Last reviewed and updated: 2026-09-24
Fourteen ZIP codes carry a Marietta, GA address, but only seven of them have residential street delivery: 30008, 30060, 30062, 30064, 30066, 30067 and 30068. The remaining seven, 30006, 30007, 30061, 30063, 30065, 30069 and 30090: are P.O. Box ranges or facility codes with no resident population, including 30063 (Lockheed) and 30069 (Dobbins Air Force Base). We cover every residential ZIP in Marietta and the surrounding Cobb County communities.
Only seven of the fourteen Marietta ZIP codes are places people actually live. Whichever one you are in, the work is the same leak detection in Marietta process, and the leak credit depends on which utility bills you.
The seven residential Marietta ZIP codes
These are the codes with street delivery and an actual resident population. Each has its own page covering the housing era there and the leaks that follow from it.
| ZIP | Area covered | Population | Page |
|---|---|---|---|
| 30008 | South-western Marietta toward the Austell and Powder Springs boundaries | 32,435 | 30008 leak detection |
| 30060 | Central and southern Marietta, including the area around the Square | 39,890 | 30060 leak detection |
| 30062 | Central and eastern Marietta, taking in a large part of East Cobb | 66,889 | 30062 leak detection |
| 30064 | Western Marietta and the approach to West Cobb | 50,568 | 30064 leak detection |
| 30066 | North-eastern Marietta along the Sandy Plains and Canton Road corridors | 62,417 | 30066 leak detection |
| 30067 | Southern Marietta toward Powers Ferry, Delk Road and the I-75 corridor | 47,653 | 30067 leak detection |
| 30068 | East Cobb, including the Walton and Pope school communities | 34,870 | 30068 leak detection |
The seven non-residential Marietta ZIP codes
These codes appear in address lookups and mailing lists, which is why people search for them, but none of them has residential street delivery or a resident population. If your mail comes to one of these, your property still sits inside one of the seven residential codes above, that is the one that describes where your house actually is.
| ZIP | Type | What it actually is |
|---|---|---|
| 30006 | P.O. Box only | No resident population. Mail delivered to boxes at a Marietta post office, not to street addresses. |
| 30007 | P.O. Box only | No resident population. A second Marietta post office box range. |
| 30061 | P.O. Box only | No resident population. Used for box mail rather than street delivery. |
| 30063 | Unique: Lockheed | Assigned to the Lockheed Martin facility. No resident population; any leak work here is commercial or industrial. |
| 30065 | P.O. Box only | No resident population. |
| 30069 | Unique: Dobbins AFB | Assigned to Dobbins Air Force Base. No resident population, and work on the installation runs through its own facilities process. |
| 30090 | Administrative | Listed for Marietta with no resident population; not a street-delivery code. |
Why this matters for a leak. A P.O. Box ZIP tells us nothing about your property. When you call, give us the street address or the residential ZIP, because that is what determines the likely foundation type, the era of the plumbing, and which water utility bills you.
Which water utility bills you
This is the single most useful thing to establish before anything else, because it decides which leak credit process applies after a repair.
- Marietta Power & Water bills customers inside the City of Marietta utility service area. Often a combined electric and water bill.
- Cobb County Water System bills most of the surrounding area, including much of the land that carries a Marietta mailing address.
A Marietta mailing address does not by itself make you a city utility customer. Check the utility name printed on your bill. Cobb County allows a partial leak credit once per rolling 12-month period across no more than two affected months, with proof of repair required; Marietta Power & Water runs its own separate process.
Beyond the Marietta ZIPs
We also cover the surrounding Cobb County communities, Kennesaw, Smyrna, Acworth, Powder Springs, Austell and Mableton, and the named Marietta neighborhoods from the Square out to East and West Cobb.
Frequently asked questions
How many ZIP codes does Marietta, GA have?
Fourteen carry a Marietta address, but only seven have residential street delivery: 30008, 30060, 30062, 30064, 30066, 30067 and 30068. The other seven are P.O. Box ranges or facility codes with no resident population.
Is 30006 a real residential ZIP code in Marietta?
No. 30006 is a P.O. Box only code with no resident population. If your mail comes to a 30006 box, your property itself sits inside one of the seven residential Marietta ZIP codes.
What are the 30063 and 30069 ZIP codes?
30063 is a unique code assigned to the Lockheed Martin facility and 30069 is assigned to Dobbins Air Force Base. Neither has a resident population, so work in those codes is commercial or runs through the installation's own facilities process.
Which Marietta ZIP codes do you cover?
All seven residential ones, 30008, 30060, 30062, 30064, 30066, 30067 and 30068, plus the surrounding Cobb County communities of Kennesaw, Smyrna, Acworth, Powder Springs, Austell and Mableton.
Does my ZIP code tell you anything about my leak?
Quite a lot, actually. The residential ZIP indicates the era most of the housing around you was built, which in turn indicates the likely pipe material: polybutylene, copper under a slab, or older galvanized steel, and the common foundation type, which decides how quickly a leak shows itself.
Am I billed by the city or the county?
Check the utility name printed on your bill. Marietta Power & Water serves the City of Marietta utility area; Cobb County Water System serves most of the surrounding area. A Marietta mailing address does not by itself make you a city customer, and the two run separate leak credit processes.