40328 ZIP Code — Gravel Switch, KY

Marion County, Kentucky

ZIP code 40328 is located in Gravel Switch, Kentucky, within Marion County. It covers approximately 60.42 square miles and serves a population of 1,097 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 270/364.

About ZIP code 40328

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1990s, giving the area an established character. Median home value is $83,000. Owner-occupancy is high at 88%, well above the national average.

Median household income is $46,250. 58% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is production, transportation, and material moving, with manufacturing as the leading industry. The average commute of 27 minutes is near the national average.

College attainment at 9% is below the national average, consistent with a trades and production-oriented local economy.

Health indicators show elevated rates of smoking (29%) compared to national benchmarks.

Notable community characteristics include disability rates above the national average at 30%.

Overall, ZIP code 40328 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

1,097

population

60.42

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

40328 ZIP code map

Cities in ZIP code 40328

Below are the cities the US Postal Service accepts for ZIP code 40328. Using any city not on this list may result in mail delivery delays.

City	Status
Gravel Switch	Preferred

Nearby ZIP codes

40464 Parksville (3.5 mi) 40468 Perryville (6.9 mi) 40009 Bradfordsville (7 mi) 40440 Junction City (9.6 mi) 40437 Hustonville (12.3 mi) 40422 Danville (12.6 mi) 40033 Lebanon (13 mi) 40040 Mackville (13.5 mi) 42541 Middleburg (16.3 mi) 40069 Springfield (16.4 mi) 40484 Stanford (16.9 mi) 42539 Liberty (18.4 mi)

Demographics updated 05/2026

Population
Total population	1,097
Population density	18 / sq mi
State FIPS	21
County FIPS	155

Geography
Land area	60.42 sq mi
Water area	0.34 sq mi
Latitude	37.5518
Longitude	-85.0136
Timezone	Eastern (ET)
Area code	270/364

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	61.6%	54.7%	47.9%
$50k – $100k	24.9%	30.8%	30.3%
$100k – $200k	7.2%	13.0%	17.6%
Over $200k	6.4%	1.5%	4.2%

Demographics & statistics

1,097

Population

People per sq mi

44.9

Median age

$46,250

Median household income

$22,667

Per capita income

$83,000

Median home value

$628

Median monthly rent

87.9%

Home ownership

11.6%

Poverty rate

7.7%

Unemployment

605

Housing units

9.2%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	263	24.0%
18 and over	834	76.0%
65 and over	172	15.7%
Median age	44.9 years

Race & ethnicity

White 99.2%

Two or more races 0.8%

Group	Count	%
White	1,088	99.2%
Two or more races	9	0.8%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	61.6%	54.7%	47.9%
$50k – $100k	24.9%	30.8%	30.3%
$100k – $200k	7.2%	13.0%	17.6%
Over $200k	6.4%	1.5%	4.2%

Under $10k 4.7%

$10k–$15k 3.4%

$15k–$25k 18.2%

$25k–$35k 6.9%

$35k–$50k 18.5%

$50k–$75k 24.1%

$75k–$100k 7.9%

$100k–$150k 6.9%

$150k–$200k 9.4%

Range	% of households
Under $10k	4.7%
$10k–$15k	3.4%
$15k–$25k	18.2%
$25k–$35k	6.9%
$35k–$50k	18.5%
$50k–$75k	24.1%
$75k–$100k	7.9%
$100k–$150k	6.9%
$150k–$200k	9.4%
Median income	$46,250

Housing

Home values

Under $50k 29.1%

$50k–$100k 25.8%

$100k–$150k 15.1%

$150k–$200k 4.5%

$200k–$300k 19.0%

$300k–$500k 4.5%

$1M+ 2.0%

Housing overview

Metric	Value
Median home value	$83,000
Median rent / month	$628
Owner occupied	87.9%
Renter occupied	12.1%
Vacant	37.9%
Single-family detached	74.5%
Large apartment buildings	0.0%
Mobile homes	24.2%
Median rooms	5.6
Avg household size (owned)	2.71

Year built

Era	%
2020 or later	2.3%
2010–2019	11.0%
2000–2009	11.2%
1990–1999	22.0%
1980–1989	9.0%
1970–1979	8.0%
1960–1969	11.6%
1950–1959	4.7%
1940–1949	2.0%
1939 or earlier	18.2%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	8.6%
2 bedrooms	22.2%
3 bedrooms	59.2%
4 bedrooms	4.4%
5+ bedrooms	5.7%

