RoadsideThoughts
A Gazetteer for the United States and Canada
Home >> State of Missouri >> Sullivan County  

Welcome to Sullivan County ...

Time Zone: Sullivan County lies in the Central Time Zone (CST/CDT) and observes daylight saving time.

The community of Milan is the Seat for Sullivan County.

Sullivan County was founded in 1843 and was created by taking area from Linn County.

From the Census Estimates for 2019, <1> Sullivan had a population of 6,089 people. This is a decrease of 9.62% since the last Census (which gave a population of 6,737 people in 2010).

At the time of the 2010 Census, Sullivan represented 0.11% of the total population of Missouri.

Below are some of the communities located in Sullivan County:

  • Green City
    (10 miles [16.1 km] to the east)
    • Green City is located in Sullivan County (MO)
    • Jump to our Gazetteer entry for Green City
    • Population from the 2020 Census: 582 people
  • Greencastle
    (13 miles [20.9 km] to the east)
  • Harris
    (13 miles [20.9 km] to the northwest)
    • Harris is located in Sullivan County (MO)
    • Jump to our Gazetteer entry for Harris
    • Population from the 2020 Census: 55 people
    • Jump to TripAdvisor's Tourism page for Harris <2>
  • Humphreys
    (11 miles [17.7 km] to the southwest)
    • Humphreys is located in Sullivan County (MO)
    • Jump to our Gazetteer entry for Humphreys
    • Population from the 2020 Census: 107 people
  • Milan
    (Less than 2 miles to the southeast)
    • Milan is located in Sullivan County (MO)
    • Jump to our Gazetteer entry for Milan
    • Population from the 2020 Census: 1,764 people
    • Jump to TripAdvisor's Tourism page for Milan <2>
  • Newtown
    (15 miles [24.1 km] to the northwest)
    • Newtown is located in Sullivan County (MO)
    • Jump to our Gazetteer entry for Newtown
    • Population from the 2020 Census: 163 people
    • Jump to TripAdvisor's Tourism page for Newtown <2>
  • Osgood
    (11 miles [17.7 km] to the west)
    • Osgood is located in Sullivan County (MO)
    • Jump to our Gazetteer entry for Osgood
    • Population from the 2020 Census: 42 people
  • Pollock
    (10 miles [16.1 km] to the north)
    • Pollock is located in Sullivan County (MO)
    • Jump to our Gazetteer entry for Pollock
    • Population from the 2020 Census: 79 people

Websites of Interest ...

Footnotes ...

<1>On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2010 Census and the next count will be for the 2020 Census.
<2>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.