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/555

ZIP codes starting with 555

ZIP codes
26
States
MN
Largest city
Howard Lake, MN

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 555xx

ZIP codes starting with 555
ZIP City Type
55550 Young America , MN No street area
55551 Young America , MN No street area
55553 Young America , MN No street area
55554 Norwood , MN No street area
55558 Young America , MN No street area
55568 Young America , MN No street area
55569 Osseo , MN No street area
55570 Maple Plain , MN No street area
55571 Maple Plain , MN No street area
55572 Rockford , MN No street area
55573 Young America , MN No street area
55574 Maple Plain , MN No street area
55575 Howard Lake , MN No street area
55576 Maple Plain , MN No street area
55577 Maple Plain , MN No street area
55578 Maple Plain , MN No street area
55579 Maple Plain , MN No street area
55583 Norwood , MN No street area
55592 Maple Plain , MN No street area
55593 Maple Plain , MN No street area
55594 Young America , MN No street area
55595 Loretto , MN No street area
55596 Loretto , MN No street area
55597 Loretto , MN No street area
55598 Loretto , MN No street area
55599 Loretto , MN No street area

Cite this page

zipcodes.pro. “ZIP codes starting with 555.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/555

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