Which ZIP code in St. Tammany County has the highest median age?

70437 (Folsom), at 49.4 (±4.0), 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 St. Tammany Parish, LA

These are the 13 ZIP codes in St. Tammany Parish with the highest median age, out of 13 with at least 1,000 residents. 70437 (Folsom, 49.4), 70452 (Pearl River, 45.8) and 70445 (Lacombe, 43.9) lead the list. There is no single "best" ZIP code in St. Tammany 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 St. Tammany County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	70437	Folsom	49.4 ±4.0	8,030	3,296	—
2	70452	Pearl River	45.8 ±5.2	12,650	4,895	5,623
3	70445	Lacombe	43.9 ±2.6	9,288	3,621	—
4	70471	Mandeville	43.2 ±2.4	24,199	9,607	—
5	70431	Bush	43.2 ±5.7	5,769	2,247	—
6	70433	Covington	41.2 ±1.2	41,876	17,468	—
7	70448	Mandeville	40.9 ±2.9	26,338	9,923	10,389
8	70435	Covington	40.0 ±1.9	22,475	8,481	—
9	70458	Slidell	39.7 ±2.4	39,034	15,483	16,830
10	70420	Abita Springs	39.3 ±4.2	7,950	2,883	3,562
11	70460	Slidell	39.1 ±2.7	21,669	8,463	9,347
12	70447	Madisonville	38.7 ±2.7	17,897	6,003	—
13	70461	Slidell	38.0 ±1.8	34,808	12,456	—

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 16 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 23,666 households. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 70437 on the EDDM route map

More rankings

Businesses that mail these ZIP codes

Map it and price it

EDDM guides

Frequently asked questions

Which ZIP code in St. Tammany County has the highest median age?: 70437 (Folsom), at 49.4 (±4.0), 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.