Which ZIP code in Cobb County has the highest median age?

30068 (Marietta), at 44.0 (±2.0), among 19 ZIP codes with at least 1,000 residents.

Why are some ZIP codes missing?

ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

Oldest ZIP codes in Cobb County, GA

These are the 19 ZIP codes in Cobb County with the highest median age, out of 19 with at least 1,000 residents. 30068 (Marietta, 44.0), 30075 (Roswell, 43.1) and 30127 (Powder Springs, 41.9) lead the list. There is no single "best" ZIP code in Cobb County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Oldest ZIP codes in Cobb County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	30068	Marietta	44.0 ±2.0	33,882	12,849	13,016
2	30075	Roswell	43.1 ±1.5	56,263	21,548	22,251
3	30127	Powder Springs	41.9 ±1.7	71,626	24,431	25,730
4	30062	Marietta	41.2 ±1.1	62,284	23,211	25,054
5	30152	Kennesaw	41.1 ±1.2	44,977	16,541	17,422
6	30064	Marietta	40.8 ±1.6	52,125	18,771	20,262
7	30126	Mableton	39.6 ±1.7	41,829	15,853	17,909
8	30101	Acworth	39.2 ±1.6	62,593	21,672	23,857
9	30066	Marietta	38.8 ±1.4	61,761	22,852	23,160
10	30106	Austell	38.6 ±2.0	23,107	9,401	9,540
11	30102	Acworth	37.0 ±1.8	45,319	15,561	18,932
12	30082	Smyrna	37.0 ±1.2	27,296	11,050	12,175
13	30080	Smyrna	35.1 ±1.2	53,316	24,950	26,919
14	30008	Marietta	34.1 ±1.6	35,547	11,705	12,242
15	30339	Atlanta	34.0 ±1.4	35,372	19,910	21,221
16	30067	Marietta	33.1 ±0.9	47,271	19,463	21,519
17	30168	Austell	32.7 ±2.2	26,612	9,304	10,343
18	30144	Kennesaw	32.6 ±1.2	59,661	21,979	23,416
19	30060	Marietta	30.9 ±1.2	38,499	12,963	14,508

How we ranked them

Ranked by median age of all residents, highest first (ACS 5-year estimates, 2020–2024). ZIP codes need at least 1,000 residents to be ranked; 19 of 21 qualify.

Which of these to mail, and why

Older ZIP codes respond to health care, hearing and vision, Medicare plans, home safety, estate planning and services that come to the door.

The top five ZIP codes on this list hold 98,580 households, on 171 carrier routes with 103,473 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 30068 on the EDDM route map

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Businesses that mail these ZIP codes

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Frequently asked questions

Which ZIP code in Cobb County has the highest median age?: 30068 (Marietta), at 44.0 (±2.0), among 19 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median age of all residents, highest first (ACS 5-year estimates, 2020–2024).
Why are some ZIP codes missing?: ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.