55309 ZIP Code — Big Lake, MN
Sherburne County, Minnesota
ZIP code 55309 is located in Big Lake, Minnesota, within Sherburne County. It covers approximately 62.31 square miles and serves a population of 20,894 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 763.
About ZIP code 55309
The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $309,600. Owner-occupancy is high at 90%, well above the national average.
Median household income is $109,588. The poverty rate of 4% is below the national average.
The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 33 minutes is near the national average.
Educational attainment is near the national average, with 29% of residents holding a bachelor's degree or higher.
20,894
population
62.31
sq mi land
Standard
ZIP type
Central (CT)
timezone
55309 ZIP code map
Cities in ZIP code 55309
Below are the cities the US Postal Service accepts for ZIP code 55309. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Big Lake | Preferred |
Nearby ZIP codes
55308 Becker (4.4 mi)
55362 Monticello (7.1 mi)
55330 Elk River (8.7 mi)
55398 Zimmerman (9.2 mi)
55301 Albertville (11.3 mi)
55319 Clear Lake (11.6 mi)
55371 Princeton (13.5 mi)
55376 Saint Michael (14.7 mi)
55376 Saint Michael (14.7 mi)
55320 Clearwater (15.5 mi)
55313 Buffalo (15.6 mi)
55313 Buffalo (15.6 mi)
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 20,894 |
| Population density | 335 / sq mi |
| State FIPS | 27 |
| County FIPS | 141 |
| Geography | |
|---|---|
| Land area | 62.31 sq mi |
| Water area | 3.35 sq mi |
| Latitude | 45.4060 |
| Longitude | -93.7416 |
| Timezone | Central (CT) |
| Area code | 763 |
Total population by age
Gender
Race & ethnicity
Economics
updated 05/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 21.6% | 26.8% | 33.6% |
| $50k – $100k | 31.2% | 33.1% | 31.5% |
| $100k – $200k | 36.7% | 33.4% | 26.5% |
| Over $200k | 10.6% | 6.7% | 8.5% |
Demographics & statistics
20,894
Population
335
People per sq mi
36.4
Median age
$109,588
Median household income
$44,794
Per capita income
$309,600
Median home value
$1,321
Median monthly rent
90.0%
Home ownership
3.5%
Poverty rate
2.5%
Unemployment
6,658
Housing units
29.3%
Bachelor's or higher
Age distribution
Male
Female
623
Under 5
633
716
5–9
728
931
10–14
948
768
15–19
782
847
20–24
862
1,043
25–34
1,061
1,630
35–44
1,658
1,589
45–54
1,617
651
55–59
662
661
60–64
672
664
65–74
676
181
75–84
185
53
85+
53
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 5,645 | 27.0% |
| 18 and over | 15,249 | 73.0% |
| 65 and over | 1,812 | 8.7% |
| Median age | 36.4 years | |
Race & ethnicity
White
88.7%
Two or more races
4%
Hispanic or Latino
3.1%
Black or African American
1.9%
Other race
1.6%
Asian
0.3%
American Indian / Alaska Native
0.3%
| Group | Count | % |
|---|---|---|
| White | 19,133 | 88.7% |
| Two or more races | 873 | 4% |
| Hispanic or Latino | 667 | 3.1% |
| Black or African American | 411 | 1.9% |
| Other race | 351 | 1.6% |
| Asian | 69 | 0.3% |
| American Indian / Alaska Native | 57 | 0.3% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 21.6% | 26.8% | 33.6% |
| $50k – $100k | 31.2% | 33.1% | 31.5% |
| $100k – $200k | 36.7% | 33.4% | 26.5% |
| Over $200k | 10.6% | 6.7% | 8.5% |
Under $10k
1.0%
$10k–$15k
0.7%
$15k–$25k
2.1%
$25k–$35k
5.5%
$35k–$50k
7.8%
$50k–$75k
12.2%
$75k–$100k
14.9%
$100k–$150k
28.3%
$150k–$200k
14.6%
$200k+
12.9%
| Range | % of households |
|---|---|
| Under $10k | 1.0% |
| $10k–$15k | 0.7% |
| $15k–$25k | 2.1% |
| $25k–$35k | 5.5% |
| $35k–$50k | 7.8% |
| $50k–$75k | 12.2% |
| $75k–$100k | 14.9% |
| $100k–$150k | 28.3% |
| $150k–$200k | 14.6% |
| $200k+ | 12.9% |
| Median income | $109,588 |
Housing
Home values
Under $50k
4.8%
$50k–$100k
0.1%
$100k–$150k
1.3%
$150k–$200k
4.5%
$200k–$300k
36.6%
$300k–$500k
42.5%
$500k–$1M
10.1%
$1M+
0.1%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $309,600 |
| Median rent / month | $1,321 |
| Owner occupied | 90.0% |
| Renter occupied | 10.0% |
| Vacant | 3.6% |
| Single-family detached | 90.6% |
| Large apartment buildings | 2.5% |
| Mobile homes | 1.8% |
| Median rooms | 7.1 |
| Avg household size (owned) | 2.99 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.3% |
| 2010–2019 | 10.4% |
| 2000–2009 | 31.6% |
| 1990–1999 | 26.0% |
| 1980–1989 | 10.9% |
| 1970–1979 | 8.6% |
| 1960–1969 | 3.5% |
| 1950–1959 | 3.4% |
| 1940–1949 | 1.8% |
| 1939 or earlier | 3.5% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 0.1% |
| 1 bedroom | 3.5% |
| 2 bedrooms | 13.1% |
| 3 bedrooms | 37.4% |
| 4 bedrooms | 37.3% |
| 5+ bedrooms | 8.6% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 3.4% |
| 1 vehicle | 12.8% |
| 2 vehicles | 41.9% |
| 3 or more | 41.8% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 79.2% |
| Electricity | 15.9% |
| Propane / LP gas | 2.9% |
| Fuel oil | 0.6% |
| Wood | 0.6% |
| No fuel used | 0.1% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 4,496 | 63.3% |
