County of grundy

illinois

History & Founding

Located in the northeastern portion of Illinois, this county occupies a region steeped in history and characterized by a blend of agricultural heritage and quiet, small-town charm. Established in 2018 from portions of LaSalle and Kendall counties, it was named in honor of Jacob Grundy, a prominent Illinois politician and former Illinois Secretary of State. Grundy’s significant contributions to the state’s legal and political landscape earned him this lasting recognition. Early settlers, many of whom were of German and Irish descent, cleared the land and established farms, contributing to the region's growth as a vital agricultural center. During the 19th century, the county witnessed a boom in coal mining, attracting workers and shaping the local economy. An interesting anecdote from the county’s past involves a brief, albeit unsuccessful, attempt to establish a canal connecting the Illinois River to the Chicago area, showcasing the ambition and development goals of the time.

Geography & Landscape

The county’s geography is defined by gently rolling hills and fertile farmland, typical of the Illinois River Valley. Situated within the Central Illinois Till Plain, the terrain is primarily flat to undulating. The Shabbona River and the Fox River flow through the county, providing valuable water resources and contributing to the area’s scenic beauty. While lacking significant mountains, the landscape features numerous lakes and ponds, offering recreational opportunities for residents and visitors. The climate is characterized by four distinct seasons, with warm, humid summers and cold, snowy winters. The average annual rainfall supports robust agricultural production. The county's land area covers approximately 420 square miles, offering a mix of open spaces and developed areas.

Economy & Communities

The area’s economy is rooted in agriculture, with corn, soybeans, and livestock being major contributors. While farming remains important, the county has also seen growth in light industry and manufacturing. Major towns include Morris, the county seat, known for its historic architecture and annual Grundy County Fair; Braceville, with its strong community spirit; and Coal City, reflecting its historical connection to coal mining. Notable employers range from agricultural cooperatives and processing plants to manufacturing facilities and local government agencies. The character of the area is predominantly rural, with a strong sense of community and a slower pace of life, although suburban influences are increasingly visible in some areas.

Points of Interest

Points of interest reflect the county’s rich history and natural beauty. The Grundy County Historical Society Museum in Morris showcases artifacts and exhibits detailing the area’s past. Shabbona Lake State Recreation Area offers opportunities for fishing, boating, and camping. The annual Grundy County Fair is a long-standing tradition, drawing crowds from across the region. The county’s residents have included individuals who have made significant contributions to Illinois and beyond. Uniquely, the county has a relatively low population density compared to other Illinois counties, contributing to its tranquil atmosphere and preserving its rural character.

Information

State
illinois
Type
County
Population
37,535
Land area
420 sq mi
Capital
Morris
Time zone
UTC-6
FIPS
17063

10 Cities

CityPopulationElevation
Morris11,928519 ft (158 m)
Coal City4,797565 ft (172 m)
Minooka3,971610 ft (186 m)
Gardner1,406590 ft (180 m)
Diamond1,393563 ft (172 m)
Mazon904586 ft (179 m)
Braceville792582 ft (177 m)
South Wilmington621587 ft (179 m)
Carbon Hill392560 ft (171 m)
Verona257640 ft (195 m)

Other counties in illinois