What city is 11742 in?

11742 is a Holtsville, NY mailing address. By land area, 99% lies inside Holtsville.

What is the population of 11742?

About 13,202 people (±1,015), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 12,699.

What is the median household income in 11742?

$125,162 (±$14,187), compared with $85,974 for New York as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 11742?

10 USPS carrier routes with 4,675 residential and 242 business mailboxes (4,917 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 11742?

The closest, measured center to center: 11741 (1.8 mi, Holbrook), 11738 (1.9 mi, Farmingville), 11763 (3.3 mi, Medford), 11779 (3.8 mi, Ronkonkoma), 11784 (4 mi, Selden) and 11715 (4.1 mi, Blue Point).

11742 ZIP Code, Holtsville, NY

11742 is a ZIP code in Holtsville, New York in Suffolk County. It covers 5.1 square miles of land. The closest ZIP codes are 11741, 11738 and 11763. 13,202 people live here in 4,651 households. At about 2,564 people per square mile it has suburban density, and most homes are owner-occupied (84%). Median household income is $125,162, above the New York median of $85,974.

Quick facts

Mailing city: Holtsville, NY
County: Suffolk County
Land area: 5.1 sq mi
Population: 13,202
Median household income: $125,162
Carrier routes: 10 (4,675 homes)

Key figures

Measure	Value
Residents	13,202
Households	4,651
Median household income	$125,162
Income per person	$55,928
Median age	39.3
Homeowners	83.6%
Median home value	$510,200
Median rent	$2,400
Bachelor's degree or higher	36.1%
Average commute (minutes)	30.7
Households with kids under 18	33.2%
Moved in the past year	6.8%
Below the poverty line	5.6%
Broadband internet	96.9%
Speak a non-English language at home	16.1%

Household income

% of households	Value
<$10K	1.5%
$10–15K	2.1%
$15–25K	2.4%
$25–35K	4.5%
$35–50K	8.9%
$50–75K	10.0%
$75–100K	11.4%
$100–150K	17.0%
$150–200K	17.2%
$200K+	25.0%

Age

% of all residents	Value
<10	11.9%
10–19	12.0%
20–24	5.1%
25–34	12.3%
35–44	16.6%
45–54	14.3%
55–64	14.1%
65–74	9.7%
75+	4.2%

Tenure

% of housing units	Value
Owned, with mortgage	56.6%
Owned outright	25.9%
Rented	15.9%
Vacant	1.5%

Type of building

% of housing units	Value
Detached house	69.4%
Townhome	9.4%
2–4 units	3.3%
5–19 units	11.6%
20+ units	6.2%
Mobile / other	0.0%

Businesses in 11742

345 business establishments with 5,410 employees (ZIP Codes Business Patterns 2023).

Construction: 80
Professional, Scientific, and Technical Services: 40
Wholesale Trade: 33
Other Services (except Public Administration): 30
Retail Trade: 29
Health Care and Social Assistance: 28
Accommodation and Food Services: 22
Real Estate and Rental and Leasing: 17

EDDM carrier routes

11742 has 10 USPS carrier routes with 4,675 residential and 242 business mailboxes. Open the EDDM route map.

Carrier routes in 11742

11742 has 10 USPS carrier routes (10 city (C)) with 4,675 residential and 242 business mailboxes. Routes range from 126 homes (C015) to 677 homes (C008); the median route has 460 homes. The Census counted 4,651 households in 11742 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	1
250–499	5
500–749	4
750–999	0
1,000–1,499	0
1,500+	0

Best routes in 11742 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

Route C010 — USPS business mailboxes 102, 381 homes
Route C007 — USPS business mailboxes 38, 479 homes
Route C005 — USPS business mailboxes 34, 435 homes
Route C002 — USPS business mailboxes 27, 507 homes
Route C003 — USPS business mailboxes 26, 428 homes

Select these 5 routes on the route map

Every carrier route in 11742

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C001	City	533	0	$200,001+	—	—	—
C002	City	507	27	$127,237	—	—	—
C003	City	428	26	$136,926	—	—	—
C005	City	435	34	$103,802	—	—	—
C006	City	669	1	$103,802	—	—	—
C007	City	479	38	$103,802	—	—	—
C008	City	677	9	$104,578	—	—	—
C009	City	440	2	$171,366	—	—	—
C010	City	381	102	$127,237	—	—	—
C015	City	126	3	$136,926	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 11742 on the EDDM route map.

How route demographics are estimated

Mailbox counts come from USPS; demographics are estimates

The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).

How a route gets its figures: the block-group length-share method

We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.

Margins of error

Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.

Different years

USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.

Why some routes show identical figures

Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.

Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Nearby ZIP codes

11741 — Holbrook CDP, NY (1.8 mi)
11738 — Farmingville CDP, NY (1.9 mi)
11763 — Medford CDP, NY (3.3 mi)
11779 — Ronkonkoma CDP, NY (3.8 mi)
11784 — Selden CDP, NY (4 mi)
11715 — Blue Point CDP, NY (4.1 mi)
11772 — East Patchogue CDP, NY (4.4 mi)
11720 — Centereach CDP, NY (4.6 mi)

Areas that include 11742

Holtsville, NY ZIP codes — 1 ZIP code
Suffolk County ZIP codes — 108 ZIP codes
New York ZIP code data

Where it ranks

Mail every home in 11742

Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 11742, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 11742 in?: 11742 is a Holtsville, NY mailing address. By land area, 99% lies inside Holtsville.
What county is 11742 in?: 11742 is in Suffolk County.
What is the population of 11742?: About 13,202 people (±1,015), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 12,699.
What is the median household income in 11742?: $125,162 (±$14,187), compared with $85,974 for New York as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 11742?: 10 USPS carrier routes with 4,675 residential and 242 business mailboxes (4,917 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 11742?: The closest, measured center to center: 11741 (1.8 mi, Holbrook), 11738 (1.9 mi, Farmingville), 11763 (3.3 mi, Medford), 11779 (3.8 mi, Ronkonkoma), 11784 (4 mi, Selden) and 11715 (4.1 mi, Blue Point).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.