City · Iowa
Dike, Iowa
Dike, city, in Grundy County, Iowa. Dike had 1,299 residents on July 1, 2025 by the Census Bureau's estimate, down 0.2% since 2020; the 2020 Census counted 1,304 and the ACS 2020-2024 5-year estimates put it at 1,365 (±188). GEOID 1921405.
Residents, July 2025 estimate
1,299
Census Bureau estimate (no margin published)
2020 Census count: 1,304 · ACS 2020-2024: 1,365 ±188
Median household income
$91,146
±$16,450 (90% margin)
Iowa: $75,059
Median home value
$247,800
±$17,116 (90% margin)
Iowa: $208,000
Median gross rent
$711
±$184 (90% margin)
Iowa: $972
Where is Dike and what county is it in?
Dike is a city in Grundy County, Iowa. It covers 1.4 square miles of land, 939 residents per square mile in 2020.
Dike is in the Waterloo-Cedar Falls, IA metropolitan statistical area, which takes in 3 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Dike, and is it growing?
The Census Bureau estimates that 1,299 people lived in Dike on July 1, 2025, down 0.2% since 2020, while Iowa grew 1.5%. The 2020 Census counted 1,304 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 1,365 (±188).
| Measure | Dike | Grundy County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 1,365 ±188 | 12,384 | no clear change |
| Households | 534 ±66 | 5,117 | no clear change |
| Average household size | 2.56 ±0.24 | 2.39 | no clear change |
| Housing units | 554 ±74 | 5,498 | no clear change |
Dike's population since 2000
From 944 in 2000 to 1,299 in 2025: up 37.6%. The 2000, 2010 and 2020 figures are census counts, each for Dike as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Dike?
The median resident of Dike is 39.6 years old; 27.0% are under 18 and 22.0% are 65 or older. The largest group is non-Hispanic white residents at 96.1%, then non-Hispanic residents of two or more races at 2.7%.
| Measure | Dike | Grundy County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 39.6 ±2.0 | 41.9 | no clear change |
| Under 18 years | 27.0% ±4.7 pts | 23.5% | – |
| 65 years and over | 22.0% ±5.5 pts | 21.0% | – |
| Male | 53.3% ±3.8 pts | 49.5% | – |
| Hispanic or Latino (any race) | 0.4% ±0.6 pts | 1.8% | – |
| White alone, not Hispanic | 96.1% ±2.3 pts | 94.9% | no clear change |
| Black or African American alone, not Hispanic | 0.0% ±1.8 pts | 0.6% | – |
| Asian alone, not Hispanic | 0.7% ±0.7 pts | 0.5% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±1.8 pts | 0.5% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.8 pts | 0.0% | – |
| Two or more races, not Hispanic | 2.7% ±2.3 pts | 1.1% | – |
| Some other race alone, not Hispanic | 0.0% ±1.8 pts | 0.8% | – |
| Born outside the United States | 2.6% ±1.9 pts | 1.7% | – |
| Speak a language other than English at home (age 5+) | 1.8% ±2.0 pts | 2.2% | – |
| Civilian veterans (age 18+) | 4.4% ±1.7 pts | 5.9% | – |
| With a disability | 8.3% ±2.6 pts | 12.0% | – |
| No health insurance coverage | 2.6% ±2.1 pts | 3.8% | – |
| High school graduate or higher (age 25+) | 95.8% ±2.6 pts | 96.9% | – |
| Bachelor's degree or higher (age 25+) | 42.5% ±5.5 pts | 27.8% | no clear change |
| Graduate or professional degree (age 25+) | 13.5% ±3.8 pts | 7.4% | – |
| Lived in the same house a year earlier | 93.1% ±3.2 pts | 91.7% | – |
| Moved from another state in the past year | 0.0% ±1.8 pts | 1.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Dike earn?
