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/993

ZIP codes starting with 993

ZIP codes
36
States
WA
Largest city
Pasco, WA
Population
413,243

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 993xx

ZIP codes starting with 993
ZIP City Type Population Median income Median home
99301 Pasco , WA Standard 87,044 $87,951 $385,500
99302 Pasco , WA No street area — — —
99320 Benton City , WA Standard 9,879 $90,102 $373,500
99321 Beverly , WA Standard 1,047 $75,795 —
99322 Bickleton , WA Standard 412 — —
99323 Burbank , WA Standard 4,082 $93,092 $412,900
99324 College Place , WA Standard 10,137 $62,839 $368,500
99326 Connell , WA Standard 6,336 $82,500 $320,800
99328 Dayton , WA Standard 3,646 $72,756 $272,100
99329 Dixie , WA Standard 127 — $311,400
99330 Eltopia , WA Standard 1,210 $140,093 $554,200
99333 Hooper , WA Standard 151 $98,315 $450,000
99335 Kahlotus , WA Standard 229 $91,667 $250,000
99336 Kennewick , WA Standard 50,735 $62,527 $324,400
99337 Kennewick , WA Standard 33,287 $98,848 $395,500
99338 Kennewick , WA Standard 20,633 $111,042 $551,500
99341 Lind , WA Standard 765 $68,558 $238,200
99343 Mesa , WA Standard 3,215 $59,451 $253,000
99344 Othello , WA Standard 19,534 $64,888 $281,900
99345 Paterson , WA Standard 162 $102,500 $415,500
99346 Plymouth , WA Standard 198 $50,865 $209,200
99347 Pomeroy , WA Standard 2,512 $64,699 $243,400
99348 Prescott , WA Standard 1,633 $79,167 $237,200
99349 Mattawa , WA Standard 8,143 $61,333 $427,800
99350 Prosser , WA Standard 14,837 $81,014 $338,500
99352 Richland , WA Standard 37,430 $100,108 $474,100
99353 West Richland , WA Standard 19,251 $121,845 $450,500
99354 Richland , WA Standard 25,559 $91,933 $392,600
99356 Roosevelt , WA Standard 378 $55,750 —
99357 Royal City , WA Standard 3,843 $57,034 $326,700
99359 Starbuck , WA Standard 94 $61,000 $135,400
99360 Touchet , WA Standard 1,350 $93,036 $454,500
99361 Waitsburg , WA Standard 1,992 $91,367 $295,900
99362 Walla Walla , WA Standard 42,853 $72,474 $429,600
99363 Wallula , WA Standard 145 — $253,300
99371 Washtucna , WA Standard 394 $77,500 $217,500

Cite this page

zipcodes.pro. “ZIP codes starting with 993.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/993

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