Which ZIP code in Waldo County has the lowest median age?

04988 (Unity), at 27.8 (±2.1), among 14 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 Waldo County, ME

These are the 14 ZIP codes in Waldo County with the lowest median age, out of 14 with at least 1,000 residents. 04988 (Unity, 27.8), 04986 (Thorndike, 33.0) and 04496 (Winterport, 42.3) lead the list. There is no single "best" ZIP code in Waldo 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 Waldo County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	04988	Unity	27.8 ±2.1	1,894	588	663
2	04986	Thorndike	33.0 ±9.2	2,228	688	706
3	04496	Winterport	42.3 ±5.5	3,850	1,696	1,038
4	04941	Freedom	42.4 ±4.2	1,577	664	827
5	04974	Searsport	42.9 ±7.2	2,655	1,162	1,291
6	04921	Brooks	43.3 ±7.0	1,775	768	568
7	04354	Palermo	43.4 ±6.1	1,473	657	725
8	04951	Monroe	43.5 ±7.0	1,001	422	456
9	04973	Searsmont	44.5 ±9.8	1,646	660	—
10	04952	Morrill	47.6 ±3.7	1,790	780	864
11	04438	Frankfort	50.2 ±5.8	1,098	486	493
12	04981	Stockton Springs	50.6 ±4.4	2,575	1,163	1,123
13	04849	Lincolnville	53.8 ±2.5	4,017	1,787	1,971
14	04915	Belfast	57.1 ±2.8	9,107	4,354	4,738

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; 14 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 4,798 households, on 10 carrier routes with 4,525 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 04988 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 Waldo County has the lowest median age?: 04988 (Unity), at 27.8 (±2.1), among 14 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.