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/450

ZIP codes starting with 450

ZIP codes
39
States
OH
Largest city
Hamilton, OH
Population
646,324

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 450xx

ZIP codes starting with 450
ZIP City Type Population Median income Median home
45001 Addyston , OH Standard 904 $50,417 $105,700
45002 Cleves , OH Standard 15,413 $81,229 $310,900
45003 College Corner , OH Standard 839 $71,250 $168,800
45004 Collinsville , OH No street area — — —
45005 Franklin , OH Standard 32,251 $75,399 $218,600
45011 Hamilton , OH Standard 75,864 $91,873 $293,800
45012 Hamilton , OH No street area — — —
45013 Hamilton , OH Standard 53,998 $73,633 $232,200
45014 Fairfield , OH Standard 45,773 $75,661 $232,400
45015 Hamilton , OH Standard 11,038 $48,312 $120,700
45018 Fairfield , OH No street area — — —
45030 Harrison , OH Standard 21,640 $98,598 $241,200
45032 Harveysburg , OH Standard 683 $66,618 $163,500
45033 Hooven , OH Standard 377 $42,500 $83,200
45034 Kings Mills , OH Standard 968 $151,875 $323,900
45036 Lebanon , OH Standard 42,204 $99,128 $352,200
45039 Maineville , OH Standard 28,335 $108,794 $327,200
45040 Mason , OH Standard 59,518 $133,240 $440,000
45041 Miamitown , OH Standard 118 — —
45042 Middletown , OH Standard 27,652 $69,520 $202,200
45044 Middletown , OH Standard 56,217 $73,732 $241,600
45050 Monroe , OH Standard 12,248 $104,282 $293,100
45051 Mount Saint Joseph , OH Standard 334 $66,932 —
45052 North Bend , OH Standard 4,236 $101,165 $304,900
45053 Okeana , OH Standard 3,718 $109,148 $342,000
45054 Oregonia , OH Standard 2,693 $99,583 $296,200
45055 Overpeck , OH Standard 198 — —
45056 Oxford , OH Standard 27,376 $49,233 $250,700
45061 Ross , OH No street area — — —
45062 Seven Mile , OH Standard 511 $52,917 $141,700
45063 Shandon , OH No street area — — —
45064 Somerville , OH Standard 3,373 $102,531 $240,200
45065 South Lebanon , OH Standard 7,053 $104,795 $312,300
45066 Springboro , OH Standard 27,545 $131,250 $393,500
45067 Trenton , OH Standard 15,471 $81,605 $236,700
45068 Waynesville , OH Standard 11,597 $96,147 $335,600
45069 West Chester , OH Standard 56,037 $114,631 $345,000
45070 West Elkton , OH Standard 142 $50,417 $87,500
45071 West Chester , OH No street area — — —

Cite this page

zipcodes.pro. “ZIP codes starting with 450.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/450

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