St. Peters, MO Demographics

A map of St. Peters's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	50,236	47,581	85.0%	82.4%
Black	2,742	3,219	4.6%	5.6%
Multiracial	2,741	2,931	4.6%	5.1%
Hispanic	1,713	2,189	2.9%	3.8%
Asian	1,513	1,470	2.6%	2.5%
Native American/Other	147	342	0.2%	0.6%

St. Peters, Missouri has an estimated population of 59,092, a slight increase from the 57,732 recorded in the 2020 Census. The population is 85.0% White, 4.6% Black, 4.6% Multiracial, 2.9% Hispanic, 2.6% Asian, and 0.2% Native American/Other. This demographic dot map shows the population of St. Peters, with one dot drawn for each person counted by the Census, color-coded by race.

St. Peters has become less racially diverse since the 2020 Census. It is considerably less diverse than Missouri overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In St. Peters, that probability was 31.3% in 2020 and 27.2% in the most recent ACS estimates.

St. Peters is ranked the 11th most populous place in Missouri, out of 1,082 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. Peters was ranked the 11th most populous place in the 2020 Census.

St. Peters's White Population

50,236 residents of St. Peters, or 85.0% of the population, identify as White. The share of White residents in St. Peters is higher than in Missouri overall, where 76.3% of the population is White. St. Peters ranks 851st statewide in terms of White residents as a share of the population, out of 1,082 places.

Since the 2020 Census, St. Peters's White population has grown by an estimated 5.6%. White residents' share of St. Peters's population has increased from 82.4% to 85.0%.

St. Peters is more White than neighboring Cottleville (80.6% White), St. Charles (77.7% White), and O'Fallon (79.5% White). St. Peters is less White than neighboring Weldon Spring (93.9% White), and Weldon Spring Heights (90.1% White).

St. Peters's Black Population

2,742 residents of St. Peters, or 4.6% of the population, identify as Black. The share of Black residents in St. Peters is lower than in Missouri overall, where 10.9% of the population is Black. St. Peters ranks 151st statewide in terms of Black residents as a share of the population, out of 1,082 places.

Since the 2020 Census, St. Peters's Black population has declined by an estimated 14.8%. Black residents' share of St. Peters's population has decreased from 5.6% to 4.6%.

St. Peters is more Black than neighboring Weldon Spring (0.8% Black), and Weldon Spring Heights (0% Black). St. Peters is less Black than neighboring Cottleville (7.1% Black), St. Charles (7.2% Black), and O'Fallon (5.2% Black).

St. Peters's Asian Population

1,513 residents of St. Peters, or 2.6% of the population, identify as Asian. The share of Asian residents in St. Peters is comparable to the share in Missouri overall, where 2.1% of the population is Asian. St. Peters ranks 80th statewide in terms of Asian residents as a share of the population, out of 1,082 places.

Since the 2020 Census, St. Peters's Asian population has grown by an estimated 2.9%. Asian residents' share of St. Peters's population has remained roughly unchanged at 2.6%.

St. Peters is more Asian than neighboring Cottleville (1.3% Asian), and Weldon Spring Heights (1.7% Asian). St. Peters is less Asian than neighboring Weldon Spring (3.8% Asian), St. Charles (3.8% Asian), and O'Fallon (4.8% Asian).

St. Peters's Hispanic Population

1,713 residents of St. Peters, or 2.9% of the population, identify as Hispanic. The share of Hispanic residents in St. Peters is slightly lower than in Missouri overall, where 5.2% of the population is Hispanic. St. Peters ranks 266th statewide in terms of Hispanic residents as a share of the population, out of 1,082 places.

Since the 2020 Census, St. Peters's Hispanic population has declined by an estimated 21.7%. Hispanic residents' share of St. Peters's population has decreased from 3.8% to 2.9%.

St. Peters is more Hispanic than neighboring Weldon Spring (0% Hispanic), and Weldon Spring Heights (0% Hispanic). St. Peters is less Hispanic than neighboring Cottleville (3.5% Hispanic), St. Charles (6.5% Hispanic), and O'Fallon (5.5% Hispanic).

St. Peters's Native American/Other Population

147 residents of St. Peters, or 0.2% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in St. Peters is comparable to the share in Missouri overall, where 0.7% of the population is Native American/Other. St. Peters ranks 548th statewide in terms of Native American/Other residents as a share of the population, out of 1,082 places.

Since the 2020 Census, St. Peters's Native American/Other population has declined by an estimated 57.0%. Native American/Other residents' share of St. Peters's population has remained roughly unchanged at 0.2%.

St. Peters is more Native American/Other than neighboring Weldon Spring Heights (0% Native American/Other). St. Peters is less Native American/Other than neighboring Cottleville (1.2% Native American/Other), Weldon Spring (0.5% Native American/Other), St. Charles (0.5% Native American/Other), and O'Fallon (0.6% Native American/Other).

St. Peters's Multiracial Population

2,741 residents of St. Peters, or 4.6% of the population, identify as Multiracial. The share of Multiracial residents in St. Peters is comparable to the share in Missouri overall, where 4.8% of the population is Multiracial. St. Peters ranks 463rd statewide in terms of Multiracial residents as a share of the population, out of 1,082 places.

Since the 2020 Census, St. Peters's Multiracial population has declined by an estimated 6.5%. Multiracial residents' share of St. Peters's population has decreased from 5.1% to 4.6%.

St. Peters is more Multiracial than neighboring Weldon Spring (1% Multiracial), St. Charles (4.3% Multiracial), and O'Fallon (4.3% Multiracial). St. Peters is less Multiracial than neighboring Cottleville (6.3% Multiracial), and Weldon Spring Heights (8.3% 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.