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/199

ZIP codes starting with 199

ZIP codes
44
States
DE
Largest city
Dover, DE
Population
448,174

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 199xx

ZIP codes starting with 199
ZIP City Type Population Median income Median home
19901 Dover , DE Standard 37,763 $66,388 $273,000
19902 Dover Afb , DE Standard 44 — —
19903 Dover , DE No street area — — —
19904 Dover , DE Standard 38,818 $66,908 $309,400
19905 Dover , DE No street area — — —
19906 Dover , DE No street area — — —
19930 Bethany Beach , DE Standard 3,014 $125,491 $887,400
19931 Bethel , DE Standard 375 $99,375 $294,700
19933 Bridgeville , DE Standard 10,597 $60,703 $269,200
19934 Camden Wyoming , DE Standard 14,061 $87,125 $336,300
19936 Cheswold , DE Standard 152 $34,135 $110,400
19938 Clayton , DE Standard 9,561 $99,596 $381,000
19939 Dagsboro , DE Standard 7,490 $89,806 $420,700
19940 Delmar , DE Standard 7,540 $65,024 $235,300
19941 Ellendale , DE Standard 3,435 $75,139 $243,800
19943 Felton , DE Standard 13,410 $73,925 $312,300
19944 Fenwick Island , DE Standard 636 $121,250 $1,189,300
19945 Frankford , DE Standard 9,640 $87,638 $443,100
19946 Frederica , DE Standard 5,603 $80,459 $302,800
19947 Georgetown , DE Standard 20,760 $71,229 $322,300
19950 Greenwood , DE Standard 7,918 $75,305 $292,900
19951 Harbeson , DE Standard 2,245 $95,546 $472,400
19952 Harrington , DE Standard 10,908 $76,791 $282,600
19953 Hartly , DE Standard 5,255 $81,792 $246,700
19954 Houston , DE Standard 1,427 $60,345 $316,800
19955 Kenton , DE Standard 352 $44,634 $225,500
19956 Laurel , DE Standard 16,327 $65,603 $259,500
19958 Lewes , DE Standard 31,938 $97,197 $534,600
19960 Lincoln , DE Standard 6,774 $67,200 $275,700
19961 Little Creek , DE No street area — — —
19962 Magnolia , DE Standard 13,770 $104,260 $374,200
19963 Milford , DE Standard 23,500 $71,108 $322,500
19964 Marydel , DE Standard 1,418 $99,402 $329,900
19966 Millsboro , DE Standard 35,884 $78,305 $317,500
19967 Millville , DE Standard 2,376 $98,301 $483,100
19968 Milton , DE Standard 15,486 $87,163 $437,000
19969 Nassau , DE No street area — — —
19970 Ocean View , DE Standard 8,524 $94,103 $526,600
19971 Rehoboth Beach , DE Standard 14,886 $102,146 $608,800
19973 Seaford , DE Standard 26,834 $64,387 $278,300
19975 Selbyville , DE Standard 10,862 $88,568 $462,700
19977 Smyrna , DE Standard 27,704 $76,826 $341,000
19979 Viola , DE Standard 619 $72,361 $293,900
19980 Woodside , DE Standard 268 $85,272 $350,000

Cite this page

zipcodes.pro. “ZIP codes starting with 199.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/199

Underlying data is public domain or openly licensed — sources, vintages and licences.