12123
ZIP 12123 is Nassau, New York, mostly in Rensselaer County; area code 518; Eastern time.
- Type
- Standard
- Time zone
- America/New_York
- County
- Rensselaer +1 more
- Metro area
- Albany-Schenectady-Troy, NY
- Population
- 4,457
- Coordinates
- 42.5221, -73.6064
Weather right now
Asking the National Weather Service…
Where 12123 is
Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.
- 🔢 Type 12123 into a pocket calculator and turn it upside down: EZIZI — not quite a word, sorry.
- ➕ As a number, 12,123 = 3 × 3 × 3 × 449. Its digits add up to 9, a total 375 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10111101011011 - 🏠 Its numerical neighbours: 12122 (Middleburgh, NY, 37 mi away) and 12124 (New Baltimore, NY, 11 mi away).
- 🔄 Backwards, 12123 becomes 32121 — and that is a real ZIP code: Daytona Beach, FL, 1,008 miles away.
- 👥 17 other ZIP codes are made of exactly the same digits (11223, 11232, 12132, 12231, 13122, 13212, …). The farthest-flung twin is 32121 in Daytona Beach, FL, 1,008 miles away.
- 🧭 Farther north than 79% of all ZIP codes, and farther east than 92%.
- 🎯1,307 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 12123 and you would come out at 42.52°S, 106.39°E — 896 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 15h 18m of daylight. Shortest: 9h 03m.
- 📏 At 31.8 square miles of land, 12123 is bigger than 47% of ZIP codes — room for about 24 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 4,457This ZIP4,457 |
|---|---|
| Households | 1,964This ZIP1,964 |
| Housing units | 2,203This ZIP2,203 |
| Median age | 43.4This ZIP43.4New York39.8US 38.9 |
| Median household income | $108,878This ZIP$108,878New York$85,974US $80,734 |
| Median home value | $297,000This ZIP$297,000New York$423,800US $332,700 |
| Median gross rent | $1,023This ZIP$1,023New York$1,621US $1,413 |
| Bachelor's degree or higher | 36.9%This ZIP36.9% |
| Mean commute | 25.6 minThis ZIP25.6 min |
| Population density | 140.3 / sq miThis ZIP140.3 / sq mi |
Business and tax activity
| Business establishments | 83This ZIP83 |
|---|---|
| Employees | 334This ZIP334 |
| Annual payroll | $16,997,000This ZIP$16,997,000 |
| Tax returns filed | 2,630This ZIP2,630 |
| Total adjusted gross income | $217,294,000This ZIP$217,294,000 |
Land area
| Land area | 31.77 sq miThis ZIP31.77 sq mi |
|---|---|
| Water area | 0.47 sq miThis ZIP0.47 sq mi |
Counties 12123 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Rensselaer County | 98.1% |
| Columbia County | 1.9% |
Other place names in 12123
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 12123
| ZIP | City | Distance |
|---|---|---|
12063 | East Schodack, NY | 3.5 mi |
12115 | Malden Bridge, NY | 3.8 mi |
12132 | North Chatham, NY | 3.8 mi |
12024 | Brainard, NY | 4.6 mi |
12033 | Castleton On Hudson, NY | 4.8 mi |
12062 | East Nassau, NY | 5.3 mi |
12061 | East Greenbush, NY | 5.9 mi |
12130 | Niverville, NY | 6.2 mi |
12136 | Old Chatham, NY | 7.4 mi |
12184 | Valatie, NY | 7.5 mi |
Find every ZIP code within 10 miles of 12123 →
Questions about this ZIP code
Where is ZIP code 12123?
12123 is in Nassau, New York, in Rensselaer County, part of the Albany-Schenectady-Troy, NY metropolitan area. Its published point location is 42.5221, -73.6064.
What county is 12123 in?
12123 spans 2 counties: Rensselaer County and Columbia County. Most of it falls in Rensselaer County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.
What area code is 12123?
Nassau uses area code 518, from NANPA's telephone records.
What time zone is 12123 in?
12123 uses America/New_York.
How many people live in 12123?
About 4,457 people live in ZIP code 12123, in 1,964 households, at 140.3 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What is the median household income in 12123?
$108,878 a year, against $85,974 across New York.
What ZIP codes are near 12123?
The closest are 12063 (3.5 mi), 12115 (3.8 mi), 12132 (3.8 mi), 12024 (4.6 mi) and 12033 (4.8 mi).
Is 12123 a PO Box ZIP code?
12123 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “12123 ZIP Code — Nassau, New York (Rensselaer County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/12123
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/12123.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.