Cities and Towns in Whiteside County, Illinois

Founded in 1836, Whiteside County is one of 102 counties in the state of Illinois. Historically, Whiteside County was formed from Jo Daviess and Henry County. The city of Morrison is the county seat. With FIPS code of 195, Whiteside County has a population of 55,305 and area of 684 square miles (1,772 km²).

List of all cities in Whiteside County, IL alphabetically

City/Town	Postal Code	Area Code
Albany, IL	61230	309
Brookhaven, IL	61277	815/779
Ceffco, IL	61230	309
Clyde, IL	61270	815/779
Coleta, IL	61081	815/779
Deer Grove, IL	61243	815/779
East Clinton, IL	61252	815/779
East Fulton, IL	61252	815/779
Erie, IL	61250	309
Fenton, IL	61251	309
Fulton, IL	61252	815/779
Galt, IL	61037	815/779
Garden Plain, IL	61252	815/779
Genesee, IL	61270	815/779
Hahnaman, IL	61283	815/779
Leon Corners, IL	61277	815/779
Lyndon, IL	61261	815/779
Malvern, IL	61270	815/779
Morrison, IL	61270	815/779
Portland, IL	61277	815/779
Portland Corners, IL	61277	815/779
Prophetstown, IL	61277	815/779
Rock Falls, IL	61071	815/779
Round Grove, IL	61270	815/779
Sterling, IL	61081	815/779
Tampico, IL	61283	815/779
Thomas, IL	61283	815/779
Union Grove, IL	61270	815/779
Ustick, IL	61270	815/779
Wethersfield, IL	61277	815/779
Yeoward Addition, IL	61071	815/779
Yeowardville, IL	61071	815/779

Major Cities and Towns in Whiteside County, Illinois

1. Sterling

Area, Population, Zip Codes, Latitude and Longitude

• Area: 5.96 square miles
• Population: Approximately 14,769 (2020 Census)
• Zip Codes: 61081
• Latitude: 41.7886° N
• Longitude: 89.6960° W

Location and History

Sterling is located in the northeastern part of Whiteside County, along the Rock River, which has historically provided the city with water power for its industries. Founded in the mid-19th century, Sterling quickly became known as a manufacturing center, particularly for steel and farm machinery. The city was once home to the Northwestern Steel and Wire Company, one of the largest steel mills in the region, which played a significant role in the local economy for much of the 20th century. Sterling’s location along the Rock River has also made it an important transportation hub. Over time, the city has shifted from manufacturing to a more diversified economy, with retail, healthcare, and education sectors playing important roles.

Major Schools and Landmarks

Sterling is served by Sterling Public School District #5, with Sterling High School being the city’s primary educational institution. The city is also home to Sauk Valley Community College, located just outside Sterling, which serves students from across the region. Major landmarks include the Dillon Home Museum, which offers a glimpse into the city’s rich industrial history, and the Sterling-Rock Falls Historical Society. The Rock River is a major recreational resource, with boating, fishing, and biking trails along its banks. Sterling’s downtown area features historical architecture and a variety of local shops and restaurants, adding to the city’s charm.

2. Rock Falls

Area, Population, Zip Codes, Latitude and Longitude

• Area: 3.71 square miles
• Population: Approximately 8,875 (2020 Census)
• Zip Codes: 61071
• Latitude: 41.7711° N
• Longitude: 89.6879° W

Location and History

Rock Falls is located directly across the Rock River from Sterling and shares much of its history with its neighboring city. Rock Falls was founded in the 1860s and developed as a key industrial and commercial center thanks to the water power provided by the river. The city was named for the small waterfalls found along the river. Like Sterling, Rock Falls experienced significant growth during the Industrial Revolution, with mills and factories driving the local economy. Today, Rock Falls is more residential, although manufacturing and agriculture still play important roles. Its proximity to Sterling allows residents to enjoy the amenities of a larger city while maintaining a quieter, small-town atmosphere.

Major Schools and Landmarks

Rock Falls High School serves the local student population, while elementary and middle school students attend schools in the Rock Falls Elementary School District. The Hennepin Canal Parkway State Park, which runs through the southern part of the city, is one of the most significant landmarks in Rock Falls, offering miles of trails for hiking, biking, and fishing. The city also features Bowman Park, a popular location for family gatherings and community events. The historical Coloma Township Park District manages several recreational facilities throughout the city. Additionally, the Rock Falls Riverfront is undergoing revitalization, creating more opportunities for outdoor activities and cultural events.