| Cohabiting couple | 607 | 8.5% |
| Male householder, no spouse | 801 | 11.3% |
| Female householder, no spouse | 1,200 | 16.9% |
| Households with children under 18 | 3,070 | 43.2% |
| Households with seniors (65+) | 1,278 | 18.0% |
| Average household size | 2.94 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 31.4% | 28.7% |
| Married | 58.7% | 53.9% |
| Separated | 0.2% | 3.0% |
| Widowed | 1.1% | 5.5% |
| Divorced | 8.7% | 9.0% |
Education
Less than 9th grade
1.0%
Some HS, no diploma
4.2%
HS graduate
27.9%
Some college, no degree
22.8%
Associate's degree
14.9%
Bachelor's degree
21.3%
Graduate / professional
8.0%
| Metric | % |
|---|---|
| HS diploma or higher | 94.8% |
| Bachelor's or higher | 29.3% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 252 | 4.4% |
| Kindergarten | 422 | 7.4% |
| Elementary school | 2,393 | 41.7% |
| High school | 1,560 | 27.2% |
| College / grad school | 1,106 | 19.3% |
Employment
Industry of employment
Education & healthcare
21.4%
Manufacturing
14.7%
Construction
11.5%
Retail trade
9.7%
Transportation & utilities
9.4%
Arts, food & hospitality
7.7%
Professional & management
7.4%
Wholesale trade
5.4%
Other services
4.7%
Finance & real estate
4.1%
Public administration
2.9%
Agriculture & mining
0.6%
Information
0.6%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 34.7% |
| Service | 14.2% |
| Sales & office | 18.8% |
| Natural resources & construction | 12.2% |
| Production & transportation | 20.1% |
Employment type
| Type | % |
|---|---|
| Private sector | 83.7% |
| Government | 13.2% |
| Self-employed | 3.2% |
| Unpaid family workers | 0.0% |
Commute
| Method | % |
|---|---|
| Drive alone | 76.3% |
| Carpool | 10.6% |
| Public transit | 1.5% |
| Walk | 0.5% |
| Work from home | 10.5% |
| Other means | 0.6% |
| Avg commute (minutes) | 33.2 |
Poverty
All people
3.5%
Under 18 years
5.1%
18 and over
2.9%
Married-couple families
1.2%
Female-led households
9.1%
Income support
| Source | % of households |
|---|---|
| Social Security | 20.2% |
| Retirement income | 17.4% |
| Supplemental Security | 3.6% |
| Cash public assistance | 1.9% |
| Food stamps / SNAP | 3.0% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 36.9% |
| High blood pressure | 23.7% |
| High cholesterol | 24.9% |
| Diabetes | 6.3% |
| Heart disease | 3.9% |
| Stroke | 1.9% |
| Asthma | 8.7% |
| Arthritis | 17.8% |
| Kidney disease | 1.9% |
| Pulmonary disease | 4.0% |
| Cancer | 4.7% |
| Behavior / access | % |
|---|---|
| Smoking | 18.2% |
| Binge drinking | 24.1% |
| No physical activity | 18.2% |
| Less than 7 hrs sleep | 27.8% |
| Depression | 22.5% |
| Fair or poor health | 9.2% |
| Poor mental health | 14.4% |
| Poor physical health | 7.5% |
| No health insurance | 10.6% |
| Visited doctor (checkup) | 64.7% |
| Visited dentist | 69.9% |
| Cholesterol screening | 87.4% |
| Teeth loss | 8.8% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 962 | 6.3% |
| Disability | % |
|---|---|
| Any disability | 8.6% |
| Under 18 | 4.3% |
| 18–64 years | 7.7% |
| 65 and over | 28.6% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 85.8% |
| Public insurance | 21.9% |
| No insurance | 3.8% |
| Uninsured under 19 | 1.9% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 19,638 | 94.0% |
| Spanish | 106 | 0.5% |
| Other Indo-European | 93 | 0.5% |
| Asian & Pacific Islander | 0 | 0.0% |
| Other languages | 13 | 0.1% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 20,529 | 98.3% |
| Born in same state | 20,396 | 97.6% |
| Born in different state | 17,395 | 83.3% |
| Foreign born | 133 | 0.6% |
| Naturalized citizen | 365 | 1.7% |
| Not a US citizen | 285 | 78.1% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Polish | 3,032 | 14.5% |
| Italian | 1,924 | 9.2% |
| French | 1,064 | 5.1% |
| Arab | 644 | 3.1% |
| Ancestry | Count | % |
|---|---|---|
| German | 247 | 1.2% |
| Dutch | 70 | 0.3% |
| English | 58 | 0.3% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 34.0% |
| Internet access | 98.3% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 55309
What city is ZIP code 55309 in?
ZIP code 55309 is primarily assigned to Big Lake, Minnesota.
What county is ZIP code 55309 in?
ZIP code 55309 falls within Sherburne County, Minnesota.
Is ZIP code 55309 mostly owner-occupied?
90% of occupied units in ZIP code 55309 are owner-occupied, well above the national average.
What is the median household income in ZIP code 55309?
The median household income in ZIP code 55309 is $109,588, above the national median of ~$75,000.
What is the typical home value in ZIP code 55309?
The median home value in ZIP code 55309 is $309,600.
What is the population of ZIP code 55309?
ZIP code 55309 has an estimated population of 20,894 residents, with a density of 335 people per square mile.
What timezone is ZIP code 55309 in?
ZIP code 55309 observes the CST timezone.