LaSalle County, Illinois Cities (2025)

64 cities

City
Rank
2025 Pop.
2020 Pop.
Annual Change
Density
Area (mi²)
Type
Rutland128,37726,7760.93%78536.15 Township
Ottawa218,69118,843-0.16%1,25514.89 City
LaSalle313,20213,400-0.02%78316.86 Township
Streator412,13512,470-0.55%1,6597.32 City
Bruce511,71511,919-0.08%69016.98 Township
Ottawa611,25611,2520.33%74115.18 Township
Peru710,01010,152-0.01%57317.48 Township
Peru89,6869,921-0.48%93410.37 City
LaSalle99,3449,563-0.47%69413.46 City
South Ottawa108,3738,3500.36%42619.66 Township
Northville117,3287,3370.21%22432.70 Township
Mendota127,0357,153-0.06%19635.93 Township
Mendota136,8567,038-0.52%1,3375.13 City
Marseilles144,7414,820-0.34%5249.05 City
Mission154,0684,0730.2%12831.68 Township
Oglesby163,5993,699-0.55%7214.99 City
Rutland173,5723,5920.17%10234.99 Township
Seneca182,8762,8900%8035.87 Township
Otter Creek192,6432,6630.11%7435.81 Township
Earl202,4372,4540.08%6537.48 Township
Dayton212,4322,4190.37%11521.09 Township
Sheridan222,4082,432-0.21%1,1352.12 Village
Seneca232,2892,343-0.48%3696.21 Village
Utica241,9561,9330.36%10918.01 Township
Adams251,5931,620-0.13%4833.11 Township
Earlville261,5871,611-0.31%1,3211.20 City
Eagle271,4411,465-0.07%4631.27 Township
Eden281,3531,379-0.15%3736.17 Township
North Utica291,3421,3170.37%3883.46 Village
Troy Grove301,2681,2780.08%3635.67 Township
Serena311,1131,1210.09%3037.17 Township
Leland32919946-0.54%1,7210.53 Village
Farm Ridge338388390.48%2434.78 Township
Fall River347927900.38%3920.19 Township
Dimmick357407460%2036.54 Township
Tonica36726748-0.55%5331.36 Village
Freedom376036080.17%1637.36 Township
Miller385855870.17%1735.19 Township
Hope395815800.35%1636.36 Township
Wallace405715730.18%2127.58 Township
Grand Ridge41506516-0.39%1,0950.46 Village
Allen425045060.4%1436.23 Township
Dayton43488475-0.81%2651.84 CDP
Deer Park444744750.21%1531.33 Township
Sheridan45447462-0.89%1335.51 Township
Ophir464374400%1334.95 Township
Lostant474314330%3811.13 Village
Waltham484154190%1236.03 Township
Naplate49409418-0.49%2,5090.16 Village
Vermillion503773810%1623.05 Township
Richland513423460%1424.27 Township
Ransom52305310-0.33%3051 Village
Grand Rapids532772800%835.60 Township
Meriden542652660%835.28 Township
Cedar Point55258267-0.77%2531.02 Village
Serena562581377.5%1,0490.25 CDP
Rutland572542560%3660.69 Village
Osage582462460%638.29 Township
Kangley59226233-0.44%8660.26 Village
Troy Grove60219223-0.45%3190.69 Village
Wedron611811707.1%3490.52 CDP
Dana62155159-0.64%7050.22 Village
Leonore63119123-0.83%1,3370.09 Village
Triumph64106827.07%7110.15 CDP

LaSalle County Cities Summary

Largest City

Rutland is the largest city in LaSalle County, with a population of 28,377.

Smallest City

Triumph is the smallest city in LaSalle County, with a population of 106.

10 Largest Cities

There are 64 cities in LaSalle County, Illinois.

Location of LaSalle County