Monroe, IA Demographics

A map of Monroe's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	2,033	1,880	95.9%	95.6%
Asian	32	6	1.5%	0.3%
Hispanic	28	24	1.3%	1.2%
Multiracial	18	45	0.8%	2.3%
Native American/Other	7	10	0.3%	0.5%
Black	2	2	0.1%	0.1%

Monroe, Iowa has an estimated population of 2,120, an increase from the 1,967 recorded in the 2020 Census. The population is 95.9% White, 1.5% Asian, 1.3% Hispanic, 0.8% Multiracial, 0.3% Native American/Other, and 0.1% Black. This demographic dot map shows the population of Monroe, with one dot drawn for each person counted by the Census, color-coded by race.

Monroe has become slightly less racially diverse since the 2020 Census. It is considerably less diverse than Iowa overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Monroe, that probability was 8.6% in 2020 and 8.0% in the most recent ACS estimates.

Monroe is ranked the 160th most populous place in Iowa, out of 1,026 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). Monroe was ranked the 173rd most populous place in the 2020 Census.

Monroe's White Population

2,033 residents of Monroe, or 95.9% of the population, identify as White. The share of White residents in Monroe is considerably higher than in Iowa overall, where 82.3% of the population is White. Monroe ranks 231st statewide in terms of White residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Monroe's White population has grown by an estimated 8.1%. White residents' share of Monroe's population has remained roughly unchanged at 95.9%.

Monroe is more White than neighboring Newton (86.1% White), and Knoxville (93% White). Monroe is less White than neighboring Reasnor (97.4% White), Prairie City (96.4% White), and Lambs Grove (98.9% White).

Monroe's Black Population

2 residents of Monroe, or 0.1% of the population, identify as Black. The share of Black residents in Monroe is slightly lower than in Iowa overall, where 3.8% of the population is Black. Monroe ranks 588th statewide in terms of Black residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Monroe's Black population has remained roughly the same. Black residents' share of Monroe's population has remained roughly unchanged at 0.1%.

Monroe is more Black than neighboring Reasnor (0% Black), and Lambs Grove (0% Black). Monroe is less Black than neighboring Prairie City (0.6% Black), Newton (1.5% Black), and Knoxville (0.3% Black).

Monroe's Asian Population

32 residents of Monroe, or 1.5% of the population, identify as Asian. The share of Asian residents in Monroe is comparable to the share in Iowa overall, where 2.5% of the population is Asian. Monroe ranks 401st statewide in terms of Asian residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Monroe's Asian population has grown by an estimated 433.3%. Asian residents' share of Monroe's population has increased from 0.3% to 1.5%.

Monroe is more Asian than neighboring Reasnor (0% Asian), Prairie City (0.1% Asian), Lambs Grove (0% Asian), and Newton (0.1% Asian).

Monroe's Hispanic Population

28 residents of Monroe, or 1.3% of the population, identify as Hispanic. The share of Hispanic residents in Monroe is lower than in Iowa overall, where 7.3% of the population is Hispanic. Monroe ranks 793rd statewide in terms of Hispanic residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Monroe's Hispanic population has grown by an estimated 16.7%. Hispanic residents' share of Monroe's population has remained roughly unchanged at 1.3%.

Monroe is more Hispanic than neighboring Prairie City (1.1% Hispanic), and Lambs Grove (1.1% Hispanic). Monroe is less Hispanic than neighboring Newton (5.7% Hispanic), and Knoxville (1.9% Hispanic).

Monroe's Native American/Other Population

7 residents of Monroe, or 0.3% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Monroe is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Monroe ranks 337th statewide in terms of Native American/Other residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Monroe's Native American/Other population has declined by an estimated 30.0%. Native American/Other residents' share of Monroe's population has remained roughly unchanged at 0.3%.

Monroe is more Native American/Other than neighboring Reasnor (0% Native American/Other), Prairie City (0% Native American/Other), and Lambs Grove (0% Native American/Other). Monroe is less Native American/Other than neighboring Newton (0.5% Native American/Other).

Monroe's Multiracial Population

18 residents of Monroe, or 0.8% of the population, identify as Multiracial. The share of Multiracial residents in Monroe is slightly lower than in Iowa overall, where 3.5% of the population is Multiracial. Monroe ranks 627th statewide in terms of Multiracial residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Monroe's Multiracial population has declined by an estimated 60.0%. Multiracial residents' share of Monroe's population has decreased from 2.3% to 0.8%.

Monroe is more Multiracial than neighboring Lambs Grove (0% Multiracial). Monroe is less Multiracial than neighboring Reasnor (1.3% Multiracial), Prairie City (1.8% Multiracial), Newton (6.2% Multiracial), and Knoxville (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.