Knox County Demographics

A map of Knox County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	38,223	37,533	93.2%	92.4%
Multiracial	1,546	1,595	3.8%	3.9%
Hispanic	768	672	1.9%	1.7%
Asian	202	250	0.5%	0.6%
Native American/Other	148	301	0.4%	0.7%
Black	116	256	0.3%	0.6%

Knox County, Maine has an estimated population of 41,003, a less than 1% change from the 40,607 recorded in the 2020 Census. The population is 93.2% White, 3.8% Multiracial, 1.9% Hispanic, 0.5% Asian, 0.4% Native American/Other, and 0.3% Black. This demographic dot map shows the population of Knox County, with one dot drawn for each person counted by the Census, color-coded by race.

Knox has become less racially diverse since the 2020 Census. It is considerably less 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 Knox County, that probability was 14.4% in 2020 and 12.9% in the most recent ACS estimates.

Knox County is ranked the 10th most populous county in Maine, out of 16 counties. Knox County was ranked the 10th most populous county in the 2020 Census.

Knox County's White Population

38,223 residents of Knox County, or 93.2% of the population, identify as White. The share of White residents in Knox County is slightly higher than in Maine overall, where 89.9% of the population is White. Knox County ranks 6th statewide in terms of White residents as a share of the population, out of 16 counties.

Since the 2020 Census, Knox County's White population has grown by an estimated 1.8%. White residents' share of Knox County's population has increased from 92.4% to 93.2%.

Knox County is more White than neighboring Waldo County (92.8% White), Lincoln County (93.1% White), Sagadahoc County (92% White), Hancock County (92.6% White), and Kennebec County (91.8% White).

Knox County's Black Population

116 residents of Knox County, or 0.3% of the population, identify as Black. The share of Black residents in Knox County is comparable to the share in Maine overall, where 1.8% of the population is Black. Knox County ranks 8th statewide in terms of Black residents as a share of the population, out of 16 counties.

Since the 2020 Census, Knox County's Black population has declined by an estimated 54.7%. Black residents' share of Knox County's population has remained roughly unchanged at 0.3%.

Knox County is less Black than neighboring Waldo County (0.4% Black), Lincoln County (0.8% Black), Sagadahoc County (0.5% Black), Hancock County (1% Black), and Kennebec County (0.9% Black).

Knox County's Asian Population

202 residents of Knox County, or 0.5% of the population, identify as Asian. The share of Asian residents in Knox County is comparable to the share in Maine overall, where 1.1% of the population is Asian. Knox County ranks 11th statewide in terms of Asian residents as a share of the population, out of 16 counties.

Since the 2020 Census, Knox County's Asian population has declined by an estimated 19.2%. Asian residents' share of Knox County's population has remained roughly unchanged at 0.5%.

Knox County is less Asian than neighboring Lincoln County (0.7% Asian), Sagadahoc County (0.7% Asian), Hancock County (1% Asian), and Kennebec County (0.9% Asian).

Knox County's Hispanic Population

768 residents of Knox County, or 1.9% of the population, identify as Hispanic. The share of Hispanic residents in Knox County is comparable to the share in Maine overall, where 2.2% of the population is Hispanic. Knox County ranks 9th statewide in terms of Hispanic residents as a share of the population, out of 16 counties.

Since the 2020 Census, Knox County's Hispanic population has grown by an estimated 14.3%. Hispanic residents' share of Knox County's population has remained roughly unchanged at 1.9%.

Knox County is more Hispanic than neighboring Waldo County (1.6% Hispanic), and Lincoln County (1.4% Hispanic). Knox County is less Hispanic than neighboring Sagadahoc County (2% Hispanic), and Kennebec County (2.3% Hispanic).

Knox County's Native American/Other Population

148 residents of Knox County, or 0.4% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Knox County is comparable to the share in Maine overall, where 0.7% of the population is Native American/Other. Knox County ranks 6th statewide in terms of Native American/Other residents as a share of the population, out of 16 counties.

Since the 2020 Census, Knox County's Native American/Other population has declined by an estimated 50.8%. Native American/Other residents' share of Knox County's population has remained roughly unchanged at 0.4%.

Knox County is less Native American/Other than neighboring Waldo County (0.7% Native American/Other), Hancock County (0.8% Native American/Other), and Kennebec County (0.5% Native American/Other).

Knox County's Multiracial Population

1,546 residents of Knox County, or 3.8% of the population, identify as Multiracial. The share of Multiracial residents in Knox County is comparable to the share in Maine overall, where 4.2% of the population is Multiracial. Knox County ranks 8th statewide in terms of Multiracial residents as a share of the population, out of 16 counties.

Since the 2020 Census, Knox County's Multiracial population has declined by an estimated 3.1%. Multiracial residents' share of Knox County's population has remained roughly unchanged at 3.8%.

Knox County is more Multiracial than neighboring Lincoln County (3.7% Multiracial), Hancock County (2.8% Multiracial), and Kennebec County (3.7% Multiracial). Knox County is less Multiracial than neighboring Waldo County (4% Multiracial), and Sagadahoc County (4.4% 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.