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zipcodes.pro — STATE/IL/COUNTY/LASALLE

LaSalle County, IL ZIP codes

There are 26 ZIP codes in LaSalle County, IL, in 26 towns, from 60470 to 61377. The largest are 61350 (Ottawa), 61364 (Streator) and 61354 (Peru).

The county seat is Ottawa.

ZIP codes
26
Towns
26
County seat
Ottawa
County FIPS
17099
Population
108,714
Median household income
$73,045
Land area
1,135 sq mi
Area codes
779, 815
Metro area
Ottawa

LaSalle County ZIP codes by town

Ottawa (county seat)
61350

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of LaSalle County ZIP codes

6047060518605316053760549605516055761301613166132161325613326133461341613426134861350613546135861360613646137061371613726137361377

The ZIP codes of LaSalle County, 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.

LaSalle County in numbers

About 108,714 people live in LaSalle County, in 45,373 households, the 17th most populous of Illinois's 102 counties. The median household income is $73,045 a year, 12% below the Illinois median of $83,390 (US: $80,734). The median owner-occupied home is valued at $161,900 (39% below the Illinois median), and median gross rent is $928 a month. The median age is 42.2; 20.5% of adults 25 and over hold a bachelor's degree or higher (37.8% across Illinois); the average commute takes 26 minutes.

Population108,714LaSalle108,714
Households45,373LaSalle45,373
Median age42.2LaSalle42.2Illinois39.0US 38.9
Median household income$73,045LaSalle$73,045Illinois$83,390US $80,734
Median home value$161,900LaSalle$161,900Illinois$263,300US $332,700
Median gross rent$928LaSalle$928Illinois$1,274US $1,413
Bachelor's degree or higher20.5%LaSalle20.5%Illinois37.8%US 35.7%
Mean commute26.0 minLaSalle26.0 minIllinois27.8 minUS 26.4 min
Population density96 / sq miLaSalle96 / sq mi

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

Largest towns in LaSalle County

Largest towns in LaSalle County
TownZIP codesPopulation
Ottawa 1 18,447
Streator 1 12,330
La Salle 1 10,398
Peru 1 9,775
Mendota 1 6,994
Marseilles 1 4,279
Oglesby 1 3,570
Sheridan 1 2,519
Seneca 1 2,450
Utica 1 2,123
Earlville 1 1,942
Leland 1 1,065
Wenona 1 999
Millington 1 729
Tonica 1 717

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with LaSalle County.

Not sure you are in LaSalle County? What county am I in? answers from your location, near a county line included.

Every ZIP code in LaSalle County, with figures

ZIP codes in LaSalle County
ZIP City Type Population Median income Median home
60470 Ransom , IL Standard 358 $85,000 $131,300
60518 Earlville , IL Standard 3,289 $69,980 $165,500
60531 Leland , IL Standard 1,885 $79,808 $229,200
60537 Millington , IL Standard 726 $81,825 $230,200
60549 Serena , IL Standard 784 $108,417 $305,500
60551 Sheridan , IL Standard 5,058 $86,786 $301,600
60557 Wedron , IL Standard 0 — —
61301 La Salle , IL Standard 10,398 $60,328 $129,000
61316 Cedar Point , IL Standard 256 $74,375 $90,000
61321 Dana , IL Standard 224 $80,257 $92,000
61325 Grand Ridge , IL Standard 949 $87,500 $182,800
61332 Leonore , IL Standard 104 $50,313 $80,000
61334 Lostant , IL Standard 738 $86,250 $126,100
61341 Marseilles , IL Standard 7,692 $72,530 $200,900
61342 Mendota , IL Standard 8,543 $65,348 $153,500
61348 Oglesby , IL Standard 4,375 $76,369 $146,800
61350 Ottawa , IL Standard 23,713 $77,921 $164,500
61354 Peru , IL Standard 10,290 $76,392 $158,500
61358 Rutland , IL Standard 407 $88,393 $192,000
61360 Seneca , IL Standard 3,610 $95,093 $258,200
61364 Streator , IL Standard 17,963 $59,060 $103,700
61370 Tonica , IL Standard 1,215 $91,094 $155,100
61371 Triumph , IL Standard 83 — $108,600
61372 Troy Grove , IL Standard 300 $83,917 $200,800
61373 Utica , IL Standard 2,123 $109,000 $237,200
61377 Wenona , IL Standard 1,441 $57,321 $139,500

Cite this page

zipcodes.pro. “LaSalle County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/il/county/lasalle

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