Ionia County Demographics

A map of Ionia County's Population by Race

Ionia County, Michigan has an estimated population of 66,574, a less than 1% change from the 66,804 recorded in the 2020 Census. The population is 85.3% White, 5.3% Hispanic, 4.8% Multiracial, 3.3% Black, 0.9% Native American/Other, and 0.5% Asian. This demographic dot map shows the population of Ionia County, with one dot drawn for each person counted by the Census, color-coded by race.

Ionia has become more racially diverse since the 2020 Census. It is considerably less diverse than Michigan overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Ionia County, that probability was 25.0% in 2020 and 26.6% in the most recent ACS estimates.

Ionia County is ranked the 30th most populous county in Michigan, out of 83 counties. Ionia County was ranked the 28th most populous county in the 2020 Census.

Ionia County's White Population

56,781 residents of Ionia County, or 85.3% of the population, identify as White. The share of White residents in Ionia County is considerably higher than in Michigan overall, where 72.4% of the population is White. Ionia County ranks 52nd statewide in terms of White residents as a share of the population, out of 83 counties.

Since the 2020 Census, Ionia County's White population has declined by an estimated 1.5%. White residents' share of Ionia County's population has decreased from 86.2% to 85.3%.

Ionia County is more White than neighboring Eaton County (79.8% White), and Kent County (70.4% White). Ionia County is less White than neighboring Montcalm County (87% White), Barry County (91.8% White), and Clinton County (87.3% White).

Ionia County's Black Population

2,212 residents of Ionia County, or 3.3% of the population, identify as Black. The share of Black residents in Ionia County is lower than in Michigan overall, where 13.1% of the population is Black. Ionia County ranks 20th statewide in terms of Black residents as a share of the population, out of 83 counties.

Since the 2020 Census, Ionia County's Black population has declined by an estimated 31.1%. Black residents' share of Ionia County's population has decreased from 4.8% to 3.3%.

Ionia County is more Black than neighboring Montcalm County (3.2% Black), Barry County (0.3% Black), and Clinton County (1.8% Black). Ionia County is less Black than neighboring Eaton County (6.7% Black), and Kent County (9.4% Black).

Ionia County's Asian Population

304 residents of Ionia County, or 0.5% of the population, identify as Asian. The share of Asian residents in Ionia County is slightly lower than in Michigan overall, where 3.4% of the population is Asian. Ionia County ranks 58th statewide in terms of Asian residents as a share of the population, out of 83 counties.

Since the 2020 Census, Ionia County's Asian population has grown by an estimated 32.8%. Asian residents' share of Ionia County's population has remained roughly unchanged at 0.5%.

Ionia County is more Asian than neighboring Montcalm County (0.2% Asian). Ionia County is less Asian than neighboring Barry County (0.6% Asian), Eaton County (2.2% Asian), Clinton County (1.5% Asian), and Kent County (3.2% Asian).

Ionia County's Hispanic Population

3,539 residents of Ionia County, or 5.3% of the population, identify as Hispanic. The share of Hispanic residents in Ionia County is comparable to the share in Michigan overall, where 5.9% of the population is Hispanic. Ionia County ranks 22nd statewide in terms of Hispanic residents as a share of the population, out of 83 counties.

Since the 2020 Census, Ionia County's Hispanic population has grown by an estimated 5.2%. Hispanic residents' share of Ionia County's population has remained roughly unchanged at 5.3%.

Ionia County is more Hispanic than neighboring Montcalm County (4.5% Hispanic), Barry County (3.7% Hispanic), and Clinton County (5.2% Hispanic). Ionia County is less Hispanic than neighboring Eaton County (6.3% Hispanic), and Kent County (11.7% Hispanic).

Ionia County's Native American/Other Population

573 residents of Ionia County, or 0.9% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Ionia County is comparable to the share in Michigan overall, where 0.8% of the population is Native American/Other. Ionia County ranks 75th statewide in terms of Native American/Other residents as a share of the population, out of 83 counties.

Since the 2020 Census, Ionia County's Native American/Other population has grown by an estimated 54.0%. Native American/Other residents' share of Ionia County's population has remained roughly unchanged at 0.9%.

Ionia County is more Native American/Other than neighboring Montcalm County (0.8% Native American/Other), Barry County (0.5% Native American/Other), Eaton County (0.8% Native American/Other), Clinton County (0.7% Native American/Other), and Kent County (0.7% Native American/Other).

Ionia County's Multiracial Population

3,165 residents of Ionia County, or 4.8% of the population, identify as Multiracial. The share of Multiracial residents in Ionia County is comparable to the share in Michigan overall, where 4.5% of the population is Multiracial. Ionia County ranks 79th statewide in terms of Multiracial residents as a share of the population, out of 83 counties.

Since the 2020 Census, Ionia County's Multiracial population has grown by an estimated 57.3%. Multiracial residents' share of Ionia County's population has increased from 3.0% to 4.8%.

Ionia County is more Multiracial than neighboring Montcalm County (4.4% Multiracial), Barry County (3.1% Multiracial), Eaton County (4.1% Multiracial), Clinton County (3.4% Multiracial), and Kent County (4.6% 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.