Grimes County Demographics

A map of Grimes County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	17,787	16,910	56.8%	57.8%
Hispanic	7,998	7,361	25.5%	25.2%
Black	3,557	3,824	11.3%	13.1%
Multiracial	1,262	894	4.0%	3.1%
Native American/Other	620	177	2.0%	0.6%
Asian	116	102	0.4%	0.3%

Grimes County, Texas has an estimated population of 31,340, an increase from the 29,268 recorded in the 2020 Census. The population is 56.8% White, 25.5% Hispanic, 11.3% Black, 4.0% Multiracial, 2.0% Native American/Other, and 0.4% Asian. This demographic dot map shows the population of Grimes County, with one dot drawn for each person counted by the Census, color-coded by race.

Grimes has become more racially diverse since the 2020 Census. It is considerably less diverse than Texas overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Grimes County, that probability was 58.5% in 2020 and 59.8% in the most recent ACS estimates.

Grimes County is ranked the 92nd most populous county in Texas, out of 254 counties. Grimes County was ranked the 95th most populous county in the 2020 Census.

Grimes County's White Population

17,787 residents of Grimes County, or 56.8% of the population, identify as White. The share of White residents in Grimes County is significantly higher than in Texas overall, where 39.1% of the population is White. Grimes County ranks 129th statewide in terms of White residents as a share of the population, out of 254 counties.

Since the 2020 Census, Grimes County's White population has grown by an estimated 5.2%. White residents' share of Grimes County's population has decreased from 57.8% to 56.8%.

Grimes County is more White than neighboring Brazos County (53% White), Madison County (52.3% White), Walker County (53% White), and Waller County (38.1% White). Grimes County is less White than neighboring Washington County (61.4% White).

Grimes County's Black Population

3,557 residents of Grimes County, or 11.3% of the population, identify as Black. The share of Black residents in Grimes County is comparable to the share in Texas overall, where 11.9% of the population is Black. Grimes County ranks 39th statewide in terms of Black residents as a share of the population, out of 254 counties.

Since the 2020 Census, Grimes County's Black population has declined by an estimated 7.0%. Black residents' share of Grimes County's population has decreased from 13.1% to 11.3%.

Grimes County is more Black than neighboring Brazos County (10.1% Black). Grimes County is less Black than neighboring Madison County (15.3% Black), Walker County (19.6% Black), Washington County (14.2% Black), and Waller County (23.4% Black).

Grimes County's Asian Population

116 residents of Grimes County, or 0.4% of the population, identify as Asian. The share of Asian residents in Grimes County is lower than in Texas overall, where 5.5% of the population is Asian. Grimes County ranks 181st statewide in terms of Asian residents as a share of the population, out of 254 counties.

Since the 2020 Census, Grimes County's Asian population has grown by an estimated 13.7%. Asian residents' share of Grimes County's population has remained roughly unchanged at 0.4%.

Grimes County is less Asian than neighboring Brazos County (5.8% Asian), Madison County (1.1% Asian), Walker County (1% Asian), Washington County (1.4% Asian), and Waller County (2% Asian).

Grimes County's Hispanic Population

7,998 residents of Grimes County, or 25.5% of the population, identify as Hispanic. The share of Hispanic residents in Grimes County is considerably lower than in Texas overall, where 39.7% of the population is Hispanic. Grimes County ranks 141st statewide in terms of Hispanic residents as a share of the population, out of 254 counties.

Since the 2020 Census, Grimes County's Hispanic population has grown by an estimated 8.7%. Hispanic residents' share of Grimes County's population has remained roughly unchanged at 25.5%.

Grimes County is more Hispanic than neighboring Walker County (21.8% Hispanic), and Washington County (18.5% Hispanic). Grimes County is less Hispanic than neighboring Brazos County (27.4% Hispanic), Madison County (26.2% Hispanic), and Waller County (33.5% Hispanic).

Grimes County's Native American/Other Population

620 residents of Grimes County, or 2.0% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Grimes County is comparable to the share in Texas overall, where 0.6% of the population is Native American/Other. Grimes County ranks 156th statewide in terms of Native American/Other residents as a share of the population, out of 254 counties.

Since the 2020 Census, Grimes County's Native American/Other population has grown by an estimated 250.3%. Native American/Other residents' share of Grimes County's population has increased from 0.6% to 2.0%.

Grimes County is more Native American/Other than neighboring Brazos County (0.6% Native American/Other), Madison County (0.3% Native American/Other), Walker County (0.8% Native American/Other), Washington County (0.6% Native American/Other), and Waller County (0.3% Native American/Other).

Grimes County's Multiracial Population

1,262 residents of Grimes County, or 4.0% of the population, identify as Multiracial. The share of Multiracial residents in Grimes County is comparable to the share in Texas overall, where 3.1% of the population is Multiracial. Grimes County ranks 112th statewide in terms of Multiracial residents as a share of the population, out of 254 counties.

Since the 2020 Census, Grimes County's Multiracial population has grown by an estimated 41.2%. Multiracial residents' share of Grimes County's population has increased from 3.1% to 4.0%.

Grimes County is more Multiracial than neighboring Brazos County (3.1% Multiracial), Walker County (3.8% Multiracial), Washington County (3.9% Multiracial), and Waller County (2.6% Multiracial). Grimes County is less Multiracial than neighboring Madison County (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.