Marble Rock, IA Demographics

A map of Marble Rock's Population by Race

Marble Rock, Iowa has an estimated population of 191, a large decrease from the 271 recorded in the 2020 Census. The population is 93.7% White, 6.3% Multiracial, 0.0% Black, 0.0% Asian, 0.0% Hispanic, and 0.0% Native American/Other. This demographic dot map shows the population of Marble Rock, with one dot drawn for each person counted by the Census, color-coded by race.

Marble Rock has become considerably more racially diverse since the 2020 Census. It is considerably less diverse than Iowa overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Marble Rock, that probability was 2.2% in 2020 and 11.8% in the most recent ACS estimates.

Marble Rock is ranked the 705th most populous place in Iowa, out of 1,026 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Marble Rock was ranked the 599th most populous place in the 2020 Census.

Marble Rock's White Population

179 residents of Marble Rock, or 93.7% of the population, identify as White. The share of White residents in Marble Rock is considerably higher than in Iowa overall, where 82.3% of the population is White. Marble Rock ranks 31st statewide in terms of White residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Marble Rock's White population has declined by an estimated 33.2%. White residents' share of Marble Rock's population has decreased from 98.9% to 93.7%.

Marble Rock is more White than neighboring Greene (91.1% White), Rockford (89.4% White), and Dougherty (88.6% White). Marble Rock is less White than neighboring Roseville (100% White), and Rudd (94.6% White).

Marble Rock's Black Population

0 residents of Marble Rock, or 0.0% of the population, identify as Black. The share of Black residents in Marble Rock is slightly lower than in Iowa overall, where 3.8% of the population is Black. Marble Rock ranks 600th statewide in terms of Black residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Marble Rock's Black population has grown from 0 to an estimated 0. Black residents' share of Marble Rock's population has remained roughly unchanged at 0.0%.

Marble Rock is less Black than neighboring Greene (0.2% Black), Rockford (0.8% Black), and Rudd (0.8% Black).

Marble Rock's Asian Population

0 residents of Marble Rock, or 0.0% of the population, identify as Asian. The share of Asian residents in Marble Rock is slightly lower than in Iowa overall, where 2.5% of the population is Asian. Marble Rock ranks 543rd statewide in terms of Asian residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Marble Rock's Asian population has grown from 0 to an estimated 0. Asian residents' share of Marble Rock's population has remained roughly unchanged at 0.0%.

Marble Rock is less Asian than neighboring Greene (7% Asian), and Rudd (2.7% Asian).

Marble Rock's Hispanic Population

0 residents of Marble Rock, or 0.0% of the population, identify as Hispanic. The share of Hispanic residents in Marble Rock is lower than in Iowa overall, where 7.3% of the population is Hispanic. Marble Rock ranks 924th statewide in terms of Hispanic residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Marble Rock's Hispanic population has declined by an estimated 100.0%. Hispanic residents' share of Marble Rock's population has remained roughly unchanged at 0.0%.

Marble Rock is less Hispanic than neighboring Greene (0.9% Hispanic), Rockford (5.5% Hispanic), Rudd (1.2% Hispanic), and Dougherty (9.1% Hispanic).

Marble Rock's Native American/Other Population

0 residents of Marble Rock, or 0.0% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Marble Rock is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Marble Rock ranks 637th statewide in terms of Native American/Other residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Marble Rock's Native American/Other population has grown from 0 to an estimated 0. Native American/Other residents' share of Marble Rock's population has remained roughly unchanged at 0.0%.

Marble Rock is less Native American/Other than neighboring Greene (0.1% Native American/Other), and Rockford (0.5% Native American/Other).

Marble Rock's Multiracial Population

12 residents of Marble Rock, or 6.3% of the population, identify as Multiracial. The share of Multiracial residents in Marble Rock is slightly higher than in Iowa overall, where 3.5% of the population is Multiracial. Marble Rock ranks 923rd statewide in terms of Multiracial residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Marble Rock's Multiracial population has grown by an estimated 500.0%. Multiracial residents' share of Marble Rock's population has increased from 0.7% to 6.3%.

Marble Rock is more Multiracial than neighboring Roseville (0% Multiracial), Greene (0.6% Multiracial), Rockford (3.8% Multiracial), Rudd (0.6% Multiracial), and Dougherty (2.3% 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.