Grundy County Demographics

A map of Grundy County's Population by Race

Grundy County, Iowa had a population of 12,329 in 2020. It was 95.6% White, 0.3% Black, 0.2% Asian, 1.2% Hispanic, 0.2% Native American/Other, and 2.4% Multiracial. This map presents the population of Grundy County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Grundy County is the 60th most populous county of the 99 counties in Iowa.

Grundy County's White Population

11,791 residents of Grundy County identify as White, or 95.6%. This makes the White share of the population of Grundy County larger than the White share of the population of Iowa (82.7% White). Of the 99 counties in Iowa, Grundy County is ranked #5 in terms of White residents as a share of the population.

Grundy County is more White than neighboring Tama County (77.5% White), Marshall County (68.4% White), Hardin County (90.6% White), and Black Hawk County (77.1% White). Grundy County is less White than neighboring Butler County (95.9% White).

Grundy County's Black Population

43 residents of Grundy County identify as Black, or 0.3%. This makes the Black share of the population of Grundy County roughly similar to the Black share of the population of Iowa (4.1% Black). Of the 99 counties in Iowa, Grundy County is ranked #78 in terms of Black residents as a share of the population.

Grundy County is more Black than neighboring Butler County (0.2% Black). Grundy County is less Black than neighboring Tama County (0.7% Black), Marshall County (2% Black), Hardin County (0.9% Black), and Black Hawk County (10.3% Black).

Grundy County's Asian Population

24 residents of Grundy County identify as Asian, or 0.2%. This makes the Asian share of the population of Grundy County roughly similar to the Asian share of the population of Iowa (2.4% Asian). Of the 99 counties in Iowa, Grundy County is ranked #94 in terms of Asian residents as a share of the population.

Grundy County is less Asian than neighboring Tama County (0.5% Asian), Marshall County (3.8% Asian), Hardin County (0.5% Asian), and Black Hawk County (2.6% Asian).

Grundy County's Hispanic Population

145 residents of Grundy County identify as Hispanic, or 1.2%. This makes the Hispanic share of the population of Grundy County slightly less than the Hispanic share of the population of Iowa (6.8% Hispanic). Of the 99 counties in Iowa, Grundy County is ranked #97 in terms of Hispanic residents as a share of the population.

Grundy County is less Hispanic than neighboring Butler County (1.3% Hispanic), Tama County (10.5% Hispanic), Marshall County (22.8% Hispanic), Hardin County (4.8% Hispanic), and Black Hawk County (4.9% Hispanic).

Grundy County's Native American/Other Population

25 residents of Grundy County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.2%. This makes the Native American/Other share of the population of Grundy County roughly similar to the Native American/Other share of the population of Iowa (0.7% Native American/Other). Of the 99 counties in Iowa, Grundy County is ranked #92 in terms of Native American/Other residents as a share of the population.

Grundy County is less Native American/Other than neighboring Tama County (7.5% Native American/Other), Marshall County (0.6% Native American/Other), Hardin County (0.3% Native American/Other), and Black Hawk County (1.1% Native American/Other).

Grundy County's Multiracial Population

301 residents of Grundy County identify as Multiracial, or 2.4%. This makes the Multiracial share of the population of Grundy County roughly similar to the Multiracial share of the population of Iowa (3.4% Multiracial). Of the 99 counties in Iowa, Grundy County is ranked #54 in terms of Multiracial residents as a share of the population.

Grundy County is more Multiracial than neighboring Butler County (2.2% Multiracial). Grundy County is less Multiracial than neighboring Tama County (3.2% Multiracial), Marshall County (2.5% Multiracial), Hardin County (2.8% Multiracial), and Black Hawk County (3.9% Multiracial).

Source: 2020 Census State Redistricting Data and Census TIGER/Line Shapefiles.