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/666

ZIP codes starting with 666

ZIP codes
31
States
KS
Largest city
Topeka, KS
Population
163,243

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 666xx

ZIP codes starting with 666
ZIP City Type Population Median income Median home
66601 Topeka , KS No street area — — —
66603 Topeka , KS Standard 1,830 $44,688 $107,900
66604 Topeka , KS Standard 23,006 $60,874 $139,100
66605 Topeka , KS Standard 20,891 $59,106 $170,500
66606 Topeka , KS Standard 9,842 $57,169 $130,600
66607 Topeka , KS Standard 9,965 $29,797 $46,400
66608 Topeka , KS Standard 4,216 $49,126 $87,500
66609 Topeka , KS Standard 7,572 $67,675 $109,000
66610 Topeka , KS Standard 9,849 $132,821 $341,100
66611 Topeka , KS Standard 9,828 $55,837 $156,600
66612 Topeka , KS Standard 1,754 $26,067 —
66614 Topeka , KS Standard 32,538 $71,377 $194,100
66615 Topeka , KS Standard 2,943 $107,656 $290,700
66616 Topeka , KS Standard 6,212 $51,893 $82,900
66617 Topeka , KS Standard 8,903 $86,761 $232,900
66618 Topeka , KS Standard 10,179 $109,884 $254,200
66619 Topeka , KS Standard 3,217 $51,528 $89,900
66620 Topeka , KS No street area — — —
66621 Topeka , KS Standard 442 — —
66622 Topeka , KS Standard 56 — —
66624 Topeka , KS No street area — — —
66625 Topeka , KS No street area — — —
66626 Topeka , KS No street area — — —
66629 Topeka , KS No street area — — —
66630 Topeka , KS No street area — — —
66636 Topeka , KS No street area — — —
66647 Topeka , KS No street area — — —
66667 Topeka , KS No street area — — —
66675 Topeka , KS No street area — — —
66683 Topeka , KS No street area — — —
66699 Topeka , KS No street area — — —

Cite this page

zipcodes.pro. “ZIP codes starting with 666.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/666

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