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 2026 population of 4,182. Rock Valley is currently declining at a rate of -0.14% annually but its population has increased by 2.78% since the most recent census, which recorded a population of 4,069 in 2020.

The median household income in Rock Valley is $76,250 with a poverty rate of 9.26%. The median age in Rock Valley is 35.1 years: 35.6 years for males, and 31.3 years for females. For every 100 females there are 99.5 males.

4.2K
Total Population
938
Density (mi²)
-6 -0.14%
Growth

Rock Valley Population

Rock Valley Population

Year ↓
Population
Growth
Annual Change
20264,182-6-0.14%
20254,1881433.54%
20244,045-12-0.3%
20234,057-19-0.47%
20224,07620.05%
20214,074110.27%
20204,0691924.95%
20193,877250.65%
20183,852150.39%
20173,837220.58%
20163,815391.03%
20153,776571.53%
20143,719521.42%
20133,667892.49%
20123,578411.16%
20113,537471.35%
20103,4901364.05%
20002,7021626.38%
19902,540-166-6.13%
19802,70600%

Median Age

Overall: 35.1 years
Female: 31.3 years
Male: 35.6 years

Rock Valley Adults

There are 2,891 adults, (775 of whom are seniors) in Rock Valley.

Sex Ratio

Female: 2,035 (50.1%)
Male: 2,024 (49.9%)

Demographics

The racial composition of Rock Valley includes 64.28% White, 15.25% other race, and smaller percentages for Asian and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White2,60964.28%
Two or more races80919.93%
Other race61915.25%
Asian220.54%
Race
Population ↓
Percentage (of total)
Two or more races79119.49%
Other race61915.25%
White1363.35%
Race
Population ↓
Percentage (of total)
White2,47360.93%
Asian220.54%
Two or more races180.44%

Rock Valley Marital Status

Economics and Income Statistics

Rock Valley's average per capita income is $50,697. Household income levels show a median of $76,250. The poverty rate stands at 9.26%.

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$99,504-
Families$98,858$108,844
Households$76,250$88,860
Non Families$22,611$26,248

$50,697

Average Income

$76,250

Median Household Income

9.26%

Poverty Rate

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)