Half of Dike's 534 households earn less than $91,146 a year (±$16,450), against $87,205 in Grundy County and $75,059 in Iowa. In 2015-2019 it was $103,199 in 2024 dollars; the margins of error cannot tell the two periods apart. 5.4% of residents live below the poverty line.
| Measure | Dike | Grundy County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $91,146 ±$16,450 | $87,205 | no clear change |
| Mean household income | $114,841 ±$13,350 | $101,039 | – |
| Per capita income | $47,243 ±$4,174 | $42,005 | no clear change |
| People below the poverty line | 5.4% ±2.7 pts | 6.5% | no clear change |
| Children under 18 below the poverty line | 1.9% ±3.1 pts | 6.0% | – |
| Households receiving SNAP | 1.5% ±1.8 pts | 4.4% | – |
| Households with a computer | 92.9% ±4.7 pts | 93.2% | – |
| Households with a broadband subscription | 92.1% ±4.4 pts | 88.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Dike?
Owners occupy 88.6% of Dike's occupied homes and renters 11.4%. The median owner-occupied home is valued at $247,800 by its owner (±$17,116). The median renter pays $711 a month including utilities.
| Measure | Dike | Grundy County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $247,800 ±$17,116 | $198,800 | no clear change |
| Median gross rent | $711 ±$184 | $774 | no clear change |
| Renters paying 35% or more of income on rent | 24.5% ±29.8 pts | 24.2% | – |
| Median monthly owner costs, with a mortgage | $1,628 ±$141 | $1,489 | – |
| Owner-occupied homes | 88.6% ±4.6 pts | 84.5% | no clear change |
| Renter-occupied homes | 11.4% ±4.6 pts | 15.5% | – |
| Housing units | 554 ±74 | 5,498 | no clear change |
| Homeowner vacancy rate | 0.0% ±5.1 pts | 0.2% | – |
| Rental vacancy rate | 12.9% ±18.7 pts | 10.6% | – |
| Single-family detached homes | 76.9% ±5.7 pts | 85.0% | – |
| Mobile homes | 0.0% ±4.4 pts | 2.9% | – |
| Built 2020 or later | 0.0% ±4.4 pts | 0.7% | – |
| Built 2010 to 2019 | 9.2% ±3.4 pts | 3.3% | – |
| Built 1939 or earlier | 19.5% ±5.7 pts | 33.4% | – |
| Households with no vehicle | 7.3% ±6.0 pts | 3.2% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Dike building?
Builders took permits for 1 new housing units in Dike in 2025 (1 in single-family houses), 0.8 per 1,000 residents against 4.2 across Iowa.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Dike work and get to work?
81.2% of Dike's workers drive alone and 10.3% work from home. The average trip to work takes 19.8 minutes.
| Measure | Dike | Grundy County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 65.8% ±6.3 pts | 65.7% | – |
| Unemployment rate | 1.5% ±1.1 pts | 2.0% | – |
| Drove alone to work | 81.2% ±5.1 pts | 80.7% | – |
| Carpooled | 5.2% ±4.2 pts | 7.1% | – |
| Public transportation | 0.0% ±3.7 pts | 0.0% | – |
| Walked | 2.8% ±1.9 pts | 2.4% | – |
| Worked from home | 10.3% ±4.1 pts | 9.5% | +5.3 pts |
| Mean travel time to work | 19.8 min ±1.7 | 23.5 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Dike?
No census tract lies mostly in Dike; 1 tract reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9601Grundy County | 4,514 | $92,314 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Dike) · Census block assignment files
How does Dike compare with other places in Iowa?
By the Census Bureau's July 2025 estimates, Dike is the 9,313th-most populous of the 19,476 U.S. incorporated places that have one and the 228th-most populous of 939 in Iowa.
Dike ranks 59th of 279 places in Iowa with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 228th | 939 |
| Growth 2020-2025 (PEP) | 125th | 275 |
| Residents per square mile | 178th | 279 |
| Median household income | 59th | 279 |
| Per capita income | 38th | 279 |
| Median home value | 52nd | 279 |
| Median gross rent | 227th | 266 |
| Poverty rate | 201st | 232 |
| Bachelor's degree or higher | 36th | 279 |
| Median age | 141st | 279 |
| Owner-occupied share | 19th | 279 |
| Work from home | 91st | 221 |
| Travel time to work | 144th | 279 |
Dike's figures with every place in Iowa (CSV)
Every place in Iowa, sortable · Compare Dike with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Dike?
23 of the 57 figures for Dike on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Dike are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in Dike.