Jefferson, IA Profile: Facts & Data

The primary coordinate point for Jefferson is located at latitude 42.0153 and longitude -94.3775 in Greene County. The formal boundaries for the City of Jefferson encompass a land area of 5.97 sq. miles and a water area of 0.04 sq. miles. Greene County is in the Central time zone (GMT -6).

The City of Jefferson has a C2 Census Class Code which indicates an active incorporated place legally coextensive with a county subdivision but treated as independent of any county subdivision. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The City of Jefferson is located within , a minor civil division (MCD) of Greene County.

Jefferson, IA Data & Demographics (As of July 1, 2025)

POPULATION
Total Population	4,156 (100%)
Population in Households	4,043 (97.3%)
Population in Families	3,101 (74.6%)
Population in Group Quarters¹	113 ( 2.7%)
Population Density	691
Diversity Index²	21


INCOME
Median Household Income	$53,220
Average Household Income	$78,882
% of Income for Mortgage⁴	17%
Per Capita Income	$35,672
Wealth Index⁵	66
Socioeconomic Status Index⁶	Moderate (50.2)

HOUSING
Total HU (Housing Units)	2,094 (100%)
Owner Occupied HU	1,392 (66.5%)
Renter Occupied HU	485 (23.2%)
Vacant Housing Units	217 (10.4%)
Median Home Value	$146,528
Average Home Value	$165,600
Housing Affordability Index³	124

HOUSEHOLDS
Total Households	1,877
Average Household Size	2.15
Family Households	1,048
Average Family Size	3.00

NOTES

Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.

Jefferson, IA - Peer Comparisons by Rank and Percentile

The table below compares Jefferson to the other 1,026 incorporated cities, towns and CDPs in Iowa by rank and percentile using July 1, 2025 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

GROWTH RATE / YEAR	2020-2025	2025-2030
Population	-0.12%	-0.93%
Households	0.05%	-0.97%
Families		0.23%
Median Household Income		2.07%
Per Capita Income		1.95%
Owner Occupied HU		-0.52%

Variable Description	Rank	Percentile
Total Population	# 100	90th
Population Density	# 462	55th
Median Household Income	# 962	6th
Housing Affordability Index	# 552	54th
Per Capita Income	# 751	27th
Diversity Index	# 316	69th

Jefferson, IA Profile: Facts & Data

Jefferson, Iowa - Basic Facts

Jefferson, IA Data & Demographics (As of July 1, 2025)

POPULATION

INCOME

HOUSING

HOUSEHOLDS

GROWTH RATE / YEAR

Jefferson, IA - Peer Comparisons by Rank and Percentile

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Greene County