Delaware County IA Information


Delaware County Subdivisions

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


Total Population 18,170
Daytime Population: Workers 8,093
Daytime Population: Residents 8,109
Total Daytime Population (TDP) 16,202
Ratio TDP/Total Population1 0.89
Population in Households 17,952
Population in Familes 15,015
Population in Group Qrtrs 218
Population Density2 31
Diversity Index3 7


Median Household Income $53,425
Average Household Income $65,745
Per Capita Income $26,349


Total Housing Units 8,237 (100%)
Owner Occupied HU 5,733 (69.6%)
Renter Occupied HU 1,514 (18.4%)
Vacant Housing Units 990 (12.0%)
Median Home Value $139,686
Average Home Value $178,192


Total Households 7,247
Average Household Size 2.48
Family Households 5,063
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 0.31% 0.16%
Households 0.36% 0.19%
Families 0.22% 0.1%
Median Household Income   2.88%
Per Capita Income   2.79%


Delaware County IA - Peer Comparisons by Rank and Percentile

The table below compares Delaware County to the other 99 counties and county equivalents 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 # 39 62nd
Population Density # 39 62nd
Diversity Index # 96 4th
Median Household Income # 36 65th
Per Capita Income # 63 37th

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