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/161

ZIP codes starting with 161

ZIP codes
45
States
PA
Largest city
New Castle, PA
Population
208,379

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 161xx

ZIP codes starting with 161
ZIP City Type Population Median income Median home
16101 New Castle , PA Standard 30,767 $51,128 $110,600
16102 New Castle , PA Standard 4,929 $56,053 $104,900
16103 New Castle , PA No street area — — —
16105 New Castle , PA Standard 15,418 $65,855 $183,500
16107 New Castle , PA No street area — — —
16108 New Castle , PA No street area — — —
16110 Adamsville , PA Standard 295 $81,250 $154,500
16111 Atlantic , PA Standard 1,282 $70,074 $162,300
16112 Bessemer , PA Standard 1,322 $74,821 $154,500
16113 Clark , PA Standard 358 $60,000 $224,400
16114 Clarks Mills , PA Standard 579 $69,500 $200,000
16115 Darlington , PA Standard 3,467 $68,571 $185,400
16116 Edinburg , PA Standard 2,727 $69,559 $130,800
16117 Ellwood City , PA Standard 15,786 $73,045 $153,600
16120 Enon Valley , PA Standard 2,221 $65,750 $164,900
16121 Farrell , PA Standard 4,199 $42,595 $87,800
16123 Fombell , PA Standard 2,335 $102,500 $251,400
16124 Fredonia , PA Standard 1,462 $55,455 $171,500
16125 Greenville , PA Standard 17,178 $54,787 $150,200
16127 Grove City , PA Standard 15,117 $72,429 $213,700
16130 Hadley , PA Standard 1,810 $58,750 $153,900
16131 Hartstown , PA Standard 777 $59,659 $160,800
16132 Hillsville , PA Standard 327 $57,650 —
16133 Jackson Center , PA Standard 1,425 $76,713 $201,200
16134 Jamestown , PA Standard 3,992 $63,519 $149,400
16136 Koppel , PA Standard 811 $73,750 $107,600
16137 Mercer , PA Standard 12,490 $71,250 $187,000
16140 New Bedford , PA Standard 293 — —
16141 New Galilee , PA Standard 2,033 $73,910 $173,300
16142 New Wilmington , PA Standard 5,522 $84,205 $226,300
16143 Pulaski , PA Standard 2,100 $85,375 $174,800
16145 Sandy Lake , PA Standard 2,660 $67,321 $180,100
16146 Sharon , PA Standard 12,936 $45,670 $78,800
16148 Hermitage , PA Standard 16,545 $70,490 $197,900
16150 Sharpsville , PA Standard 6,856 $56,334 $148,200
16151 Sheakleyville , PA Standard 52 $73,958 $88,300
16153 Stoneboro , PA Standard 2,234 $63,750 $149,300
16154 Transfer , PA Standard 2,539 $57,870 $167,000
16155 Villa Maria , PA Standard 98 — —
16156 Volant , PA Standard 3,431 $69,054 $221,400
16157 Wampum , PA Standard 2,840 $60,345 $158,800
16159 West Middlesex , PA Standard 4,455 $69,391 $178,000
16160 West Pittsburg , PA Standard 909 $44,510 $106,900
16161 Wheatland , PA Standard 819 $40,536 $67,700
16172 New Wilmington , PA Standard 983 — —

Cite this page

zipcodes.pro. “ZIP codes starting with 161.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/161

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