3. Morrison

Area, Population, Zip Codes, Latitude and Longitude

• Area: 2.44 square miles
• Population: Approximately 3,890 (2020 Census)
• Zip Codes: 61270
• Latitude: 41.8109° N
• Longitude: 89.9677° W

Location and History

Morrison is located in the western part of Whiteside County and serves as the county seat. Founded in the mid-19th century, Morrison was named after John H. Morrison, an early settler and prominent landowner. The town developed as an agricultural center, with local farms producing corn, soybeans, and livestock. Morrison’s historical downtown district still features many buildings from the late 19th century, reflecting the town’s prosperous past. Although agriculture remains important to the local economy, Morrison has diversified with small businesses, healthcare services, and light manufacturing. Its location along U.S. Route 30 has made it a convenient stop for travelers and a gateway to larger cities in the region.

Major Schools and Landmarks

Morrison Community Unit School District #6 serves the local student population, with Morrison High School offering academic and extracurricular activities. The Whiteside County Courthouse, a striking example of Romanesque architecture, is one of the most notable landmarks in the city. The Morrison-Rockwood State Park, located just outside of town, offers outdoor recreation opportunities such as hiking, fishing, and boating on Lake Carlton. The city also hosts the annual Whiteside County Fair, one of the oldest county fairs in Illinois, which draws visitors from across the region for agricultural exhibits, entertainment, and family-friendly activities.

4. Fulton

Area, Population, Zip Codes, Latitude and Longitude

• Area: 2.33 square miles
• Population: Approximately 3,297 (2020 Census)
• Zip Codes: 61252
• Latitude: 41.8675° N
• Longitude: 90.1593° W

Location and History

Fulton is located along the Mississippi River in the northwestern part of Whiteside County. The city was founded in the early 19th century and was named after Robert Fulton, the inventor of the steamboat. Fulton’s position on the river made it an important transportation hub during the 19th century, and the town thrived as a shipping point for agricultural products. Over time, the town’s economy shifted from transportation to agriculture and manufacturing. Today, Fulton is known for its rich Dutch heritage, which is celebrated annually during the city’s Dutch Days Festival. The city’s historical connection to the Mississippi River remains central to its identity.

Major Schools and Landmarks

Fulton is served by the River Bend School District, with Fulton High School being the main secondary education institution. One of the city’s most iconic landmarks is the De Immigrant Windmill, a fully operational Dutch windmill built by Dutch craftsmen and located along the Mississippi River. The Windmill Cultural Center, nearby, houses exhibits on windmill technology and history. Heritage Canyon, a restored 19th-century village, offers a glimpse into life in the early days of Fulton. The Great River Trail, a scenic bike path that runs along the Mississippi River, provides residents and visitors with opportunities for outdoor recreation while enjoying stunning river views.

5. Prophetstown

Area, Population, Zip Codes, Latitude and Longitude

• Area: 1.63 square miles
• Population: Approximately 1,927 (2020 Census)
• Zip Codes: 61277
• Latitude: 41.6711° N
• Longitude: 89.9379° W

Location and History

Prophetstown is located in the southwestern part of Whiteside County, near the Rock River. The city was named after the Native American chief known as “The Prophet,” who lived in the region during the early 19th century. Prophetstown was founded in the 1830s and became a center for agriculture, with local farms producing grain, dairy, and livestock. The construction of the railroad in the late 19th century further contributed to the town’s growth. Today, Prophetstown maintains its small-town charm, with a focus on agriculture, local businesses, and historical preservation. The city’s location near the Rock River provides a scenic backdrop and opportunities for outdoor recreation.

Major Schools and Landmarks

Prophetstown is part of the Prophetstown-Lyndon-Tampico (PLT) School District #3, with Prophetstown High School serving the area’s students. The Prophetstown State Park, located along the Rock River, is one of the area’s most popular landmarks, offering camping, fishing, and hiking opportunities. Another significant historical site is the Prophetstown Historical Society Museum, which showcases the town’s rich Native American and pioneer history. The downtown area, with its well-preserved 19th-century architecture, offers a variety of local shops and restaurants. The annual Lighted Christmas Parade is a major event that brings the community together to celebrate the holiday season.