What city is 60548 in?

60548 is a Sandwich, IL mailing address. By land area, 11% lies inside Sandwich and 5% lies inside Lake Holiday; the rest is outside any Census-defined city or community.

What is the population of 60548?

About 11,721 people (±495), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 12,019.

What is the median household income in 60548?

$82,957 (±$4,866), compared with $83,390 for Illinois as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 60548?

10 USPS carrier routes with 5,002 residential and 322 business mailboxes (5,325 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 60548?

The closest, measured center to center: 60552 (3.9 mi, Somonauk), 60536 (5.5 mi, Millbrook), 60545 (5.5 mi, Plano), 60537 (6.3 mi, Millington), 60531 (8.1 mi, Leland) and 60511 (8.7 mi, Big Rock).

60548 ZIP Code, Sandwich, IL

Q: What county is 60548 in?

60548 is mostly in DeKalb County (54% of its land), with smaller parts in LaSalle and Kendall counties.

60548 is a ZIP code in Sandwich, Illinois — mostly in DeKalb County (54% of its land), with smaller parts in LaSalle and Kendall counties. It covers 41 square miles of land. The closest ZIP codes are 60552, 60536 and 60545. 11,721 people live here in 4,548 households. With about 283 people per square mile it is lightly settled, and most homes are owner-occupied (82%). Median household income is $82,957, close to the Illinois median of $83,390.

Quick facts

Mailing city: Sandwich, IL
County: DeKalb County
Land area: 41 sq mi
Population: 11,721
Median household income: $82,957
Carrier routes: 10 (5,002 homes)

Key figures

Measure	Value
Residents	11,721
Households	4,548
Median household income	$82,957
Income per person	$39,818
Median age	40.8
Homeowners	82.1%
Median home value	$262,100
Median rent	$1,045
Bachelor's degree or higher	21.6%
Average commute (minutes)	33.6
Households with kids under 18	32.0%
Moved in the past year	4.5%
Below the poverty line	7.2%
Broadband internet	91.6%
Speak a non-English language at home	8.8%

Household income

% of households	Value
<$10K	4.4%
$10–15K	2.6%
$15–25K	5.2%
$25–35K	6.0%
$35–50K	9.7%
$50–75K	16.0%
$75–100K	15.8%
$100–150K	20.8%
$150–200K	11.9%
$200K+	7.6%

Age

% of all residents	Value
<10	13.1%
10–19	14.5%
20–24	3.9%
25–34	10.0%
35–44	13.7%
45–54	12.1%
55–64	11.3%
65–74	13.0%
75+	8.5%

Tenure

% of housing units	Value
Owned, with mortgage	45.4%
Owned outright	32.0%
Rented	16.5%
Vacant	6.0%

Type of building

% of housing units	Value
Detached house	73.9%
Townhome	3.9%
2–4 units	6.8%
5–19 units	0.3%
20+ units	2.9%
Mobile / other	12.2%

Businesses in 60548

244 business establishments with 2,448 employees (ZIP Codes Business Patterns 2023).

Construction: 37
Health Care and Social Assistance: 35
Retail Trade: 28
Other Services (except Public Administration): 26
Accommodation and Food Services: 25
Manufacturing: 19
Finance and Insurance: 13
Professional, Scientific, and Technical Services: 13

EDDM carrier routes

60548 has 10 USPS carrier routes with 5,002 residential and 322 business mailboxes. Open the EDDM route map.

Carrier routes in 60548

60548 has 10 USPS carrier routes (6 city (C), 4 rural (R)) with 5,002 residential and 322 business mailboxes. Routes range from 224 homes (C004) to 753 homes (R002); the median route has 530 homes. The Census counted 4,548 households in 60548 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	1
250–499	3
500–749	5
750–999	1
1,000–1,499	0
1,500+	0

Best routes in 60548 for…

Most businesses

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

Route C001 — USPS business mailboxes 118, 259 homes
Route C003 — USPS business mailboxes 101, 518 homes
Route R004 — USPS business mailboxes 37, 638 homes
Route C002 — USPS business mailboxes 24, 542 homes
Route R001 — USPS business mailboxes 18, 485 homes

Select these 5 routes on the route map

Every carrier route in 60548

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C001	City	259	118	$85,233	—	—	—
C002	City	542	24	$81,731	—	—	—
C003	City	518	101	$81,731	—	—	—
C004	City	224	1	$81,731	—	—	—
C005	City	692	13	$81,731	—	—	—
C006	City	291	2	$85,233	—	—	—
R001	Rural	485	18	$81,731	—	—	—
R002	Rural	753	0	$103,381	—	—	—
R003	Rural	600	8	$100,552	—	—	—
R004	Rural	638	37	$100,552	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 60548 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

60552 — Somonauk village, IL (3.9 mi)
60536 — Millbrook village, IL (5.5 mi)
60545 — Plano city, IL (5.5 mi)
60537 — Millington village, IL (6.3 mi)
60531 — Leland village, IL (8.1 mi)
60511 — Big Rock village, IL (8.7 mi)
60551 — Sheridan village, IL (9 mi)
60520 — Hinckley village, IL (9.7 mi)

Areas that include 60548

Sandwich, IL ZIP codes — 1 ZIP code
Lake Holiday, IL ZIP codes — 2 ZIP codes
Somonauk, IL ZIP codes — 2 ZIP codes
DeKalb County ZIP codes — 18 ZIP codes
Kendall County ZIP codes — 15 ZIP codes
LaSalle County ZIP codes — 28 ZIP codes
Illinois ZIP code data

Where it ranks

Mail every home in 60548

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) 60548, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 60548 in?: 60548 is a Sandwich, IL mailing address. By land area, 11% lies inside Sandwich and 5% lies inside Lake Holiday; the rest is outside any Census-defined city or community.
What county is 60548 in?: 60548 is mostly in DeKalb County (54% of its land), with smaller parts in LaSalle and Kendall counties.
What is the population of 60548?: About 11,721 people (±495), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 12,019.
What is the median household income in 60548?: $82,957 (±$4,866), compared with $83,390 for Illinois as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 60548?: 10 USPS carrier routes with 5,002 residential and 322 business mailboxes (5,325 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 60548?: The closest, measured center to center: 60552 (3.9 mi, Somonauk), 60536 (5.5 mi, Millbrook), 60545 (5.5 mi, Plano), 60537 (6.3 mi, Millington), 60531 (8.1 mi, Leland) and 60511 (8.7 mi, Big Rock).

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