Jefferson, IA Demographics

A map of Jefferson's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	3,893	3,853	93.8%	92.1%
Hispanic	147	155	3.5%	3.7%
Multiracial	102	119	2.5%	2.8%
Black	10	14	0.2%	0.3%
Asian	0	29	0.0%	0.7%
Native American/Other	0	12	0.0%	0.3%

Jefferson, Iowa has an estimated population of 4,152, a less than 1% change from the 4,182 recorded in the 2020 Census. The population is 93.8% White, 3.5% Hispanic, 2.5% Multiracial, 0.2% Black, 0.0% Asian, and 0.0% Native American/Other. This demographic dot map shows the population of Jefferson, with one dot drawn for each person counted by the Census, color-coded by race.

Jefferson has become 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 Jefferson, that probability was 14.9% in 2020 and 11.9% in the most recent ACS estimates.

Jefferson is ranked the 101st 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). Jefferson was ranked the 100th most populous place in the 2020 Census.

Jefferson's White Population

3,893 residents of Jefferson, or 93.8% of the population, identify as White. The share of White residents in Jefferson is considerably higher than in Iowa overall, where 82.3% of the population is White. Jefferson ranks 595th statewide in terms of White residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Jefferson's White population has grown by an estimated 1.0%. White residents' share of Jefferson's population has increased from 92.1% to 93.8%.

Jefferson is more White than neighboring Grand Junction (87.4% White), Dana (92.9% White), Churdan (86.7% White), and Scranton (85.1% White). Jefferson is less White than neighboring Bagley (95.1% White).

Jefferson's Black Population

10 residents of Jefferson, or 0.2% of the population, identify as Black. The share of Black residents in Jefferson is slightly lower than in Iowa overall, where 3.8% of the population is Black. Jefferson ranks 478th statewide in terms of Black residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Jefferson's Black population has declined by an estimated 28.6%. Black residents' share of Jefferson's population has remained roughly unchanged at 0.2%.

Jefferson is more Black than neighboring Grand Junction (0% Black), Dana (0% Black), Churdan (0% Black), and Scranton (0% Black). Jefferson is less Black than neighboring Bagley (2.7% Black).

Jefferson's Asian Population

0 residents of Jefferson, or 0.0% of the population, identify as Asian. The share of Asian residents in Jefferson is slightly lower than in Iowa overall, where 2.5% of the population is Asian. Jefferson ranks 209th statewide in terms of Asian residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Jefferson's Asian population has declined by an estimated 100.0%. Asian residents' share of Jefferson's population has decreased from 0.7% to 0.0%.

Jefferson is less Asian than neighboring Churdan (3.5% Asian).

Jefferson's Hispanic Population

147 residents of Jefferson, or 3.5% of the population, identify as Hispanic. The share of Hispanic residents in Jefferson is slightly lower than in Iowa overall, where 7.3% of the population is Hispanic. Jefferson ranks 322nd statewide in terms of Hispanic residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Jefferson's Hispanic population has declined by an estimated 5.2%. Hispanic residents' share of Jefferson's population has remained roughly unchanged at 3.5%.

Jefferson is more Hispanic than neighboring Bagley (0% Hispanic). Jefferson is less Hispanic than neighboring Grand Junction (4.8% Hispanic), Dana (7.1% Hispanic), Churdan (6.6% Hispanic), and Scranton (7.4% Hispanic).

Jefferson's Native American/Other Population

0 residents of Jefferson, 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 Jefferson is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Jefferson ranks 493rd statewide in terms of Native American/Other residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Jefferson's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of Jefferson's population has remained roughly unchanged at 0.0%.

Jefferson is less Native American/Other than neighboring Grand Junction (0.7% Native American/Other), and Churdan (1.2% Native American/Other).

Jefferson's Multiracial Population

102 residents of Jefferson, or 2.5% of the population, identify as Multiracial. The share of Multiracial residents in Jefferson is comparable to the share in Iowa overall, where 3.5% of the population is Multiracial. Jefferson ranks 461st statewide in terms of Multiracial residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Jefferson's Multiracial population has declined by an estimated 14.3%. Multiracial residents' share of Jefferson's population has remained roughly unchanged at 2.5%.

Jefferson is more Multiracial than neighboring Dana (0% Multiracial), Churdan (2.1% Multiracial), and Bagley (2.2% Multiracial). Jefferson is less Multiracial than neighboring Grand Junction (7.1% Multiracial), and Scranton (7.6% 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.