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

45745 (Lower Salem), at 56.0 (±12.0), 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 Washington County, OH

These are the 13 ZIP codes in Washington County with the highest median age, out of 13 with at least 1,000 residents. 45745 (Lower Salem, 56.0), 45744 (Lowell, 55.8) and 45786 (Waterford, 50.6) lead the list. There is no single "best" ZIP code in Washington 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 Washington County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	45745	Lower Salem	56.0 ±12.0	1,049	547	436
2	45744	Lowell	55.8 ±2.8	2,179	1,029	1,032
3	45786	Waterford	50.6 ±3.3	3,187	1,353	1,279
4	45784	Vincent	47.3 ±9.7	3,002	1,240	1,371
5	45714	Belpre	47.1 ±5.5	9,503	4,385	4,790
6	45750	Marietta	44.2 ±1.9	26,420	11,374	11,514
7	45724	Cutler	44.2 ±11.5	1,218	550	699
8	45768	Newport	43.4 ±6.6	1,503	648	583
9	45767	New Matamoras	41.3 ±13.5	2,428	961	878
10	43787	Stockport	39.4 ±7.9	2,524	1,079	1,172
11	45742	Little Hocking	38.7 ±3.1	3,752	1,275	1,239
12	45729	Fleming	37.0 ±7.1	2,121	636	633
13	45715	Beverly	35.4 ±6.0	2,006	689	734

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 18 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 8,554 households, on 21 carrier routes with 8,908 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 45745 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 Washington County has the highest median age?: 45745 (Lower Salem), at 56.0 (±12.0), 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.