Rock Valley, IA Demographics

A map of Rock Valley's Population by Race

Rock Valley, Iowa has an estimated population of 4,059, a less than 1% change from the 4,059 recorded in the 2020 Census. The population is 60.9% White, 38.1% Hispanic, 0.5% Asian, 0.4% Multiracial, 0.0% Black, and 0.0% Native American/Other. This demographic dot map shows the population of Rock Valley, with one dot drawn for each person counted by the Census, color-coded by race.

Rock Valley has become considerably more racially diverse since the 2020 Census. It is considerably more 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 Rock Valley, that probability was 36.2% in 2020 and 48.4% in the most recent ACS estimates.

Rock Valley is ranked the 103rd 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). Rock Valley was ranked the 102nd most populous place in the 2020 Census.

Rock Valley's White Population

2,473 residents of Rock Valley, or 60.9% of the population, identify as White. The share of White residents in Rock Valley is significantly lower than in Iowa overall, where 82.3% of the population is White. Rock Valley ranks 976th statewide in terms of White residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Rock Valley's White population has declined by an estimated 20.8%. White residents' share of Rock Valley's population has decreased from 76.9% to 60.9%.

Rock Valley is less White than neighboring Doon (99.4% White), Alvord (94.2% White), Hull (86.2% White), Sioux Center (83.3% White), and Inwood (90.4% White).

Rock Valley's Black Population

0 residents of Rock Valley, or 0.0% of the population, identify as Black. The share of Black residents in Rock Valley is slightly lower than in Iowa overall, where 3.8% of the population is Black. Rock Valley ranks 438th statewide in terms of Black residents as a share of the population, out of 1,026 places.

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

Rock Valley is less Black than neighboring Alvord (1.2% Black), Hull (0.4% Black), Sioux Center (0.6% Black), and Inwood (0.6% Black).

Rock Valley's Asian Population

22 residents of Rock Valley, or 0.5% of the population, identify as Asian. The share of Asian residents in Rock Valley is comparable to the share in Iowa overall, where 2.5% of the population is Asian. Rock Valley ranks 475th statewide in terms of Asian residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Rock Valley's Asian population has grown by an estimated 175.0%. Asian residents' share of Rock Valley's population has remained roughly unchanged at 0.5%.

Rock Valley is more Asian than neighboring Doon (0% Asian), Hull (0% Asian), and Inwood (0% Asian). Rock Valley is less Asian than neighboring Alvord (2.3% Asian), and Sioux Center (1.2% Asian).

Rock Valley's Hispanic Population

1,546 residents of Rock Valley, or 38.1% of the population, identify as Hispanic. The share of Hispanic residents in Rock Valley is significantly higher than in Iowa overall, where 7.3% of the population is Hispanic. Rock Valley ranks 30th statewide in terms of Hispanic residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Rock Valley's Hispanic population has grown by an estimated 77.7%. Hispanic residents' share of Rock Valley's population has increased from 21.4% to 38.1%.

Rock Valley is more Hispanic than neighboring Doon (0.2% Hispanic), Alvord (0% Hispanic), Hull (13.1% Hispanic), Sioux Center (12.8% Hispanic), and Inwood (4.2% Hispanic).

Rock Valley's Native American/Other Population

0 residents of Rock Valley, 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 Rock Valley is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Rock Valley ranks 636th statewide in terms of Native American/Other residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Rock Valley's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of Rock Valley's population has remained roughly unchanged at 0.0%.

Rock Valley is less Native American/Other than neighboring Hull (0.2% Native American/Other), and Sioux Center (0.8% Native American/Other).

Rock Valley's Multiracial Population

18 residents of Rock Valley, or 0.4% of the population, identify as Multiracial. The share of Multiracial residents in Rock Valley is slightly lower than in Iowa overall, where 3.5% of the population is Multiracial. Rock Valley ranks 894th statewide in terms of Multiracial residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Rock Valley's Multiracial population has declined by an estimated 56.1%. Multiracial residents' share of Rock Valley's population has decreased from 1.0% to 0.4%.

Rock Valley is more Multiracial than neighboring Hull (0% Multiracial). Rock Valley is less Multiracial than neighboring Alvord (2.3% Multiracial), Sioux Center (1.3% Multiracial), and Inwood (4.8% 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.