Spencer, IA Demographics

A map of Spencer's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	10,305	10,222	90.4%	90.3%
Hispanic	644	566	5.6%	5.0%
Multiracial	288	316	2.5%	2.8%
Asian	103	96	0.9%	0.8%
Black	40	85	0.4%	0.8%
Native American/Other	20	40	0.2%	0.4%

Spencer, Iowa has an estimated population of 11,400, a less than 1% change from the 11,325 recorded in the 2020 Census. The population is 90.4% White, 5.6% Hispanic, 2.5% Multiracial, 0.9% Asian, 0.4% Black, and 0.2% Native American/Other. This demographic dot map shows the population of Spencer, with one dot drawn for each person counted by the Census, color-coded by race.

Spencer is about as racially diverse as it was in 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 Spencer, that probability was 18.2% in 2020 and 17.9% in the most recent ACS estimates.

Spencer is ranked the 36th 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). Spencer was ranked the 35th most populous place in the 2020 Census.

Spencer's White Population

10,305 residents of Spencer, or 90.4% of the population, identify as White. The share of White residents in Spencer is higher than in Iowa overall, where 82.3% of the population is White. Spencer ranks 728th statewide in terms of White residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Spencer's White population has remained roughly the same. White residents' share of Spencer's population has remained roughly unchanged at 90.4%.

Spencer is more White than neighboring Greenville (90.3% White), and Royal (76.1% White). Spencer is less White than neighboring Fostoria (90.6% White), Dickens (96.2% White), and Rossie (93.2% White).

Spencer's Black Population

40 residents of Spencer, or 0.4% of the population, identify as Black. The share of Black residents in Spencer is slightly lower than in Iowa overall, where 3.8% of the population is Black. Spencer ranks 273rd statewide in terms of Black residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Spencer's Black population has declined by an estimated 52.9%. Black residents' share of Spencer's population has remained roughly unchanged at 0.4%.

Spencer is more Black than neighboring Greenville (0% Black), Dickens (0% Black), Rossie (0% Black), and Royal (0% Black). Spencer is less Black than neighboring Fostoria (2.8% Black).

Spencer's Asian Population

103 residents of Spencer, or 0.9% of the population, identify as Asian. The share of Asian residents in Spencer is comparable to the share in Iowa overall, where 2.5% of the population is Asian. Spencer ranks 168th statewide in terms of Asian residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Spencer's Asian population has grown by an estimated 7.3%. Asian residents' share of Spencer's population has remained roughly unchanged at 0.9%.

Spencer is more Asian than neighboring Fostoria (0% Asian), Greenville (0% Asian), Dickens (0% Asian), Rossie (0% Asian), and Royal (0% Asian).

Spencer's Hispanic Population

644 residents of Spencer, or 5.6% of the population, identify as Hispanic. The share of Hispanic residents in Spencer is comparable to the share in Iowa overall, where 7.3% of the population is Hispanic. Spencer ranks 229th statewide in terms of Hispanic residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Spencer's Hispanic population has grown by an estimated 13.8%. Hispanic residents' share of Spencer's population has increased from 5.0% to 5.6%.

Spencer is more Hispanic than neighboring Fostoria (1.7% Hispanic), Greenville (3.2% Hispanic), and Dickens (3.8% Hispanic). Spencer is less Hispanic than neighboring Rossie (5.7% Hispanic), and Royal (11.6% Hispanic).

Spencer's Native American/Other Population

20 residents of Spencer, 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 Spencer is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Spencer ranks 450th statewide in terms of Native American/Other residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Spencer's Native American/Other population has declined by an estimated 50.0%. Native American/Other residents' share of Spencer's population has remained roughly unchanged at 0.2%.

Spencer is more Native American/Other than neighboring Fostoria (0% Native American/Other), Greenville (0% Native American/Other), Dickens (0% Native American/Other), Rossie (0% Native American/Other), and Royal (0% Native American/Other).

Spencer's Multiracial Population

288 residents of Spencer, or 2.5% of the population, identify as Multiracial. The share of Multiracial residents in Spencer is comparable to the share in Iowa overall, where 3.5% of the population is Multiracial. Spencer ranks 475th statewide in terms of Multiracial residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Spencer's Multiracial population has declined by an estimated 8.9%. Multiracial residents' share of Spencer's population has remained roughly unchanged at 2.5%.

Spencer is more Multiracial than neighboring Dickens (0% Multiracial), and Rossie (1.1% Multiracial). Spencer is less Multiracial than neighboring Fostoria (5% Multiracial), Greenville (6.5% Multiracial), and Royal (12.3% 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.