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 — CITY/NY/HOLTSVILLE

Holtsville ZIP codes, New York

Holtsville, NY has 3 ZIP codes (11742, 00501 and 00544) and area codes 631 and 934. The largest is 11742.

USPS city name
3 ZIP codes
Overlapping the city
5 more
Population
19,344
Area codes
631, 934

NANPA lists no telephone rate centre for Holtsville itself, so these are the area codes of the nearest one, Ronkonkoma (3.6 miles). A town on an area-code boundary can differ from its neighbour.

Mail addressed to Holtsville uses the ZIP codes above. 5 more ZIP codes cover part of the city but are addressed as somewhere else; they are listed separately below.

Holtsville in numbers

About 19,344 people live in Holtsville, in 6,480 households. The median household income is $133,679 a year, 55% above the New York median of $85,974 (US: $80,734). The median owner-occupied home is valued at $520,600 (23% above the New York median), and median gross rent is $2,342 a month. The median age is 38.9; 34.8% of adults 25 and over hold a bachelor's degree or higher (40.2% across New York); the average commute takes 33 minutes.

Population19,344Holtsville19,344
Households6,480Holtsville6,480
Median age38.9Holtsville38.9New York39.8US 38.9
Median household income$133,679Holtsville$133,679New York$85,974US $80,734
Median home value$520,600Holtsville$520,600New York$423,800US $332,700
Median gross rent$2,342Holtsville$2,342New York$1,621US $1,413
Bachelor's degree or higher34.8%Holtsville34.8%New York40.2%US 35.7%
Mean commute32.9 minHoltsville32.9 minNew York32.6 minUS 26.4 min
Population density2,721 / sq miHoltsville2,721 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Holtsville CDP. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Holtsville

ZIP codes with the USPS city name Holtsville
ZIP City Type Population Median income Median home
11742 Holtsville , NY Standard 13,202 $125,162 $510,200
00501 Holtsville , NY No street area — — —
00544 Holtsville , NY No street area — — —

Other ZIP codes overlapping Holtsville

These ZIP codes cover part of Holtsville but are addressed as somewhere else.

ZIP codes overlapping Holtsville
ZIP City Type Population Median income Median home
11738 Farmingville , NY Standard 18,877 $140,121 $484,700
11741 Holbrook , NY Standard 26,667 $144,346 $536,900
11763 Medford , NY Standard 29,973 $120,783 $464,600
11772 Patchogue , NY Standard 45,023 $105,245 $474,800
11779 Ronkonkoma , NY Standard 38,206 $112,180 $487,300

Map of Holtsville ZIP codes

117420050100544

The ZIP codes of Holtsville, NY, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Holtsville

The nearest larger towns are Holbrook (26,449 people, 1.8 mi), Medford (24,796 people, 3.1 mi) and Selden (21,604 people, 4.1 mi).

Towns near Holtsville
TownPopulationDistance
Holbrook 26,449 1.8 mi
Farmingville 16,160 1.9 mi
North Patchogue 6,984 2.2 mi
Medford 24,796 3.1 mi
Patchogue 12,396 3.6 mi
Lake Ronkonkoma 18,221 3.8 mi
Selden 21,604 4.1 mi
Ronkonkoma 18,709 4.2 mi
Blue Point 4,735 4.2 mi
Centereach 31,839 4.3 mi
East Patchogue 21,673 4.4 mi
Bayport 8,921 4.6 mi
Lake Grove 11,061 4.9 mi
Sayville 15,408 5.0 mi

More nearby: every ZIP code in Suffolk County · New York ZIP codes

Cite this page

zipcodes.pro. “Holtsville, NY ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ny/holtsville

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