Vehicles per household

Vehicles	% of households
No vehicle	3.4%
1 vehicle	26.1%
2 vehicles	33.3%
3 or more	37.2%

Heating fuel

Fuel type	%
Electricity	54.4%
Propane / LP gas	16.3%
Wood	29.3%

Households & families

Household type	Count	%
Married-couple family	287	70.7%
Cohabiting couple	27	6.7%
Male householder, no spouse	46	11.3%
Female householder, no spouse	46	11.3%
Households with children under 18	131	32.3%
Households with seniors (65+)	129	31.8%
Average household size	2.70

Marital status

Status	Male	Female
Never married	28.1%	9.4%
Married	60.1%	76.8%
Separated	0.0%	0.0%
Widowed	1.2%	4.6%
Divorced	10.6%	9.2%

Education

Less than 9th grade 11.6%

Some HS, no diploma 8.7%

HS graduate 53.6%

Some college, no degree 10.3%

Associate's degree 6.6%

Bachelor's degree 6.6%

Graduate / professional 2.6%

Metric	%
HS diploma or higher	79.7%
Bachelor's or higher	9.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	27	12.9%
Kindergarten	0	0.0%
Elementary school	85	40.5%
High school	46	21.9%
College / grad school	52	24.8%

Employment

Industry of employment

Manufacturing 32.8%

Education & healthcare 18.1%

Construction 15.0%

Retail trade 10.4%

Agriculture & mining 8.9%

Professional & management 7.1%

Other services 2.3%

Public administration 2.0%

Transportation & utilities 1.8%

Finance & real estate 1.5%

Occupation

Category	%
Management, business & arts	22.9%
Service	10.4%
Sales & office	9.9%
Natural resources & construction	19.1%
Production & transportation	37.7%

Employment type

Type	%
Private sector	81.4%
Government	7.9%
Self-employed	10.7%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	71.8%
Carpool	12.2%
Public transit	0.0%
Walk	0.0%
Work from home	16.0%
Other means	0.0%
Avg commute (minutes)	27.3

Poverty

All people 11.6%

Under 18 years 8.4%

18 and over 12.6%

Married-couple families 9.8%

Female-led households 0.0%

Income support

Source	% of households
Social Security	57.9%
Retirement income	40.4%
Supplemental Security	12.3%
Cash public assistance	0.0%
Food stamps / SNAP	13.5%

Health indicators

Condition	%
Obesity	40.7%
High blood pressure	42.7%
High cholesterol	36.7%
Diabetes	13.4%
Heart disease	8.2%
Stroke	4.0%
Asthma	12.1%
Arthritis	33.6%
Kidney disease	3.4%
Pulmonary disease	12.9%
Cancer	6.4%

Behavior / access	%
Smoking	29.2%
Binge drinking	14.9%
No physical activity	36.0%
Less than 7 hrs sleep	40.5%
Depression	27.5%
Fair or poor health	24.9%
Poor mental health	19.8%
Poor physical health	16.8%
No health insurance	12.2%
Visited doctor (checkup)	75.7%
Visited dentist	48.0%
Cholesterol screening	88.6%
Teeth loss	23.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	35	4.2%

Disability	%
Any disability	30.2%
Under 18	14.1%
18–64 years	33.5%
65 and over	41.9%

Health insurance coverage

Type	%
Private insurance	62.5%
Public insurance	45.9%
No insurance	5.7%
Uninsured under 19	1.5%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	959	87.4%
Spanish	14	1.5%
Other Indo-European	7	0.7%
Asian & Pacific Islander	7	0.7%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,097	100.0%
Born in same state	1,097	100.0%
Born in different state	873	79.6%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Arab	184	16.8%
Italian	112	10.2%

Ancestry	Count	%
French	38	3.5%
Polish	15	1.4%

Technology access

Metric	% of households
Computer access	37.0%
Internet access	78.3%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 40328

What city is ZIP code 40328 in?

ZIP code 40328 is primarily assigned to Gravel Switch, Kentucky.

What county is ZIP code 40328 in?

ZIP code 40328 falls within Marion County, Kentucky.

Does ZIP code 40328 have a large retiree population?

58% of households in ZIP code 40328 receive Social Security income, suggesting a significant retiree or disability population.

How educated is the population of ZIP code 40328?

9% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

Is ZIP code 40328 mostly owner-occupied?

88% of occupied units in ZIP code 40328 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 40328?

The median home value in ZIP code 40328 is $83,000.

What timezone is ZIP code 40328 in?

ZIP code 40328 observes the EST timezone.