St. Mary, KY Demographics

A map of St. Mary's Population by Race

St. Mary, Kentucky has an estimated population of 147, an increase from the 138 recorded in the 2020 Census. The population is 87.1% White, 10.9% Multiracial, 2.0% Black, 0.0% Asian, 0.0% Hispanic, and 0.0% Native American/Other. This demographic dot map shows the population of St. Mary, with one dot drawn for each person counted by the Census, color-coded by race.

St. Mary has become considerably more racially diverse since the 2020 Census. It is considerably less diverse than Kentucky overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In St. Mary, that probability was 16.3% in 2020 and 22.9% in the most recent ACS estimates.

St. Mary is ranked the 495th most populous place in Kentucky, out of 554 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). St. Mary was ranked the 522nd most populous place in the 2020 Census.

St. Mary's White Population

128 residents of St. Mary, or 87.1% of the population, identify as White. The share of White residents in St. Mary is higher than in Kentucky overall, where 81.5% of the population is White. St. Mary ranks 254th statewide in terms of White residents as a share of the population, out of 554 places.

Since the 2020 Census, St. Mary's White population has grown by an estimated 1.6%. White residents' share of St. Mary's population has decreased from 91.3% to 87.1%.

St. Mary is more White than neighboring Lebanon (70.4% White), and Springfield (72.5% White). St. Mary is less White than neighboring Loretto (98.4% White), Raywick (100% White), and New Hope (100% White).

St. Mary's Black Population

3 residents of St. Mary, or 2.0% of the population, identify as Black. The share of Black residents in St. Mary is lower than in Kentucky overall, where 7.6% of the population is Black. St. Mary ranks 203rd statewide in terms of Black residents as a share of the population, out of 554 places.

Since the 2020 Census, St. Mary's Black population has declined by an estimated 25.0%. Black residents' share of St. Mary's population has decreased from 2.9% to 2.0%.

St. Mary is more Black than neighboring Loretto (0% Black), Raywick (0% Black), and New Hope (0% Black). St. Mary is less Black than neighboring Lebanon (17.9% Black), and Springfield (18.3% Black).

St. Mary's Asian Population

0 residents of St. Mary, or 0.0% of the population, identify as Asian. The share of Asian residents in St. Mary is comparable to the share in Kentucky overall, where 1.6% of the population is Asian. St. Mary ranks 388th statewide in terms of Asian residents as a share of the population, out of 554 places.

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

St. Mary is less Asian than neighboring Lebanon (0.6% Asian), and Springfield (1.3% Asian).

St. Mary's Hispanic Population

0 residents of St. Mary, or 0.0% of the population, identify as Hispanic. The share of Hispanic residents in St. Mary is slightly lower than in Kentucky overall, where 5% of the population is Hispanic. St. Mary ranks 386th statewide in terms of Hispanic residents as a share of the population, out of 554 places.

Since the 2020 Census, St. Mary's Hispanic population has declined by an estimated 100.0%. Hispanic residents' share of St. Mary's population has decreased from 1.4% to 0.0%.

St. Mary is less Hispanic than neighboring Loretto (1.2% Hispanic), and Lebanon (9.7% Hispanic).

St. Mary's Native American/Other Population

0 residents of St. Mary, 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 St. Mary is comparable to the share in Kentucky overall, where 0.4% of the population is Native American/Other. St. Mary ranks 426th statewide in terms of Native American/Other residents as a share of the population, out of 554 places.

Since the 2020 Census, St. Mary's Native American/Other population has grown from 0 to an estimated 0. Native American/Other residents' share of St. Mary's population has remained roughly unchanged at 0.0%.

St. Mary's Multiracial Population

16 residents of St. Mary, or 10.9% of the population, identify as Multiracial. The share of Multiracial residents in St. Mary is higher than in Kentucky overall, where 3.9% of the population is Multiracial. St. Mary ranks 202nd statewide in terms of Multiracial residents as a share of the population, out of 554 places.

Since the 2020 Census, St. Mary's Multiracial population has grown by an estimated 166.7%. Multiracial residents' share of St. Mary's population has increased from 4.3% to 10.9%.

St. Mary is more Multiracial than neighboring Loretto (0.4% Multiracial), Raywick (0% Multiracial), Lebanon (1.4% Multiracial), New Hope (0% Multiracial), and Springfield (7.9% 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.