Sullivan County Demographics

A map of Sullivan County's Population by Race

Sullivan County, Missouri has an estimated population of 5,857, a slight decrease from the 5,999 recorded in the 2020 Census. The population is 76.8% White, 18.1% Hispanic, 2.7% Black, 1.2% Multiracial, 1.0% Asian, and 0.2% Native American/Other. This demographic dot map shows the population of Sullivan County, with one dot drawn for each person counted by the Census, color-coded by race.

Sullivan has become less racially diverse since the 2020 Census. It is less diverse than Missouri overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Sullivan County, that probability was 40.3% in 2020 and 37.6% in the most recent ACS estimates.

Sullivan County is ranked the 106th most populous county in Missouri, out of 115 counties. Sullivan County was ranked the 106th most populous county in the 2020 Census.

Sullivan County's White Population

4,501 residents of Sullivan County, or 76.8% of the population, identify as White. The share of White residents in Sullivan County is comparable to the share in Missouri overall, where 76.3% of the population is White. Sullivan County ranks 106th statewide in terms of White residents as a share of the population, out of 115 counties.

Since the 2020 Census, Sullivan County's White population has remained roughly the same. White residents' share of Sullivan County's population has increased from 75.1% to 76.8%.

Sullivan County is less White than neighboring Putnam County (95.1% White), Linn County (93.7% White), Grundy County (92.1% White), Mercer County (91.1% White), and Adair County (87.1% White).

Sullivan County's Black Population

156 residents of Sullivan County, or 2.7% of the population, identify as Black. The share of Black residents in Sullivan County is lower than in Missouri overall, where 10.9% of the population is Black. Sullivan County ranks 31st statewide in terms of Black residents as a share of the population, out of 115 counties.

Since the 2020 Census, Sullivan County's Black population has declined by an estimated 25.0%. Black residents' share of Sullivan County's population has decreased from 3.5% to 2.7%.

Sullivan County is more Black than neighboring Putnam County (0.2% Black), Linn County (0.8% Black), Grundy County (0.4% Black), and Mercer County (0.2% Black). Sullivan County is less Black than neighboring Adair County (4.4% Black).

Sullivan County's Asian Population

60 residents of Sullivan County, or 1.0% of the population, identify as Asian. The share of Asian residents in Sullivan County is comparable to the share in Missouri overall, where 2.1% of the population is Asian. Sullivan County ranks 41st statewide in terms of Asian residents as a share of the population, out of 115 counties.

Since the 2020 Census, Sullivan County's Asian population has grown by an estimated 106.9%. Asian residents' share of Sullivan County's population has increased from 0.5% to 1.0%.

Sullivan County is more Asian than neighboring Putnam County (0% Asian), Linn County (0.4% Asian), Grundy County (0.7% Asian), and Mercer County (0.9% Asian). Sullivan County is less Asian than neighboring Adair County (2.1% Asian).

Sullivan County's Hispanic Population

1,059 residents of Sullivan County, or 18.1% of the population, identify as Hispanic. The share of Hispanic residents in Sullivan County is considerably higher than in Missouri overall, where 5.2% of the population is Hispanic. Sullivan County ranks 1st statewide in terms of Hispanic residents as a share of the population, out of 115 counties.

Since the 2020 Census, Sullivan County's Hispanic population has remained roughly the same. Hispanic residents' share of Sullivan County's population has increased from 17.6% to 18.1%.

Sullivan County is more Hispanic than neighboring Putnam County (3% Hispanic), Linn County (3% Hispanic), Grundy County (2.8% Hispanic), Mercer County (4.8% Hispanic), and Adair County (3% Hispanic).

Sullivan County's Native American/Other Population

12 residents of Sullivan County, or 0.2% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Sullivan County is comparable to the share in Missouri overall, where 0.7% of the population is Native American/Other. Sullivan County ranks 58th statewide in terms of Native American/Other residents as a share of the population, out of 115 counties.

Since the 2020 Census, Sullivan County's Native American/Other population has declined by an estimated 70.7%. Native American/Other residents' share of Sullivan County's population has remained roughly unchanged at 0.2%.

Sullivan County is less Native American/Other than neighboring Putnam County (0.4% Native American/Other), Linn County (0.3% Native American/Other), Grundy County (0.6% Native American/Other), Mercer County (0.4% Native American/Other), and Adair County (0.3% Native American/Other).

Sullivan County's Multiracial Population

69 residents of Sullivan County, or 1.2% of the population, identify as Multiracial. The share of Multiracial residents in Sullivan County is slightly lower than in Missouri overall, where 4.8% of the population is Multiracial. Sullivan County ranks 109th statewide in terms of Multiracial residents as a share of the population, out of 115 counties.

Since the 2020 Census, Sullivan County's Multiracial population has declined by an estimated 56.9%. Multiracial residents' share of Sullivan County's population has decreased from 2.7% to 1.2%.

Sullivan County is less Multiracial than neighboring Putnam County (1.3% Multiracial), Linn County (1.8% Multiracial), Grundy County (3.4% Multiracial), Mercer County (2.6% Multiracial), and Adair County (3.1% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.