Rock Valley Flag

Rock Valley

County:
Sioux County
County Seat:
No
Area (mi²):
4.461
State:
Iowa

Rock Valley is a city located in Sioux County, Iowa. Rock Valley has a 2025 population of 4,011 . Rock Valley is currently declining at a rate of -0.32% annually and its population has decreased by -1.52% since the most recent census, which recorded a population of 4,073 in 2020.

The average household income in Rock Valley is $91,511 with a poverty rate of 6.42%. The median age in Rock Valley is 41 years: 38.4 years for males, and 41.6 years for females. For every 100 females there are 92.0 males.

4K
Total Population
899
Density (mi²)
-13 -0.32%
Growth

Rock Valley Population

Rock Valley Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Rock Valley includes 76.36% White, 3.67% other race, and smaller percentages for and multiracial populations.

Population by Race

White (76.36%)

Two or more races (19.97%)

Other race (3.67%)

Race
Population
Percentage (of total)
White3,10176.36%
Two or more races81119.97%
Other race1493.67%

Rock Valley Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Rock Valley's average per capita income is $39,909. Household income levels show a median of $67,012. The poverty rate stands at 6.42%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$107,607-
Families$97,344$114,159
Households$67,012$91,511
Non Families$23,736$36,040

$39,909

Average Income

$67,012

Median Household Income

6.42%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)