St. John, IN Demographics

A map of St. John's Population by Race

St. John, Indiana has an estimated population of 22,567, a large increase from the 20,303 recorded in the 2020 Census. The population is 78.7% White, 13.6% Hispanic, 2.3% Black, 2.2% Native American/Other, 2.0% Asian, and 1.2% Multiracial. This demographic dot map shows the population of St. John, with one dot drawn for each person counted by the Census, color-coded by race.

St. John has become more racially diverse since the 2020 Census. It is considerably less diverse than Indiana overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In St. John, that probability was 33.7% in 2020 and 36.0% in the most recent ACS estimates.

St. John is ranked the 45th most populous place in Indiana, out of 976 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. John was ranked the 48th most populous place in the 2020 Census.

St. John's White Population

17,766 residents of St. John, or 78.7% of the population, identify as White. The share of White residents in St. John is slightly higher than in Indiana overall, where 75.4% of the population is White. St. John ranks 607th statewide in terms of White residents as a share of the population, out of 976 places.

Since the 2020 Census, St. John's White population has grown by an estimated 8.6%. White residents' share of St. John's population has decreased from 80.6% to 78.7%.

St. John is more White than neighboring Schererville (70% White), Willowbrook (12.7% White), Dyer (78.6% White), and Plum Valley (37.5% White). St. John is less White than neighboring Cedar Lake (85.6% White).

St. John's Black Population

520 residents of St. John, or 2.3% of the population, identify as Black. The share of Black residents in St. John is lower than in Indiana overall, where 9.1% of the population is Black. St. John ranks 88th statewide in terms of Black residents as a share of the population, out of 976 places.

Since the 2020 Census, St. John's Black population has declined by an estimated 18.0%. Black residents' share of St. John's population has decreased from 3.1% to 2.3%.

St. John is more Black than neighboring Cedar Lake (0.2% Black). St. John is less Black than neighboring Schererville (7.7% Black), Willowbrook (76% Black), Dyer (2.4% Black), and Plum Valley (51.3% Black).

St. John's Asian Population

459 residents of St. John, or 2.0% of the population, identify as Asian. The share of Asian residents in St. John is comparable to the share in Indiana overall, where 2.6% of the population is Asian. St. John ranks 60th statewide in terms of Asian residents as a share of the population, out of 976 places.

Since the 2020 Census, St. John's Asian population has grown by an estimated 29.7%. Asian residents' share of St. John's population has remained roughly unchanged at 2.0%.

St. John is more Asian than neighboring Willowbrook (0.4% Asian), Plum Valley (0% Asian), and Cedar Lake (1% Asian). St. John is less Asian than neighboring Schererville (2.1% Asian), and Dyer (3.1% Asian).

St. John's Hispanic Population

3,071 residents of St. John, or 13.6% of the population, identify as Hispanic. The share of Hispanic residents in St. John is slightly higher than in Indiana overall, where 8.6% of the population is Hispanic. St. John ranks 58th statewide in terms of Hispanic residents as a share of the population, out of 976 places.

Since the 2020 Census, St. John's Hispanic population has grown by an estimated 38.1%. Hispanic residents' share of St. John's population has increased from 10.9% to 13.6%.

St. John is more Hispanic than neighboring Willowbrook (6.6% Hispanic), Dyer (12.7% Hispanic), Plum Valley (0% Hispanic), and Cedar Lake (8.5% Hispanic). St. John is less Hispanic than neighboring Schererville (16.2% Hispanic).

St. John's Native American/Other Population

489 residents of St. John, or 2.2% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in St. John is comparable to the share in Indiana overall, where 0.5% of the population is Native American/Other. St. John ranks 264th statewide in terms of Native American/Other residents as a share of the population, out of 976 places.

Since the 2020 Census, St. John's Native American/Other population has grown by an estimated 357.0%. Native American/Other residents' share of St. John's population has increased from 0.5% to 2.2%.

St. John is more Native American/Other than neighboring Schererville (0.3% Native American/Other), Willowbrook (0% Native American/Other), Dyer (0.2% Native American/Other), and Cedar Lake (0% Native American/Other). St. John is less Native American/Other than neighboring Plum Valley (5.4% Native American/Other).

St. John's Multiracial Population

262 residents of St. John, or 1.2% of the population, identify as Multiracial. The share of Multiracial residents in St. John is slightly lower than in Indiana overall, where 3.8% of the population is Multiracial. St. John ranks 423rd statewide in terms of Multiracial residents as a share of the population, out of 976 places.

Since the 2020 Census, St. John's Multiracial population has declined by an estimated 58.1%. Multiracial residents' share of St. John's population has decreased from 3.1% to 1.2%.

St. John is less Multiracial than neighboring Schererville (3.7% Multiracial), Willowbrook (4.3% Multiracial), Dyer (3% Multiracial), Plum Valley (5.8% Multiracial), and Cedar Lake (4.7% 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.