Diagonal, IA Demographics

A map of Diagonal's Population by Race

Diagonal, Iowa has an estimated population of 454, a dramatic increase from the 344 recorded in the 2020 Census. The population is 83.7% White, 12.6% Multiracial, 3.7% Hispanic, 0.0% Black, 0.0% Asian, and 0.0% Native American/Other. This demographic dot map shows the population of Diagonal, with one dot drawn for each person counted by the Census, color-coded by race.

Diagonal has become considerably more racially diverse since the 2020 Census. It is 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 Diagonal, that probability was 13.2% in 2020 and 28.2% in the most recent ACS estimates.

Diagonal is ranked the 490th 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). Diagonal was ranked the 550th most populous place in the 2020 Census.

Diagonal's White Population

380 residents of Diagonal, or 83.7% of the population, identify as White. The share of White residents in Diagonal is comparable to the share in Iowa overall, where 82.3% of the population is White. Diagonal ranks 514th statewide in terms of White residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Diagonal's White population has grown by an estimated 18.8%. White residents' share of Diagonal's population has decreased from 93.0% to 83.7%.

Diagonal is more White than neighboring Shannon City (75.7% White). Diagonal is less White than neighboring Benton (100% White), Clearfield (93.7% White), Mount Ayr (95.6% White), and Delphos (100% White).

Diagonal's Black Population

0 residents of Diagonal, or 0.0% of the population, identify as Black. The share of Black residents in Diagonal is slightly lower than in Iowa overall, where 3.8% of the population is Black. Diagonal ranks 600th statewide in terms of Black residents as a share of the population, out of 1,026 places.

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

Diagonal is less Black than neighboring Mount Ayr (1% Black).

Diagonal's Asian Population

0 residents of Diagonal, or 0.0% of the population, identify as Asian. The share of Asian residents in Diagonal is slightly lower than in Iowa overall, where 2.5% of the population is Asian. Diagonal ranks 416th statewide in terms of Asian residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Diagonal's Asian population has declined by an estimated 100.0%. Asian residents' share of Diagonal's population has remained roughly unchanged at 0.0%.

Diagonal's Hispanic Population

17 residents of Diagonal, or 3.7% of the population, identify as Hispanic. The share of Hispanic residents in Diagonal is slightly lower than in Iowa overall, where 7.3% of the population is Hispanic. Diagonal ranks 860th statewide in terms of Hispanic residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Diagonal's Hispanic population has grown by an estimated 466.7%. Hispanic residents' share of Diagonal's population has increased from 0.9% to 3.7%.

Diagonal is more Hispanic than neighboring Benton (0% Hispanic), Mount Ayr (2% Hispanic), and Delphos (0% Hispanic). Diagonal is less Hispanic than neighboring Shannon City (24.3% Hispanic), and Clearfield (3.8% Hispanic).

Diagonal's Native American/Other Population

0 residents of Diagonal, 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 Diagonal is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Diagonal ranks 117th statewide in terms of Native American/Other residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Diagonal's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of Diagonal's population has decreased from 1.2% to 0.0%.

Diagonal is less Native American/Other than neighboring Mount Ayr (0.9% Native American/Other).

Diagonal's Multiracial Population

57 residents of Diagonal, or 12.6% of the population, identify as Multiracial. The share of Multiracial residents in Diagonal is higher than in Iowa overall, where 3.5% of the population is Multiracial. Diagonal ranks 147th statewide in terms of Multiracial residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Diagonal's Multiracial population has grown by an estimated 256.3%. Multiracial residents' share of Diagonal's population has increased from 4.7% to 12.6%.

Diagonal is more Multiracial than neighboring Benton (0% Multiracial), Shannon City (0% Multiracial), Clearfield (2.5% Multiracial), Mount Ayr (0.5% Multiracial), and Delphos (0% 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.