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Cobb County, GA parcel and infrastructure data API

Korzy has about 310,000 parcel records for Cobb County, Georgia, with source updates through October 2026. 83% include owner names and 83% include values. In and around the county the API also maps 3 power plants with about 2,900 MW of capacity, led by natural gas; 4 data-center projects (1 operating); and about 80 miles of active rail. Look up any parcel by address or coordinates, then check water, sewer and infrastructure context at the same point.

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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 /v1/records/{id}. Share of records with each field:

FieldCoverageShare
Situs addressNearly all · 100%
Owner nameMost · 83%
Assessed or market valueMost · 83%
Year builtNot published
Building sizeNot published
Last saleNot published
Land useMost · 83%
ZoningNot published

Owner name and mailing address are returned by /v1/enrich with the owner group, at 2 credits per parcel instead of 1 credit. 83% of Cobb County records carry an owner name.

Infrastructure in and around Cobb County

Power plants

3 operable plants with about 2,900 MW of nameplate capacity; largest by capacity: natural gas, battery and pumped storage, oil. Proposed generators add 6 MW.

Within 50 km: /v1/lookup section power; details: /v1/records/{id}

Substations and transmission

About 100 in-service substations, about 20 rated 230 kV or higher.

About 340 miles of transmission lines: about 150 mi at 100–161 kV; about 120 mi at 220–287 kV; about 30 mi at 500 kV.

Water and sewer service

Service areas of about 10 community water systems cover about 98% of the county.

Sewer service areas of about 15 systems cover about 91%.

At an address or point: /v1/lookup section utilities

Data-center projects

4 tracked projects: 1 operating, 2 permitted, 1 status not reported. Reported planned capacity: about 20 MW.

Within 10 km: /v1/lookup section datacenters

Flood zones and wetlands

Special flood hazard areas cover about 10% of the county on the current federal flood maps, published September 2026.

Mapped wetlands cover about 2%.

At an address or point: /v1/lookup section environment

Rail, ports and freight

  • About 80 miles of active rail, about 55 of it main line
  • About 40 miles of national freight network highway
  • 1 intermodal rail terminal

Within 25 km: /v1/lookup section logistics

Example requests for Cobb 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 its water and sewer service

/v1/lookup matches 39 TRAMMELL ST, MARIETTA, GA and returns the parcel's korzy_id and record, plus the water and sewer service areas at the parcel and the nearest treatment plants. 2 credits.

curl --fail-with-body -sS \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"address":"39 TRAMMELL ST, MARIETTA, GA","sections":["utilities"]}' \
  https://api.korzy.co/v1/lookup
Python
import os
import requests

response = requests.post(
    "https://api.korzy.co/v1/lookup",
    json={"address": "39 TRAMMELL ST, MARIETTA, GA", "sections": ["utilities"]},
    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"]["utilities"]["status"])
Production response (trimmed)
{
  "location": {
    "longitude": -84.55253079943371,
    "latitude": 33.9478249679054,
    "address": "39 TRAMMELL ST, MARIETTA",
    "match_type": "exact"
  },
  "parcels": {
    "records": [
      {
        "id": "13067-99f64dc2903a6ab50af7",
        "korzy_id": "13067-99f64dc2903a6ab50af7",
        "parcelid": "16129000010",
        "parceladdr": "39 TRAMMELL ST",
        "parcelcity": "MARIETTA",
        "situs_zip": "30064",
        "statefp": "13",
        "geoid": "13067",
        "longitude": -84.55253079943371,
        "latitude": 33.9478249679054,
        "land_use_code": "C4",
        "taxacres": 2.49,
        "assessed_value_usd": 840000,
        "market_value_usd": 2100000,
        "updated": "2026-10-30"
      }
    ],
    "truncated": false
  },
  "sections": {
    "utilities": {
      "status": "ok",
      "data": {
        "water": [
          {
            "id": "utility:water:40970",
            "feature_id": "water:40970",
            "name": "MARIETTA BOARD OF LIGHTS AND WATER",
            "boundary_basis": "System Sourced"
          }
        ],
        "sewer": [
          {
            "id": "utility:sewer:5323",
            "feature_id": "sewer:5323",
            "name": "Cobb County Sutton WPCP",
            "boundary_basis": "Modeled"
          }
        ],
        "treatment_plants": [
          {
            "id": "utility:treatment:3130",
            "feature_id": "treatment:3130",
            "name": "Cobb Noonday Creek WPCP",
            "distance_km": 14.04002667119924
          },
          {
            "id": "utility:treatment:3131",
            "feature_id": "treatment:3131",
            "name": "Cobb County Northwest WPCP",
            "distance_km": 14.44824460532269
          },
          {
            "id": "utility:treatment:3129",
            "feature_id": "treatment:3129",
            "name": "Cobb County Sutton WPCP",
            "distance_km": 15.82584075534323
          }
        ],
        "truncated": {
          "water": false,
          "sewer": false
        }
      },
      "provenance": [
        {
          "dataset": "water",
          "data_version": "63b7c1c3-9661-4fed-a59f-ddbfff80c2e4"
        },
        {
          "dataset": "sewer",
          "data_version": "63b7c1c3-9661-4fed-a59f-ddbfff80c2e4"
        },
        {
          "dataset": "treatment",
          "data_version": "63b7c1c3-9661-4fed-a59f-ddbfff80c2e4"
        }
      ]
    }
  },
  "credits": {
    "charged": 2,
    "refunded": 0
  }
}

2. Add owner and sale fields

/v1/enrich returns the fields you choose for up to 25 parcels per request; here the parcel 13067-99f64dc2903a6ab50af7, with the owner group. 2 credits.

curl --fail-with-body -sS \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"items":[{"korzy_id":"13067-99f64dc2903a6ab50af7"}],"fields":["identity","sale","owner"]}' \
  https://api.korzy.co/v1/enrich

3. 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 $KORZY_API_KEY" \
  https://api.korzy.co/v1/records/13067-99f64dc2903a6ab50af7
JavaScript
const response = await fetch(`https://api.korzy.co/v1/records/${encodeURIComponent("13067-99f64dc2903a6ab50af7")}`, {
  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);

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. Ask /v1/enrich for the owner group; each parcel then costs 2 credits instead of 1 credit. Lookups and records never include owner fields.
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. A /v1/lookup with the datacenters section lists projects within 10 km of any address or 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%. A /v1/lookup with the utilities section returns the water and sewer matches at an address or point.

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Build on Cobb 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.

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