Which ZIP code in San Juan County has the lowest median age?

00913 (San Juan), at 31.5 (±6.9), among 17 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.

Youngest ZIP codes in San Juan Municipio, PR

These are the 17 ZIP codes in San Juan Municipio with the lowest median age, out of 17 with at least 1,000 residents. 00913 (San Juan, 31.5), 00924 (San Juan, 41.8) and 00921 (San Juan, 42.1) lead the list. There is no single "best" ZIP code in San Juan County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Youngest ZIP codes in San Juan County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	00913	San Juan	31.5 ±6.9	6,943	3,329	3,423
2	00924	San Juan	41.8 ±1.5	49,922	21,364	18,787
3	00921	San Juan	42.1 ±2.3	33,119	14,422	12,943
4	00923	San Juan	43.5 ±2.2	24,551	11,026	10,326
5	00909	San Juan	43.8 ±5.6	5,633	2,947	3,053
6	00925	San Juan	44.2 ±9.7	4,882	2,608	3,086
7	00915	San Juan	44.6 ±2.5	24,607	11,125	9,141
8	00918	San Juan	45.4 ±2.9	16,172	8,255	8,567
9	00926	San Juan	45.9 ±1.4	92,284	39,310	35,964
10	00969	Guaynabo	45.9 ±1.7	42,231	17,031	14,678
11	00920	San Juan	46.2 ±3.7	15,900	7,184	6,184
12	00912	San Juan	48.2 ±5.2	5,845	2,872	2,578
13	00911	San Juan	49.8 ±3.9	7,297	3,990	4,288
14	00901	San Juan	50.5 ±5.2	6,398	3,111	3,151
15	00917	San Juan	50.6 ±2.3	17,116	8,252	7,740
16	00927	San Juan	51.8 ±5.5	13,868	6,569	6,708
17	00907	San Juan	54.2 ±2.7	15,817	8,730	9,830

How we ranked them

Ranked by median age of all residents, lowest first (ACS 5-year estimates, 2020–2024). ZIP codes need at least 1,000 residents to be ranked; 17 of 18 qualify.

Which of these to mail, and why

Younger ZIP codes skew toward renters, students and young families: fitness, quick-service food, apartments, entertainment and first-time-buyer offers.

The top five ZIP codes on this list hold 53,088 households, on 45 carrier routes with 48,532 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 00913 on the EDDM route map

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Frequently asked questions

Which ZIP code in San Juan County has the lowest median age?: 00913 (San Juan), at 31.5 (±6.9), among 17 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median age of all residents, lowest 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.