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/197

ZIP codes starting with 197

ZIP codes
27
States
DE
Largest city
New Castle, DE
Population
351,078

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 197xx

ZIP codes starting with 197
ZIP City Type Population Median income Median home
19701 Bear , DE Standard 42,984 $111,198 $372,500
19702 Newark , DE Standard 55,683 $92,446 $346,100
19703 Claymont , DE Standard 15,460 $76,939 $284,700
19706 Delaware City , DE Standard 2,038 $83,681 $263,000
19707 Hockessin , DE Standard 17,376 $172,696 $556,600
19708 Kirkwood , DE No street area — — —
19709 Middletown , DE Standard 53,234 $132,956 $470,900
19710 Montchanin , DE Standard 0 — —
19711 Newark , DE Standard 49,432 $95,403 $398,900
19712 Newark , DE No street area — — —
19713 Newark , DE Standard 30,747 $76,493 $292,600
19714 Newark , DE No street area — — —
19715 Newark , DE No street area — — —
19716 Newark , DE Standard 0 — —
19717 Newark , DE Standard 6,036 — —
19718 Newark , DE No street area — — —
19720 New Castle , DE Standard 62,392 $75,403 $265,000
19721 New Castle , DE No street area — — —
19725 Newark , DE No street area — — —
19726 New Castle , DE No street area — — —
19730 Odessa , DE Standard 425 $112,083 $322,600
19731 Port Penn , DE Standard 655 $71,282 $369,300
19732 Rockland , DE Standard 89 $236,000 $581,300
19733 Saint Georges , DE Standard 186 $82,604 $304,500
19734 Townsend , DE Standard 14,214 $127,803 $430,700
19735 Winterthur , DE Standard 0 — —
19736 Yorklyn , DE Standard 127 — —

Cite this page

zipcodes.pro. “ZIP codes starting with 197.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/197

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