Groton, CT Demographics

A map of Groton's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	6,362	5,408	67.0%	57.6%
Hispanic	1,175	1,810	12.4%	19.3%
Black	755	749	8.0%	8.0%
Asian	569	577	6.0%	6.1%
Multiracial	560	675	5.9%	7.2%
Native American/Other	69	168	0.7%	1.8%

Groton, Connecticut has an estimated population of 9,490, a slight increase from the 9,387 recorded in the 2020 Census. The population is 67.0% White, 12.4% Hispanic, 8.0% Black, 6.0% Asian, 5.9% Multiracial, and 0.7% Native American/Other. This demographic dot map shows the population of Groton, with one dot drawn for each person counted by the Census, color-coded by race.

Groton has become considerably less racially diverse since the 2020 Census. It is less diverse than Connecticut overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Groton, that probability was 61.5% in 2020 and 52.2% in the most recent ACS estimates.

Groton is ranked the 38th most populous place in Connecticut, out of 215 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). Groton was ranked the 38th most populous place in the 2020 Census.

Groton's White Population

6,362 residents of Groton, or 67.0% of the population, identify as White. The share of White residents in Groton is higher than in Connecticut overall, where 61.9% of the population is White. Groton ranks 194th statewide in terms of White residents as a share of the population, out of 215 places.

Since the 2020 Census, Groton's White population has grown by an estimated 17.6%. White residents' share of Groton's population has increased from 57.6% to 67.0%.

Groton is more White than neighboring New London (44.4% White), Long Hill CDP (Southeastern Connecticut County) (56.6% White), Poquonock Bridge (51.7% White), Conning Towers-Nautilus Park (60.5% White), and Waterford (62.9% White).

Groton's Black Population

755 residents of Groton, or 8.0% of the population, identify as Black. The share of Black residents in Groton is comparable to the share in Connecticut overall, where 9.8% of the population is Black. Groton ranks 26th statewide in terms of Black residents as a share of the population, out of 215 places.

Since the 2020 Census, Groton's Black population has remained roughly the same. Black residents' share of Groton's population has remained roughly unchanged at 8.0%.

Groton is more Black than neighboring Long Hill CDP (Southeastern Connecticut County) (4.1% Black), Conning Towers-Nautilus Park (6.5% Black), and Waterford (6.6% Black). Groton is less Black than neighboring New London (12.9% Black), and Poquonock Bridge (11% Black).

Groton's Asian Population

569 residents of Groton, or 6.0% of the population, identify as Asian. The share of Asian residents in Groton is comparable to the share in Connecticut overall, where 4.7% of the population is Asian. Groton ranks 43rd statewide in terms of Asian residents as a share of the population, out of 215 places.

Since the 2020 Census, Groton's Asian population has declined by an estimated 1.4%. Asian residents' share of Groton's population has remained roughly unchanged at 6.0%.

Groton is more Asian than neighboring New London (2.6% Asian), Poquonock Bridge (0.5% Asian), Conning Towers-Nautilus Park (3.2% Asian), and Waterford (4.6% Asian). Groton is less Asian than neighboring Long Hill CDP (Southeastern Connecticut County) (20.9% Asian).

Groton's Hispanic Population

1,175 residents of Groton, or 12.4% of the population, identify as Hispanic. The share of Hispanic residents in Groton is lower than in Connecticut overall, where 18.3% of the population is Hispanic. Groton ranks 21st statewide in terms of Hispanic residents as a share of the population, out of 215 places.

Since the 2020 Census, Groton's Hispanic population has declined by an estimated 35.1%. Hispanic residents' share of Groton's population has decreased from 19.3% to 12.4%.

Groton is more Hispanic than neighboring Long Hill CDP (Southeastern Connecticut County) (11.7% Hispanic). Groton is less Hispanic than neighboring New London (35.5% Hispanic), Poquonock Bridge (31.4% Hispanic), Conning Towers-Nautilus Park (19.1% Hispanic), and Waterford (18.7% Hispanic).

Groton's Native American/Other Population

69 residents of Groton, or 0.7% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Groton is comparable to the share in Connecticut overall, where 1% of the population is Native American/Other. Groton ranks 17th statewide in terms of Native American/Other residents as a share of the population, out of 215 places.

Since the 2020 Census, Groton's Native American/Other population has declined by an estimated 58.9%. Native American/Other residents' share of Groton's population has decreased from 1.8% to 0.7%.

Groton is more Native American/Other than neighboring Long Hill CDP (Southeastern Connecticut County) (0% Native American/Other), Poquonock Bridge (0% Native American/Other), and Conning Towers-Nautilus Park (0.2% Native American/Other). Groton is less Native American/Other than neighboring New London (0.8% Native American/Other), and Waterford (1.9% Native American/Other).

Groton's Multiracial Population

560 residents of Groton, or 5.9% of the population, identify as Multiracial. The share of Multiracial residents in Groton is comparable to the share in Connecticut overall, where 4.3% of the population is Multiracial. Groton ranks 9th statewide in terms of Multiracial residents as a share of the population, out of 215 places.

Since the 2020 Census, Groton's Multiracial population has declined by an estimated 17.0%. Multiracial residents' share of Groton's population has decreased from 7.2% to 5.9%.

Groton is more Multiracial than neighboring New London (3.9% Multiracial), Poquonock Bridge (5.3% Multiracial), and Waterford (5.3% Multiracial). Groton is less Multiracial than neighboring Long Hill CDP (Southeastern Connecticut County) (6.7% Multiracial), and Conning Towers-Nautilus Park (10.5% 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.