Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — PREFIX/166

ZIP codes starting with 166

ZIP codes
74
States
PA
Largest city
Altoona, PA
Population
197,475

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 166xx

ZIP codes starting with 166
ZIP City Type Population Median income Median home
16601 Altoona , PA Standard 33,515 $58,070 $147,200
16602 Altoona , PA Standard 26,352 $55,046 $125,700
16603 Altoona , PA No street area — — —
16611 Alexandria , PA Standard 2,665 $70,887 $167,500
16613 Ashville , PA Standard 1,647 $73,785 $159,300
16616 Beccaria , PA Standard 103 $28,542 $152,100
16617 Bellwood , PA Standard 2,392 $52,609 $145,500
16619 Blandburg , PA Standard 393 $85,357 $110,200
16620 Brisbin , PA Standard 326 $57,857 $147,500
16621 Broad Top , PA Standard 604 $70,577 $123,500
16622 Calvin , PA Standard 82 $34,000 $170,500
16623 Cassville , PA Standard 492 $61,667 $188,900
16624 Chest Springs , PA Standard 253 $58,438 $202,500
16625 Claysburg , PA Standard 3,147 $55,274 $164,300
16627 Coalport , PA Standard 1,927 $64,013 $92,800
16629 Coupon , PA No street area — — —
16630 Cresson , PA Standard 4,726 $58,315 $152,500
16631 Curryville , PA Standard 57 — $237,500
16633 Defiance , PA Standard 313 $90,556 $86,900
16634 Dudley , PA Standard 262 $58,750 $89,700
16635 Duncansville , PA Standard 12,003 $69,760 $192,100
16636 Dysart , PA Standard 808 $89,821 $172,300
16637 East Freedom , PA Standard 2,345 $56,083 $120,400
16638 Entriken , PA Standard 58 $86,500 $214,300
16639 Fallentimber , PA Standard 1,390 $75,165 $137,500
16640 Flinton , PA Standard 1,077 $54,286 $139,400
16641 Gallitzin , PA Standard 2,348 $65,417 $116,500
16644 Glasgow , PA No street area — — —
16645 Glen Hope , PA Standard 204 $68,750 —
16646 Hastings , PA Standard 2,185 $66,359 $119,200
16647 Hesston , PA Standard 864 $88,333 $303,500
16648 Hollidaysburg , PA Standard 14,904 $81,540 $219,500
16650 Hopewell , PA Standard 1,796 $62,426 $157,700
16651 Houtzdale , PA Standard 5,484 $66,357 $111,100
16652 Huntingdon , PA Standard 15,866 $68,339 $207,700
16654 Huntingdon , PA Standard 1,906 — —
16655 Imler , PA Standard 1,427 $66,823 $162,700
16656 Irvona , PA Standard 1,148 $48,071 $101,200
16657 James Creek , PA Standard 1,170 $63,353 $214,500
16659 Loysburg , PA Standard 255 $72,656 $162,500
16660 Mc Connellstown , PA No street area — — —
16661 Madera , PA Standard 944 $58,021 $113,500
16662 Martinsburg , PA Standard 6,069 $73,828 $221,400
16663 Morann , PA No street area — — —
16664 New Enterprise , PA Standard 2,195 $76,364 $166,100
16665 Newry , PA Standard 253 $66,250 $266,700
16666 Osceola Mills , PA Standard 2,999 $63,262 $118,600
16667 Osterburg , PA Standard 1,371 $74,167 $162,500
16668 Patton , PA Standard 3,507 $58,750 $114,700
16669 Petersburg , PA Standard 2,099 $78,977 $215,500
16670 Queen , PA Standard 89 $45,625 $190,600
16671 Ramey , PA Standard 411 $78,750 $102,100
16672 Riddlesburg , PA Standard 177 $91,458 $96,700
16673 Roaring Spring , PA Standard 5,204 $70,464 $159,500
16674 Robertsdale , PA Standard 548 $64,145 $108,300
16675 Saint Boniface , PA Standard 88 $40,104 $73,300
16677 Sandy Ridge , PA Standard 239 — —
16678 Saxton , PA Standard 2,452 $55,234 $152,700
16679 Six Mile Run , PA Standard 656 $50,893 $90,400
16680 Smithmill , PA Standard 359 $81,827 $103,500
16681 Smokerun , PA No street area — — —
16682 Sproul , PA Standard 402 $75,121 —
16683 Spruce Creek , PA Standard 353 $90,625 $259,200
16684 Tipton , PA Standard 108 $34,107 —
16685 Todd , PA Standard 303 $140,313 $235,900
16686 Tyrone , PA Standard 13,427 $69,008 $173,000
16689 Waterfall , PA Standard 389 $60,000 $198,200
16691 Wells Tannery , PA Standard 325 $67,250 $208,300
16692 Westover , PA Standard 923 $74,028 $162,500
16693 Williamsburg , PA Standard 3,795 $62,898 $154,400
16694 Wood , PA Standard 355 $75,469 $123,300
16695 Woodbury , PA Standard 941 $71,667 $170,000
16698 Houtzdale , PA No street area — — —
16699 Cresson , PA Standard 0 — —

Cite this page

zipcodes.pro. “ZIP codes starting with 166.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/166

Underlying data is public domain or openly licensed — sources, vintages and licences.