ZIP codes starting with 523
- ZIP codes
- 53
- States
- IA
- Largest city
- Marion, IA
- Population
- 175,147
The first three digits of a ZIP code identify a sectional center facility — the postal processing plant that sorts mail for the area. It is a mail-routing grouping, not an administrative boundary.
Every ZIP code in 523xx
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
52301 | Marengo , IA | Standard | 4,028 | $70,150 | $160,300 |
52302 | Marion , IA | Standard | 42,706 | $87,983 | $244,400 |
52305 | Martelle , IA | Standard | 913 | $94,452 | $165,000 |
52306 | Mechanicsville , IA | Standard | 1,642 | $61,875 | $167,500 |
52307 | Middle Amana , IA | Standard | 63 | $43,388 | — |
52308 | Millersburg , IA | Standard | 129 | $79,688 | $106,500 |
52309 | Monmouth , IA | Standard | 443 | $56,250 | $155,400 |
52310 | Monticello , IA | Standard | 6,450 | $86,080 | $195,800 |
52312 | Morley , IA | Standard | 46 | $37,188 | $83,800 |
52313 | Mount Auburn , IA | Standard | 480 | $91,146 | $208,300 |
52314 | Mount Vernon , IA | Standard | 6,200 | $109,244 | $265,100 |
52315 | Newhall , IA | Standard | 1,339 | $77,656 | $196,100 |
52316 | North English , IA | Standard | 1,597 | $60,768 | $150,600 |
52317 | North Liberty , IA | Standard | 23,097 | $105,318 | $322,800 |
52318 | Norway , IA | Standard | 1,099 | $85,625 | $188,400 |
52320 | Olin , IA | Standard | 1,425 | $62,222 | $131,300 |
52321 | Onslow , IA | Standard | 395 | $77,708 | $131,300 |
52322 | Oxford , IA | Standard | 2,266 | $64,444 | $261,100 |
52323 | Oxford Junction , IA | Standard | 942 | $41,425 | $85,800 |
52324 | Palo , IA | Standard | 2,216 | $115,917 | $327,400 |
52325 | Parnell , IA | Standard | 477 | $75,714 | — |
52326 | Quasqueton , IA | Standard | 694 | $76,250 | $144,400 |
52327 | Riverside , IA | Standard | 3,796 | $86,942 | $298,800 |
52328 | Robins , IA | Standard | 2,712 | $125,347 | $382,900 |
52329 | Rowley , IA | Standard | 671 | $57,500 | $171,000 |
52330 | Ryan , IA | Standard | 940 | $86,536 | $260,600 |
52332 | Shellsburg , IA | Standard | 1,612 | $92,708 | $198,000 |
52333 | Solon , IA | Standard | 7,295 | $118,721 | $366,900 |
52334 | South Amana , IA | Standard | 181 | — | $172,700 |
52335 | South English , IA | Standard | 644 | $52,162 | $106,100 |
52336 | Springville , IA | Standard | 2,397 | $91,458 | $225,300 |
52337 | Stanwood , IA | Standard | 729 | $66,875 | $160,100 |
52338 | Swisher , IA | Standard | 3,934 | $119,605 | $392,700 |
52339 | Tama , IA | Standard | 4,326 | $67,612 | $121,400 |
52340 | Tiffin , IA | Standard | 6,128 | $98,393 | $342,800 |
52341 | Toddville , IA | Standard | 1,378 | $91,250 | $371,800 |
52342 | Toledo , IA | Standard | 2,705 | $57,813 | $142,700 |
52344 | Troy Mills , IA | Standard | 67 | — | — |
52345 | Urbana , IA | Standard | 1,609 | $115,179 | $226,800 |
52346 | Van Horne , IA | Standard | 1,113 | $113,342 | $247,100 |
52347 | Victor , IA | Standard | 1,386 | $78,482 | $144,700 |
52348 | Vining , IA | Standard | 66 | $72,500 | $90,800 |
52349 | Vinton , IA | Standard | 7,737 | $71,314 | $181,200 |
52351 | Walford , IA | Standard | 1,329 | $128,750 | $303,000 |
52352 | Walker , IA | Standard | 1,833 | $92,321 | $231,300 |
52353 | Washington , IA | Standard | 9,241 | $63,047 | $160,500 |
52354 | Watkins , IA | Standard | 420 | $112,969 | $165,800 |
52355 | Webster , IA | Standard | 283 | $63,750 | $110,200 |
52356 | Wellman , IA | Standard | 2,664 | $57,321 | $227,800 |
52358 | West Branch , IA | Standard | 3,598 | $91,686 | $240,300 |
52359 | West Chester , IA | Standard | 308 | $67,727 | — |
52361 | Williamsburg , IA | Standard | 4,582 | $60,992 | $211,200 |
52362 | Wyoming , IA | Standard | 816 | $72,583 | $135,800 |
Cite this page
zipcodes.pro. “ZIP codes starting with 523.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/523
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