332
    }
  ]
}

Cobb County data questions

How many parcels in Cobb County include values?

About 260,000 of about 310,000 parcel records (83%) include values.

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

Yes. 83% of Cobb County parcel records carry an owner name. Add include_owner=true to a point, search or parcel-record request; it doubles the request's cost, so a single parcel record costs 2 credits.

How many data-center projects are in Cobb County?

Korzy tracks 4 data-center projects in Cobb County: 2 permitted, 1 operating and 1 status not reported. /api/datacenters/context lists projects within 10 km of any point.

How much power generation is in Cobb County?

3 operable power plants in Cobb County total about 2,900 MW of nameplate capacity, mainly natural gas, battery and pumped storage and oil.

Which water systems serve Cobb County?

Service areas of about 10 community water systems cover about 98% of Cobb County, and sewer service areas cover about 91%. /api/utilities/context returns the water and sewer matches at a point.

More featured counties

• Bartow County, GABorders Cobb County · about 52,000 parcels
• Fulton County, GABorders Cobb County · about 370,000 parcels
• Columbia County, GAabout 68,000 parcels
• Clayton County, GAabout 91,000 parcels

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