Cities and Towns in Sullivan County, Missouri

Founded in 1843, Sullivan County is one of 114 counties in the state of Missouri. Historically, Sullivan County was formed from Linn County. The city of Milan is the county seat. With FIPS code of 211, Sullivan County has a population of 5,934 and area of 651 square miles (1,686 km²).

List of all cities in Sullivan County, MO alphabetically

City/Town	Postal Code	Area Code
Bairdtown, MO	63556	660
Boynton, MO	63556	660
Cora, MO	63556	660
Green Castle, MO	63544	660
Green City, MO	63545	660
Harris, MO	64645	660
Humphreys, MO	64646	660
Milan, MO	63556	660
Mystic, MO	63545	660
Newtown, MO	64667	660
North Salem, MO	63566	660
Owasco, MO	63556	660
Pennville, MO	63545	660
Pollock, MO	63560	660
Reger, MO	63556	660
Sidney, MO	63544	660
Sorrell, MO	63556	660
Winigan, MO	63566	660

Major Cities and Towns in Sullivan County, Missouri

Milan

Area, Population, Zip Codes, Latitude, and Longitude

• Area: 1.20 sq mi
• Population: 1,535 (2020 Census)
• Zip Codes: 63556
• Latitude: 40.1531° N
• Longitude: 93.2376° W

Location and History

Milan is located in the northeastern part of Sullivan County, Missouri, and serves as the county seat. The town was established in the mid-19th century, with its origins dating back to the early 1850s. Milan was named after Milan, Italy, reflecting the town’s founders’ European roots. In the early years, the town developed as a small agricultural community, with settlers focused on farming, particularly corn, wheat, and livestock. The arrival of the railroad in the late 19th century spurred growth in Milan, transforming it into a regional trade center. During the 20th century, Milan continued to grow and develop, with the city playing a key role in local agriculture, manufacturing, and commerce. Milan remains a small but vital community within Sullivan County, where residents enjoy a slower-paced lifestyle while benefiting from the area’s scenic rural landscapes. The town’s central location within the county also makes it an important hub for services, government, and community events.

Major Schools and Landmarks

Milan is served by the Milan C-2 School District, which includes Milan High School, Milan Middle School, and the elementary school. The city has several landmarks of local significance, including the Sullivan County Courthouse, which serves as the hub for county government. The town is also home to the Milan City Park, which offers outdoor amenities such as sports fields, picnic areas, and walking trails. The park is a focal point for many community events, including festivals and outdoor activities. Milan’s small-town charm is reflected in its historic downtown area, where visitors can find charming brick buildings, local shops, and restaurants. The area surrounding Milan is rich in natural beauty, and residents often enjoy outdoor activities like hiking, fishing, and hunting. Milan is also near the Grand River, which provides recreational opportunities such as canoeing and fishing. The town hosts annual events, including the Milan Fair, which celebrates local agriculture, crafts, and entertainment.

Green City

Area, Population, Zip Codes, Latitude, and Longitude

• Area: 0.43 sq mi
• Population: 314 (2020 Census)
• Zip Codes: 63545
• Latitude: 40.2136° N
• Longitude: 93.1939° W

Location and History

Green City is located in the eastern part of Sullivan County, Missouri. It was settled in the mid-1800s and, like many small towns in the region, developed as an agricultural community. The town was named for the surrounding area, which was once densely forested with oak and hickory trees, giving the area a lush, green appearance. Green City was incorporated in 1871 and became an important local center for farming and commerce. In its early years, the town’s economy was based on crops such as corn and wheat, as well as livestock, which played an integral role in the community’s development. Green City’s location along the Grand River contributed to its growth, as it served as a trading post for local farmers. The town has maintained its small-town character while evolving over the years to meet the needs of its residents. While the surrounding rural areas remain devoted to agriculture, Green City continues to serve as a quiet and picturesque place to live, with easy access to nearby cities and recreational opportunities.

