Mason City, IA Demographics

A map of Mason City's Population by Race

Mason City, Iowa has an estimated population of 27,050, a slight decrease from the 27,338 recorded in the 2020 Census. The population is 84.9% White, 7.0% Hispanic, 2.9% Black, 2.6% Multiracial, 1.3% Asian, and 1.3% Native American/Other. This demographic dot map shows the population of Mason City, with one dot drawn for each person counted by the Census, color-coded by race.

Mason City is about as racially diverse as it was in 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 Mason City, that probability was 27.6% in 2020 and 27.2% in the most recent ACS estimates.

Mason City is ranked the 18th 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). Mason City was ranked the 17th most populous place in the 2020 Census.

Mason City's White Population

22,976 residents of Mason City, or 84.9% of the population, identify as White. The share of White residents in Mason City is slightly higher than in Iowa overall, where 82.3% of the population is White. Mason City ranks 906th statewide in terms of White residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Mason City's White population has remained roughly the same. White residents' share of Mason City's population has remained roughly unchanged at 84.9%.

Mason City is more White than neighboring Manly (83% White). Mason City is less White than neighboring Portland (100% White), Burchinal (100% White), Plymouth (97.1% White), and Rock Falls (100% White).

Mason City's Black Population

772 residents of Mason City, or 2.9% of the population, identify as Black. The share of Black residents in Mason City is comparable to the share in Iowa overall, where 3.8% of the population is Black. Mason City ranks 75th statewide in terms of Black residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Mason City's Black population has grown by an estimated 5.8%. Black residents' share of Mason City's population has remained roughly unchanged at 2.9%.

Mason City is more Black than neighboring Portland (0% Black), Burchinal (0% Black), Plymouth (0.7% Black), and Rock Falls (0% Black).

Mason City's Asian Population

359 residents of Mason City, or 1.3% of the population, identify as Asian. The share of Asian residents in Mason City is comparable to the share in Iowa overall, where 2.5% of the population is Asian. Mason City ranks 87th statewide in terms of Asian residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Mason City's Asian population has declined by an estimated 11.6%. Asian residents' share of Mason City's population has remained roughly unchanged at 1.3%.

Mason City is more Asian than neighboring Portland (0% Asian), Burchinal (0% Asian), Plymouth (0.2% Asian), Rock Falls (0% Asian), and Manly (0% Asian).

Mason City's Hispanic Population

1,897 residents of Mason City, or 7.0% of the population, identify as Hispanic. The share of Hispanic residents in Mason City is comparable to the share in Iowa overall, where 7.3% of the population is Hispanic. Mason City ranks 147th statewide in terms of Hispanic residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Mason City's Hispanic population has grown by an estimated 4.2%. Hispanic residents' share of Mason City's population has remained roughly unchanged at 7.0%.

Mason City is more Hispanic than neighboring Portland (0% Hispanic), Burchinal (0% Hispanic), Plymouth (0.7% Hispanic), and Rock Falls (0% Hispanic). Mason City is less Hispanic than neighboring Manly (8.3% Hispanic).

Mason City's Native American/Other Population

351 residents of Mason City, or 1.3% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Mason City is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Mason City ranks 145th statewide in terms of Native American/Other residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Mason City's Native American/Other population has grown by an estimated 30.0%. Native American/Other residents' share of Mason City's population has remained roughly unchanged at 1.3%.

Mason City is more Native American/Other than neighboring Portland (0% Native American/Other), Burchinal (0% Native American/Other), Plymouth (0% Native American/Other), Rock Falls (0% Native American/Other), and Manly (0% Native American/Other).

Mason City's Multiracial Population

695 residents of Mason City, or 2.6% of the population, identify as Multiracial. The share of Multiracial residents in Mason City is comparable to the share in Iowa overall, where 3.5% of the population is Multiracial. Mason City ranks 280th statewide in terms of Multiracial residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Mason City's Multiracial population has declined by an estimated 28.0%. Multiracial residents' share of Mason City's population has decreased from 3.5% to 2.6%.

Mason City is more Multiracial than neighboring Portland (0% Multiracial), Burchinal (0% Multiracial), Plymouth (1.2% Multiracial), and Rock Falls (0% Multiracial). Mason City is less Multiracial than neighboring Manly (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.