Janesville, IA Profile: Facts, Map & Data


Janesville Local Links & Resources:
Hotels | Resources | ALL Janesville Content

Also See: Janesville, IA ZIP Codes & ZIP Code Maps | Local Area Photos

Janesville, Iowa - Basic Facts

Real Estate Resources

The City of Janesville had a population of 1,045 as of July 1, 2017.

The primary coordinate point for Janesville is located at latitude 42.6458 and longitude -92.4624 in Bremer County. The formal boundaries for the City of Janesville (see map below) encompass a land area of 1.44 sq. miles and a water area of 0.05 sq. miles. Bremer County is in the Central time zone (GMT -6). The elevation is 899 feet.

While the primary coordinates for City of Janesville are located in Bremer County, it should be noted that the formal boundaries for this community also extend into and Black Hawk County.

The City of Janesville (GNIS ID: 2395456) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The City of Janesville is located within Township of Jackson, a minor civil division (MCD) of Bremer County.

Beneath the boundary map are tables with Janesville population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

EXTREMELY LOCAL Demographic Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting demographic data.


City of Janesville, IA Boundary Map

Also See: BIG Map | Driving Directions | IA Congressional Districts
Boundary Maps: Township of Jackson | Bremer County | Iowa Counties

Search the map for:

Janesville, IA Data & Demographics (As of July 1, 2017)


Total Population 1,045
Daytime Population: Workers 609
Daytime Population: Residents 520
Total Daytime Population (TDP) 1,129
Ratio TDP/Total Population1 1.08
Population in Households 1,045
Population in Familes 866
Population in Group Qrtrs 0
Population Density2 728
Diversity Index3 8


Median Household Income $59,514
Average Household Income $75,201
Per Capita Income $31,219


Total Housing Units 447 (100%)
Owner Occupied HU 365 (81.7%)
Renter Occupied HU 84 (18.8%)
Vacant Housing Units 0
Median Home Value $210,714
Average Home Value $265,865


Total Households 449
Average Household Size 2.33
Family Households 312
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. 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 race 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.


2010-2017 2017-2022
Population 1.62% 1.32%
Households 1.68% 1.39%
Families 2.44% 1.31%
Median Household Income   2.02%
Per Capita Income   2.72%

Janesville, IA - Peer Comparisons by Rank and Percentile

The table below compares Janesville to the other 1,009 incorporated cities, towns and CDPs in Iowa by rank and percentile using July 1, 2017 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.

Variable Description Rank Percentile
Total Population # 280 72nd
Population Density # 468 54th
Diversity Index # 624 39th
Median Household Income # 276 73rd
Per Capita Income # 226 78th

Additional comparisons and rankings can be made with a VERY EASY TO USE Iowa Census Data Comparison Tool.

Iowa Research Tools

Iowa Census Data Comparison Tool

Compare Iowa Census Data
Highest or Lowest: