Rock County Demographics

A map of Rock County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	1,300	1,219	98.6%	96.6%
Hispanic	10	20	0.8%	1.6%
Multiracial	5	17	0.4%	1.3%
Native American/Other	3	3	0.2%	0.2%
Black	1	3	0.1%	0.2%
Asian	0	0	0.0%	0.0%

Rock County, Nebraska has an estimated population of 1,319, an increase from the 1,262 recorded in the 2020 Census. The population is 98.6% White, 0.8% Hispanic, 0.4% Multiracial, 0.2% Native American/Other, 0.1% Black, and 0.0% Asian. This demographic dot map shows the population of Rock County, with one dot drawn for each person counted by the Census, color-coded by race.

Rock has become less racially diverse since the 2020 Census. It is considerably less diverse than Nebraska overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Rock County, that probability was 6.7% in 2020 and 2.9% in the most recent ACS estimates.

Rock County is ranked the 80th most populous county in Nebraska, out of 93 counties. Rock County was ranked the 80th most populous county in the 2020 Census.

Rock County's White Population

1,300 residents of Rock County, or 98.6% of the population, identify as White. The share of White residents in Rock County is significantly higher than in Nebraska overall, where 75.3% of the population is White. Rock County ranks 2nd statewide in terms of White residents as a share of the population, out of 93 counties.

Since the 2020 Census, Rock County's White population has grown by an estimated 6.6%. White residents' share of Rock County's population has increased from 96.6% to 98.6%.

Rock County is more White than neighboring Brown County (88.5% White), Loup County (87.5% White), Keya Paha County (93.1% White), Holt County (90.9% White), and Garfield County (96.7% White).

Rock County's Black Population

1 residents of Rock County, or 0.1% of the population, identify as Black. The share of Black residents in Rock County is slightly lower than in Nebraska overall, where 4.6% of the population is Black. Rock County ranks 57th statewide in terms of Black residents as a share of the population, out of 93 counties.

Since the 2020 Census, Rock County's Black population has declined by an estimated 66.7%. Black residents' share of Rock County's population has remained roughly unchanged at 0.1%.

Rock County is more Black than neighboring Brown County (0% Black), and Loup County (0% Black). Rock County is less Black than neighboring Holt County (0.4% Black), and Garfield County (0.2% Black).

Rock County's Asian Population

0 residents of Rock County, or 0.0% of the population, identify as Asian. The share of Asian residents in Rock County is slightly lower than in Nebraska overall, where 2.6% of the population is Asian. Rock County ranks 85th statewide in terms of Asian residents as a share of the population, out of 93 counties.

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

Rock County is less Asian than neighboring Holt County (0.2% Asian).

Rock County's Hispanic Population

10 residents of Rock County, or 0.8% of the population, identify as Hispanic. The share of Hispanic residents in Rock County is considerably lower than in Nebraska overall, where 12.7% of the population is Hispanic. Rock County ranks 89th statewide in terms of Hispanic residents as a share of the population, out of 93 counties.

Since the 2020 Census, Rock County's Hispanic population has declined by an estimated 50.0%. Hispanic residents' share of Rock County's population has decreased from 1.6% to 0.8%.

Rock County is less Hispanic than neighboring Brown County (6.2% Hispanic), Loup County (8.5% Hispanic), Keya Paha County (4.6% Hispanic), Holt County (5.7% Hispanic), and Garfield County (1.7% Hispanic).

Rock County's Native American/Other Population

3 residents of Rock 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 Rock County is comparable to the share in Nebraska overall, where 1% of the population is Native American/Other. Rock County ranks 81st statewide in terms of Native American/Other residents as a share of the population, out of 93 counties.

Since the 2020 Census, Rock County's Native American/Other population has remained roughly the same. Native American/Other residents' share of Rock County's population has remained roughly unchanged at 0.2%.

Rock County is more Native American/Other than neighboring Garfield County (0.1% Native American/Other). Rock County is less Native American/Other than neighboring Brown County (0.9% Native American/Other), Loup County (0.7% Native American/Other), Keya Paha County (1.9% Native American/Other), and Holt County (0.7% Native American/Other).

Rock County's Multiracial Population

5 residents of Rock County, or 0.4% of the population, identify as Multiracial. The share of Multiracial residents in Rock County is slightly lower than in Nebraska overall, where 3.8% of the population is Multiracial. Rock County ranks 90th statewide in terms of Multiracial residents as a share of the population, out of 93 counties.

Since the 2020 Census, Rock County's Multiracial population has declined by an estimated 70.6%. Multiracial residents' share of Rock County's population has decreased from 1.3% to 0.4%.

Rock County is more Multiracial than neighboring Keya Paha County (0.2% Multiracial). Rock County is less Multiracial than neighboring Brown County (4.4% Multiracial), Loup County (3.3% Multiracial), Holt County (2% Multiracial), and Garfield County (1.2% 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.