St. Croix County, WI demographics:
population, income, and more

Total population
96,033
1.3% year-over-year change
Median household income
$103,046/yr
0.6% year-over-year change
Housing units
38,953
2.0% year-over-year change

St. Croix County population

How many people live in St. Croix County

St. Croix County is home to 96,033 residents, according to the most recent Census data. Gender-wise, 50.5% of St. Croix County locals are male, and 49.5% are female.

Total population
96,033
1.3% year-over-year change
Gender ratio
Male
50.5%
48,467
Female
49.5%
47,566
Value Percent YoY change
Male 48,467 50.5% 1.6%
Female 47,566 49.5% 1.0%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in St. Croix County is 40, with the population distributed as follows: about 19.2% are children under 15, then 11.9% are in the 15 to 24 age group. Adults between 25 and 44 make up 25.3% of the population, while another 27.6% fall into the 45 to 64 bracket. Finally, around 16% are 65 or older.

Median age
40.4
Age breakdown
Under 15
19.2%
15 to 24
11.9%
25 to 44
25.3%
45 to 64
27.6%
Over 65
16%
Value Percent YoY change
Under 15 18,451 19.2% -0.6%
15 to 24 11,430 11.9% 1.0%
25 to 44 24,325 25.3% 1.1%
45 to 64 26,465 27.6% 0.5%
Over 65 15,362 16% 5.7%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In St. Croix County, 97% of the population are US-born citizens, while 1.9% have gained naturalized citizenship. At the same time, 1.1% of residents are non-citizens. As for race, 92.1% of locals are Caucasian, 0.7% are African American and 1.1% have Asian roots. There’s also a share of 4.8% that includes residents with two or more races.

Citizenship
U.S.-born citizens
97%
Non-U.S.-born citizens
1.9%
Non-citizens
1.1%
Value Percent YoY change
U.S.-born citizens 93,156 97% 1.4%
Non-U.S.-born citizens 1,849 1.9% -6.1%
Non-citizens 1,028 1.1% 8.0%
Racial breakdown
White
92.1%
Black or African American
0.7%
American Indian and Alaska Native
0.1%
Asian
1.1%
Native Hawaiian and other Pacific Islander
0%
Two or more races
4.8%
Other
1.2%
Value Percent
White 88,464 92.1%
Black or African American 662 0.7%
American Indian and Alaska Native 60 0.1%
Asian 1,067 1.1%
Native Hawaiian and other Pacific Islander 23 0%
Two or more races 4,572 4.8%
Other 1,185 1.2%

Households in St. Croix County

A peek inside St. Croix County households

St. Croix County has 37,511 households, with an average of 3 members in each. Of these, 70.4% are families, while the remaining 29.6% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
37,511
2.1% year-over-year change
Average people per household
3
Non-family households
11,084
Family households
26,427
Value Percent YoY change
Non-family households 11,084 29.6% 3.7%
Family households 26,427 70.4% 1.5%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in St. Croix County

The housing landscape of St. Croix County

St. Croix County's housing consists of 38,953 units, with 73.6% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 8.5% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 2.8% of the housing landscape.

Housing units
38,953
2.0% year-over-year change
Housing types
Value Percent
1 unit, detached 28,679 73.6%
1 unit, attached 3,301 8.5%
2 units 1,005 2.6%
3 or 4 units 1,215 3.1%
5 to 9 units 1,122 2.9%
10 to 19 units 656 1.7%
20 to 49 units 1,094 2.8%
50 or more units 781 2%
Mobile home 1,100 2.8%
Homes built since 2020
1,181
87.2% year-over-year change

The age of buildings in St. Croix County

In St. Croix County, the median construction year is 1993. About 11.4% of homes were built before the 1940s, with another 1.9% going up by 1949. Most development happened in the second half of the 20th century. Then, 25.8% of homes were added from 2000 to 2009, 10.6% between 2010 and 2019, and 3% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 4,447 11.4% 3.3%
Built between 1940 and 1949 740 1.9% 1.1%
Built between 1950 and 1959 1,609 4.1% -2.7%
Built between 1960 and 1969 1,826 4.7% 1.8%
Built between 1970 and 1979 4,335 11.1% 0.1%
Built between 1980 and 1989 4,627 11.9% 1.6%
Built between 1990 and 1999 5,995 15.4% 3.6%
Built between 2000 and 2009 10,062 25.8% -3.7%
Built between 2010 and 2019 4,131 10.6% 4.6%
Built in 2020 or later 1,181 3% 87.2%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

St. Croix County occupancy rates

Out of the 37,511 occupied housing units in St. Croix County, 78.3% are owner-occupied, while 21.7% are lived in by tenants. Meanwhile, 3.7% of all homes on the local market sit vacant.

Occupied housing units
37,511
2.1% year-over-year change
Occupancy breakdown
Renter occupied
8,134
Owner occupied
29,377
Value Percent YoY
change
Renter occupied 8,134 21.7% 5.1%
Owner occupied 29,377 78.3% 1.3%
Unoccupied housing units
3.7%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

St. Croix County housing costs

Housing costs in St. Croix County come to a median of $1,559 per month, while tenants specifically pay a median gross rent of $1,271.

