St. Marys, OH Demographics

A map of St. Marys's Population by Race

St. Marys, Ohio has an estimated population of 8,301, a slight decrease from the 8,397 recorded in the 2020 Census. The population is 90.9% White, 5.9% Hispanic, 1.7% Black, 1.4% Multiracial, 0.1% Asian, and 0.0% Native American/Other. This demographic dot map shows the population of St. Marys, with one dot drawn for each person counted by the Census, color-coded by race.

St. Marys has become more racially diverse since the 2020 Census. It is considerably less diverse than Ohio overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In St. Marys, that probability was 13.4% in 2020 and 17.1% in the most recent ACS estimates.

St. Marys is ranked the 216th most populous place in Ohio, out of 1,265 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. Marys was ranked the 211th most populous place in the 2020 Census.

St. Marys's White Population

7,542 residents of St. Marys, or 90.9% of the population, identify as White. The share of White residents in St. Marys is significantly higher than in Ohio overall, where 75.8% of the population is White. St. Marys ranks 423rd statewide in terms of White residents as a share of the population, out of 1,265 places.

Since the 2020 Census, St. Marys's White population has declined by an estimated 3.4%. White residents' share of St. Marys's population has decreased from 93.0% to 90.9%.

St. Marys is less White than neighboring New Knoxville (97.1% White), New Bremen (95.2% White), Chickasaw (91.9% White), Buckland (99.6% White), and Minster (98.9% White).

St. Marys's Black Population

142 residents of St. Marys, or 1.7% of the population, identify as Black. The share of Black residents in St. Marys is considerably lower than in Ohio overall, where 12% of the population is Black. St. Marys ranks 667th statewide in terms of Black residents as a share of the population, out of 1,265 places.

Since the 2020 Census, St. Marys's Black population has grown by an estimated 140.7%. Black residents' share of St. Marys's population has increased from 0.7% to 1.7%.

St. Marys is more Black than neighboring New Knoxville (0% Black), New Bremen (0.6% Black), Chickasaw (0% Black), Buckland (0% Black), and Minster (0.3% Black).

St. Marys's Asian Population

11 residents of St. Marys, or 0.1% of the population, identify as Asian. The share of Asian residents in St. Marys is slightly lower than in Ohio overall, where 2.5% of the population is Asian. St. Marys ranks 419th statewide in terms of Asian residents as a share of the population, out of 1,265 places.

Since the 2020 Census, St. Marys's Asian population has declined by an estimated 80.7%. Asian residents' share of St. Marys's population has decreased from 0.7% to 0.1%.

St. Marys is more Asian than neighboring New Knoxville (0% Asian), Chickasaw (0% Asian), Buckland (0% Asian), and Minster (0% Asian). St. Marys is less Asian than neighboring New Bremen (1.3% Asian).

St. Marys's Hispanic Population

490 residents of St. Marys, or 5.9% of the population, identify as Hispanic. The share of Hispanic residents in St. Marys is comparable to the share in Ohio overall, where 4.8% of the population is Hispanic. St. Marys ranks 668th statewide in terms of Hispanic residents as a share of the population, out of 1,265 places.

Since the 2020 Census, St. Marys's Hispanic population has grown by an estimated 208.2%. Hispanic residents' share of St. Marys's population has increased from 1.9% to 5.9%.

St. Marys is more Hispanic than neighboring New Knoxville (1.4% Hispanic), New Bremen (0.6% Hispanic), Chickasaw (2.3% Hispanic), Buckland (0% Hispanic), and Minster (0.6% Hispanic).

St. Marys's Native American/Other Population

0 residents of St. Marys, 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. Marys is comparable to the share in Ohio overall, where 0.5% of the population is Native American/Other. St. Marys ranks 448th statewide in terms of Native American/Other residents as a share of the population, out of 1,265 places.

Since the 2020 Census, St. Marys's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of St. Marys's population has decreased from 0.6% to 0.0%.

St. Marys is less Native American/Other than neighboring New Knoxville (0.5% Native American/Other), and Minster (0.2% Native American/Other).

St. Marys's Multiracial Population

116 residents of St. Marys, or 1.4% of the population, identify as Multiracial. The share of Multiracial residents in St. Marys is slightly lower than in Ohio overall, where 4.3% of the population is Multiracial. St. Marys ranks 884th statewide in terms of Multiracial residents as a share of the population, out of 1,265 places.

Since the 2020 Census, St. Marys's Multiracial population has declined by an estimated 56.6%. Multiracial residents' share of St. Marys's population has decreased from 3.2% to 1.4%.

St. Marys is more Multiracial than neighboring New Knoxville (1% Multiracial), Buckland (0.4% Multiracial), and Minster (0.1% Multiracial). St. Marys is less Multiracial than neighboring New Bremen (2.3% Multiracial), and Chickasaw (5.8% 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.