Major Schools and Landmarks

Green City is served by the Green City R-I School District, which includes Green City High School and several elementary and middle school options. The town is known for its tight-knit community and its peaceful, rural atmosphere. While Green City doesn’t have a wide range of commercial landmarks, the town does offer parks and recreational spaces, such as the Green City Park, which features picnic areas, sports fields, and a playground. The area surrounding Green City is rich in natural beauty, and outdoor enthusiasts enjoy hiking, hunting, and fishing along the Grand River and in nearby woodlands. The town is also home to a number of locally-owned businesses, providing essential services to the community. The nearby Grand River offers fishing and canoeing opportunities, and the area is known for its picturesque landscapes, especially during the changing of the seasons. Green City also hosts a number of local events and festivals throughout the year, providing opportunities for residents to come together and celebrate their community.

Humphreys

Area, Population, Zip Codes, Latitude, and Longitude

• Area: 0.48 sq mi
• Population: 141 (2020 Census)
• Zip Codes: 64646
• Latitude: 40.1186° N
• Longitude: 93.0658° W

Location and History

Humphreys is located in the central part of Sullivan County, Missouri. The town was established in the late 19th century and named after a local family who were prominent in the area during the town’s founding. Like many towns in rural Missouri, Humphreys grew as a farming community, with early settlers raising crops such as corn, wheat, and oats, as well as livestock. The town’s rural location and proximity to the Grand River made it an attractive place for farming and trade. Over the years, Humphreys has remained a quiet, agricultural-based community with a small population. While many residents are still involved in farming and agriculture, the town has retained a more residential feel, providing a peaceful lifestyle for its inhabitants. Despite its small size, Humphreys is a key part of Sullivan County’s rural fabric, offering a serene environment that is perfect for those seeking a slower pace of life in the heart of Missouri’s countryside.

Major Schools and Landmarks

Humphreys is served by the Laredo R-VII School District, which provides education for the children of Humphreys and surrounding rural communities. The town does not have many major landmarks, but it offers a quiet, peaceful environment that is ideal for outdoor activities. The surrounding farmland and rural roads are perfect for hiking, horseback riding, and driving, providing picturesque views of the rolling Missouri countryside. The town is also located near the Grand River, which offers recreational activities such as fishing, canoeing, and bird watching. Though small, Humphreys benefits from the region’s natural beauty, with nearby parks and forests offering opportunities for wildlife viewing and camping. Local events often center around agriculture and community gatherings, with the town’s rural charm and heritage celebrated through small-town festivals and seasonal markets. Humphreys is also close to larger cities in Sullivan County, providing easy access to additional services and entertainment options.

Sullivan County

Area, Population, Zip Codes, Latitude, and Longitude

• Area: 0.92 sq mi
• Population: 200 (2020 Census)
• Zip Codes: 63556
• Latitude: 40.0972° N
• Longitude: 93.3698° W

Location and History

Sullivan County is a small, rural county located in northern Missouri. It was founded in 1845 and named after John Sullivan, a prominent Revolutionary War general. The county has remained primarily agricultural throughout its history, with a focus on crops such as corn, soybeans, and wheat, as well as livestock farming. The county seat, Milan, is where the county government is based, and other smaller towns such as Green City, Humphreys, and Newtown play vital roles in the county’s rural economy. The county has faced challenges with population decline as younger generations have moved to larger cities for job opportunities, but it still maintains a strong rural character and continues to attract visitors for its agricultural heritage and natural beauty. The county is also home to several parks and recreational areas that attract those seeking outdoor activities, such as fishing, hunting, and camping. Sullivan County’s history is closely tied to the land and its farming traditions, which have shaped the area’s culture and way of life.

Major Schools and Landmarks

Sullivan County is served by several school districts, including the Milan C-2 School District, the Green City R-I School District, and the Laredo R-VII School District, which serve the county’s rural population. The county’s main landmarks include the Sullivan County Courthouse in Milan and several small, local historical sites that commemorate the county’s agricultural roots. The area is rich in natural beauty, with several outdoor recreation spots located along the Grand River, which runs through the county. The county’s parks and recreational areas offer opportunities for fishing, camping, and hiking, especially in the more remote parts of the county. Sullivan County also hosts various local events and festivals, such as county fairs and seasonal celebrations, which highlight the agricultural heritage of the area. Additionally, the county’s scenic rural landscapes make it an appealing destination for visitors seeking a slower pace of life and a connection to the natural environment.