Median housing costs per month
$1,559/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in St. Croix County
$1,271/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in St. Croix County

St. Croix County education at a glance

About 29% of the population in St. Croix County went to high school, while 20.8% pursued college studies. Another 12.2% earned an associate degree and 25.7% hold a bachelor’s. Meanwhile, 11.2% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 795 1.1% -2.3%
High school diploma 21,196 29% 0.1%
College diploma 15,195 20.8% 3.2%
Associate degree 8,956 12.2% 3.6%
Bachelor's degree 18,843 25.7% -0.2%
Graduate degree 8,209 11.2% 6.7%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in St. Croix County

How much people earn in St. Croix County

The average annual household income in St. Croix County was $126,955 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +2.4% change from the previous year. At the same time, the median income stood at $103,046, reflecting a +0.6% shift over the same period.

Average household income in St. Croix County
$126,955/year
2.4% year-over-year change
Median household income in St. Croix County
$103,046/year
0.6% year-over-year change

St. Croix County income by age

In St. Croix County, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $121,436. Those with someone between 45 and 64 in charge, often well established professionally, earn $120,293 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $64,953, while those led by someone over 65, many of whom may be retired, have about $63,226 in earnings. Overall, 93.4% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $64,953 9.9%
25 - 44 $121,436 4.5%
45 - 64 $120,293 0.7%
Over 65 $63,226 -5.0%
Above poverty level
88,046
Below poverty level
6,249
Value Percent YoY
change
Above poverty level 88,046 93.4% 1.4%
Below poverty level 6,249 6.6% 1.3%

Employment in St. Croix County

Workforce and job types in St. Croix County

The job market in St. Croix County is powered by 51,144 working residents, spread across a range of industries and roles. 76.5% of the working population are employed in professional or administrative positions, while 23.5% are in hands-on or service-based jobs. Also, 10.2% run their own businesses, 68.4% are employed by private companies, and 14% work in the public sector.

Workforce demographics

Working population
51,144
-0.0% year-over-year change
White collar
39,122
Blue collar
12,022
Value Percent YoY change
White collar 39,122 76.5% 0.8%
Blue collar 12,022 23.5% -2.7%
Employer type
Self employees
10.2%
Private companies
68.4%
Governmental workers
14%
Not for profit companies
7.4%
Value Percent YoY change
Self employees 5,195 10.2% -3.8%
Private companies 35,006 68.4% 0.4%
Governmental workers 7,162 14% 1.6%
Not for profit companies 3,781 7.4% -1.8%
Unemployment rate
2.6%
31.3% year-over-year change

Available workforce

The unemployment rate in St. Croix County stands at 2.6%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in St. Croix County

How people get around in St. Croix County

Commuting methods vary: 80.7% of residents travel by personal vehicle and 1.5% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Means of transportation
Value Percent YoY change
Car 40,869 80.7% -2.5%
Taxicab 5 0% N/A
Bus or trolleybus 31 0.1% -63.1%
Subway or elevated 3 0% N/A
Railroad 7 0% -66.7%
Motorcycle 13 0% -13.3%
Bicycle 94 0.2% 11.9%
Walk 773 1.5% 13.2%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in St. Croix County by zipcode?

Zipcode Population Number of households Median income Average income
54002 6,872 2,561 $88,275 $104,111
54005 3,264 1,217 $87,813 $106,780
54007 1,175 459 $85,398 $108,183
54013 3,443 1,492 $87,500 $100,777
54015 4,086 1,444 $114,293 $119,270
54016 33,398 13,459 $113,085 $151,732
54017 20,366 7,684 $98,571 $108,698
54022 24,789 8,799 $96,642 $118,389
54023 4,620 1,722 $108,466 $120,655
54025 7,612 3,062 $86,930 $112,367

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FAQs about St. Croix County demographics 

What is the total population of St. Croix County?

St. Croix County has a total population of 96,033 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +1.3% compared to a year ago.

What is the gender ratio in St. Croix County?

The gender ratio in St. Croix County is as follows:
  • 50.5% males (48,467 residents)
  • 49.5% females (47,566 residents)

What is the median age in St. Croix County?

The median age in St. Croix County is 40.4.

What is the age distribution of the population in St. Croix County?

The age distribution in St. Croix County is as follows:
  • Under 15: 19.2% (18,451 residents)
  • Ages 15-24: 11.9% (11,430 residents)
  • Ages 25-44: 25.3% (24,325 residents)
  • Ages 45-64: 27.6% (26,465 residents)
  • Over 65: 16% (15,362 residents)

What is the racial and ethnic makeup of St. Croix County?

The racial and ethnic makeup of St. Croix County is as follows:
  • White: 92.1% (88,464 residents)
  • Black or African American: 0.7% (662 residents)
  • American Indian and Alaska Native: 0.1% (60 residents)
  • Asian: 1.1% (1,067 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (23 residents)
  • Two or More Races: 4.8% (4,572 residents)
  • Other: 1.2% (1,185 residents)

What percentage of the population in St. Croix County are U.S.-born citizens?

U.S.-born citizens represent 97% of the population in St. Croix County.

How many housing units are there in St. Croix County?

There are 38,953 housing units in St. Croix County, reflecting a +2.0% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in St. Croix County and what is the average household size?

St. Croix County has a total of 37,511 households, with an average of 3 people in each.

What is the median household income in St. Croix County?

St. Croix County has a median household income of $103,046, representing a +0.6% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for St. Croix County?

The employment rate is 97.4% in St. Croix County, with a workforce of 51,144 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 76.5% (39,122 residents)
  • Blue-collar workers: 23.5% (12,022 residents)

Places of employment:
  • Self-employed: 10.2% (5,195 residents)
  • Private companies: 68.4% (35,006 residents)
  • Governmental workers: 14% (7,162 residents)
  • Not-for-profit companies: 7.4% (3,781 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025