Spencer, IA Profile: Facts & Data


Spencer Local Links & Resources:
Resources | ALL Spencer Content
Planning to visit Spencer? See Local Hotels

Also See: Spencer, IA ZIP Codes & ZIP Code Maps

Spencer, Iowa - Basic Facts

Quick & Easy Tools

The City of Spencer had a population of 11,288 as of July 1, 2021. Spencer ranks in the upper quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Iowa. See peer rankings below.

The primary coordinate point for Spencer is located at latitude 43.1414 and longitude -95.1444 in Clay County. The formal boundaries for the City of Spencer encompass a land area of 10.83 sq. miles and a water area of 0.16 sq. miles. Clay County is in the Central time zone (GMT -6). The elevation is 1,319 feet.

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

Jump to... (On This Page!)
  1. Spencer 2021 Demographic Data
  2. Growth Rates for Spencer (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Iowa Research Tools (Easy Tools & Current Data)
  3. Iowa Data Comparison Tool - 2021 Demographics

Spencer, IA Data & Demographics (As of July 1, 2021)


Total Population 11,288 (100%)
Population in Households 11,083 (98.2%)
Population in Families 8,396 (74.4%)
Population in Group Quarters1 205 ( 1.8%)
Population Density 1,033
Diversity Index2 22


Median Household Income $49,023
Average Household Income $62,251
% of Income for Mortgage4 12%
Per Capita Income $28,060
Wealth Index5 53


Total HU (Housing Units) 5,685 (100%)
Owner Occupied HU 3,245 (57.1%)
Renter Occupied HU 1,852 (32.6%)
Vacant Housing Units 588 (10.3%)
Median Home Value $144,121
Average Home Value $157,599
Housing Affordability Index3 174


Total Households 5,097
Average Household Size 2.17
Family Households 3,009
Average Family Size 3
  1. 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.
  2. 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.
  3. 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.
  4. 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).
  5. 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.


2010-2021 2021-2026
Population 0.04% -0.14%
Households 0.14% -0.1%
Families 0.0% -0.19%
Median Household Income   1.2%
Per Capita Income   1.61%
Owner Occupied HU   -0.03%

Spencer, IA - Peer Comparisons by Rank and Percentile

The table below compares Spencer to the other 1,008 incorporated cities, towns and CDPs in Iowa by rank and percentile using July 1, 2021 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 # 35 97th
Population Density # 278 73rd
Median Household Income # 895 11th
Housing Affordability Index # 295 29th
Per Capita Income # 727 28th
Diversity Index # 175 83rd

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

Spencer, IA - Most Popular Things to Do

Also See: Nearby Hotels | Driving Directions

Use HTL Address Research for a Iowa Address and get...

Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2021, data includes home values, household income, percentage of homes owned, rented or vacant, etc.

Quick & Easy Ways to...

  1. Get Current Demographic Data for Cities, Towns, and ZIP Codes
  2. View Boundary Maps, for Cities, Towns, and ZIP Codes
  3. Locate Physical, Cultural, and Historical Features

Iowa Census Data Comparison Tool

Compare Iowa July 1, 2021 Data
Highest or Lowest: