ZIP Code Tabulation Area · Kentucky

ZIP Code 40031: Oldham County, KY

ZIP Code 40031 (Oldham County, Kentucky) has an estimated 26,259 residents in 8,232 households. The median household income is $98,513, the median home value is $341,000 and the median gross rent is $1,092/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated Oct 26, 2026

Total population

26,259

Margin of error ±930

Median household income

$98,513

Margin of error ±$7,738

Median home value

$341,000

Margin of error ±$14,225

Median gross rent

$1,092/mo

Margin of error ±$73

Median age

39.4 yrs

Margin of error ±1.3 yrs

Mean travel time to work

25.2 min

Margin of error ±2.4 min

How ZIP 40031 compares with Kentucky and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 4003139.4 yrsKentucky39.1 yrsUnited States38.9 yrs

Median household income

ZIP 40031$98,513Kentucky$63,726United States$80,734

Per capita income

ZIP 40031$38,010Kentucky$35,821United States$44,673

Poverty rate

ZIP 400316.8%Kentucky16.1%United States12.5%

Unemployment rate

ZIP 400313.0%Kentucky4.9%United States5.2%

Bachelor's degree or higher

ZIP 4003134.7%Kentucky27.6%United States35.7%

Median home value

ZIP 40031$341,000Kentucky$205,600United States$332,700

Median gross rent

ZIP 40031$1,092/moKentucky$967/moUnited States$1,413/mo

Owner-occupied homes

ZIP 4003182.0%Kentucky68.3%United States65.2%

Mean travel time to work

ZIP 4003125.2 minKentucky24.0 minUnited States26.4 min

Worked from home

ZIP 4003114.0%Kentucky10.2%United States15.1%

All figures for ZIP 40031

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 40031 — ACS 2020–2024 5-year estimates
Measure	ZIP 40031	Margin of error	Kentucky	United States
Total population	26,259	±930	4,534,824	334,922,499
Median age	39.4 yrs	±1.3 yrs	39.1 yrs	38.9 yrs
Households	8,232	±343	1,814,469	129,227,496
Median household income	$98,513	±$7,738	$63,726	$80,734
Per capita income	$38,010	±$2,262	$35,821	$44,673
Poverty rate	6.8%	±1.8 pts	16.1%	12.5%
Unemployment rate	3.0%	±1.1 pts	4.9%	5.2%
Bachelor's degree or higher	34.7%	±2.7 pts	27.6%	35.7%
Median home value	$341,000	±$14,225	$205,600	$332,700
Median gross rent	$1,092/mo	±$73	$967/mo	$1,413/mo
Owner-occupied homes	82.0%	±2.5 pts	68.3%	65.2%
Mean travel time to work	25.2 min	±2.4 min	24.0 min	26.4 min
Worked from home	14.0%	±2.6 pts	10.2%	15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 40031
Group	ZIP 40031	Kentucky	United States
White alone, not Hispanic or Latino	83.5%	81.5%	57.4%
Black or African American alone, not Hispanic or Latino	4.6%	7.6%	11.9%
American Indian and Alaska Native alone, not Hispanic or Latino	0.1%	0.1%	0.5%
Asian alone, not Hispanic or Latino	0.8%	1.6%	5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino	0.0%	0.1%	0.2%
Some other race alone, not Hispanic or Latino	0.4%	0.3%	0.6%
Two or more races, not Hispanic or Latino	3.8%	3.9%	4.3%
Hispanic or Latino (of any race)	6.8%	5.0%	19.3%

Where ZIP 40031 is

State: Kentucky
Main county: Oldham County— also overlaps Henry County
Largest overlapping place: La Grange (11% of the ZIP's land area)
Land area: 66.89 sq mi· about 393 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Oldham County

40010 Buckner, KY 40014 Oldham County, KY 40026 Oldham County, KY 40056 Pewee Valley, KY 40059 Louisville/Jefferson County, KY 40077 Oldham County, KY

See every ZIP code in Kentucky, or compare ZIP 40031 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.