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

29448 (Harleyville), at 48.1 (±7.9), among 13 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 Dorchester County, SC

These are the 13 ZIP codes in Dorchester County with the highest median age, out of 13 with at least 1,000 residents. 29448 (Harleyville, 48.1), 29426 (Adams Run, 46.8) and 29477 (Saint George, 45.3) lead the list. There is no single "best" ZIP code in Dorchester 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 Dorchester County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	29448	Harleyville	48.1 ±7.9	1,997	844	1,065
2	29426	Adams Run	46.8 ±8.4	1,697	742	699
3	29477	Saint George	45.3 ±5.8	7,176	2,987	3,067
4	29437	Dorchester	42.6 ±5.5	2,281	861	1,118
5	29470	Ravenel	41.7 ±4.1	5,639	2,089	2,687
6	29471	Reevesville	41.2 ±13.4	1,135	516	659
7	29472	Ridgeville	39.7 ±1.9	12,722	3,917	4,291
8	29485	Summerville	38.1 ±1.1	58,507	22,107	27,903
9	29414	Charleston	38.1 ±1.6	44,727	19,322	22,728
10	29418	North Charleston	38.0 ±4.8	26,052	11,134	12,100
11	29483	Summerville	37.4 ±1.0	59,186	22,195	26,002
12	29420	North Charleston	34.7 ±2.5	23,959	9,515	10,815
13	29456	Ladson	31.9 ±1.3	41,214	15,666	17,379

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; 13 of 13 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 7,523 households, on 17 carrier routes with 8,636 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 29448 on the EDDM route map

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Frequently asked questions

Which ZIP code in Dorchester County has the highest median age?: 29448 (Harleyville), at 48.1 (±7.9), among 13 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.