Castine, ME Demographics

A map of Castine's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	851	924	85.4%	91.1%
Hispanic	55	30	5.5%	3.0%
Multiracial	50	19	5.0%	1.9%
Black	40	16	4.0%	1.6%
Asian	0	18	0.0%	1.8%
Native American/Other	0	7	0.0%	0.7%

Castine, Maine has an estimated population of 996, a slight decrease from the 1,014 recorded in the 2020 Census. The population is 85.4% White, 5.5% Hispanic, 5.0% Multiracial, 4.0% Black, 0.0% Asian, and 0.0% Native American/Other. This demographic dot map shows the population of Castine, with one dot drawn for each person counted by the Census, color-coded by race.

Castine has become considerably more racially diverse since the 2020 Census. It is considerably more diverse than Maine overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Castine, that probability was 16.8% in 2020 and 26.3% in the most recent ACS estimates.

Castine is ranked the 105th most populous place in Maine, out of 155 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). Castine was ranked the 101st most populous place in the 2020 Census.

Castine's White Population

851 residents of Castine, or 85.4% of the population, identify as White. The share of White residents in Castine is slightly lower than in Maine overall, where 89.9% of the population is White. Castine ranks 100th statewide in terms of White residents as a share of the population, out of 155 places.

Since the 2020 Census, Castine's White population has declined by an estimated 7.9%. White residents' share of Castine's population has decreased from 91.1% to 85.4%.

Castine is less White than neighboring Searsport (97% White), Bucksport (98.5% White), Blue Hill (96.2% White), Belfast (89.8% White), and Winterport (94.7% White).

Castine's Black Population

40 residents of Castine, or 4.0% of the population, identify as Black. The share of Black residents in Castine is slightly higher than in Maine overall, where 1.8% of the population is Black. Castine ranks 23rd statewide in terms of Black residents as a share of the population, out of 155 places.

Since the 2020 Census, Castine's Black population has grown by an estimated 150.0%. Black residents' share of Castine's population has increased from 1.6% to 4.0%.

Castine is more Black than neighboring Searsport (1.1% Black), Bucksport (0% Black), Blue Hill (0.1% Black), Belfast (0% Black), and Winterport (0% Black).

Castine's Asian Population

0 residents of Castine, or 0.0% of the population, identify as Asian. The share of Asian residents in Castine is comparable to the share in Maine overall, where 1.1% of the population is Asian. Castine ranks 27th statewide in terms of Asian residents as a share of the population, out of 155 places.

Since the 2020 Census, Castine's Asian population has declined by an estimated 100.0%. Asian residents' share of Castine's population has decreased from 1.8% to 0.0%.

Castine is less Asian than neighboring Belfast (0.5% Asian).

Castine's Hispanic Population

55 residents of Castine, or 5.5% of the population, identify as Hispanic. The share of Hispanic residents in Castine is slightly higher than in Maine overall, where 2.2% of the population is Hispanic. Castine ranks 14th statewide in terms of Hispanic residents as a share of the population, out of 155 places.

Since the 2020 Census, Castine's Hispanic population has grown by an estimated 83.3%. Hispanic residents' share of Castine's population has increased from 3.0% to 5.5%.

Castine is more Hispanic than neighboring Searsport (0.7% Hispanic), Bucksport (1.5% Hispanic), Blue Hill (3.6% Hispanic), Belfast (2% Hispanic), and Winterport (0.6% Hispanic).

Castine's Native American/Other Population

0 residents of Castine, 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 Castine is comparable to the share in Maine overall, where 0.7% of the population is Native American/Other. Castine ranks 85th statewide in terms of Native American/Other residents as a share of the population, out of 155 places.

Since the 2020 Census, Castine's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of Castine's population has decreased from 0.7% to 0.0%.

Castine's Multiracial Population

50 residents of Castine, or 5.0% of the population, identify as Multiracial. The share of Multiracial residents in Castine is comparable to the share in Maine overall, where 4.2% of the population is Multiracial. Castine ranks 146th statewide in terms of Multiracial residents as a share of the population, out of 155 places.

Since the 2020 Census, Castine's Multiracial population has grown by an estimated 163.2%. Multiracial residents' share of Castine's population has increased from 1.9% to 5.0%.

Castine is more Multiracial than neighboring Searsport (1.3% Multiracial), Bucksport (0% Multiracial), Blue Hill (0% Multiracial), and Winterport (4.7% Multiracial). Castine is less Multiracial than neighboring Belfast (7.8% 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.