U.S. postal lookup

U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

42,735 verified records
All states and U.S. territories
Maps and coordinates
City lookup

ZIP Code Details for Louisville

Detailed geographic and postal record lookup for the city of Louisville.

Postal Information

ZIP Code 40229
Type Standard
Primary City Louisville
State KY
County Jefferson County
Acceptable Cities Okolona
Unacceptable -
Time Zone America/Kentucky/Louisville
Area Codes 502
Latitude 38,09° N
Longitude -85,65° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Louisville, KY

Postal Information

ZIP Code 40231
Type Po Box
Primary City Louisville
State KY
County Jefferson County
Acceptable Cities -
Unacceptable -
Time Zone America/Kentucky/Louisville
Area Codes 502
Latitude 38,2° N
Longitude -85,7° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Louisville, KY

Postal Information

ZIP Code 40232
Type Po Box
Primary City Louisville
State KY
County Jefferson County
Acceptable Cities -
Unacceptable -
Time Zone America/Kentucky/Louisville
Area Codes 502
Latitude 38,22° N
Longitude -85,74° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Louisville, KY

Postal Information

ZIP Code 40233
Type Po Box
Primary City Louisville
State KY
County Jefferson County
Acceptable Cities -
Unacceptable -
Time Zone America/Kentucky/Louisville
Area Codes 502
Latitude 38,22° N
Longitude -85,74° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Louisville, KY

Postal Information

ZIP Code 40241
Type Standard
Primary City Louisville
State KY
County Jefferson County
Acceptable Cities Barbourmeade, Broeck Pointe, Brownsboro Farm, Brwnsboro Frm, Creekside, Fincastle, Goose Creek, Green Spring, Hickory Hill, Hills And Dales, Hills Dales, Lyndon, Manor Creek, Spring Valley, Ten Broeck
Unacceptable -
Time Zone America/Kentucky/Louisville
Area Codes 502
Latitude 38,3° N
Longitude -85,58° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Louisville, KY

Postal Information

ZIP Code 40242
Type Standard
Primary City Louisville
State KY
County Jefferson County
Acceptable Cities Briarwood, Langdon Place, Lyndon, Meadow Vale, Murray Hill, Old Brownsboro Place, Old Brownsbro, Plantation, Rolling Hills
Unacceptable -
Time Zone America/Kentucky/Louisville
Area Codes 502
Latitude 38,28° N
Longitude -85,59° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Louisville, KY

Postal Information

ZIP Code 40243
Type Standard
Primary City Louisville
State KY
County Jefferson County
Acceptable Cities Douglass Hills, Douglass Hls, Middletown, Woodland Hills, Woodland Hls
Unacceptable -
Time Zone America/Kentucky/Louisville
Area Codes 502
Latitude 38,24° N
Longitude -85,54° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Louisville, KY

Postal Information

ZIP Code 40245
Type Standard
Primary City Louisville
State KY
County Jefferson County
Acceptable Cities Coldstream, Worthington Hills, Worthngtn Hls
Unacceptable -
Time Zone America/Kentucky/Louisville
Area Codes 502
Latitude 38,27° N
Longitude -85,45° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Louisville, KY

Postal Information

ZIP Code 40250
Type Po Box
Primary City Louisville
State KY
County Jefferson County
Acceptable Cities -
Unacceptable -
Time Zone America/Kentucky/Louisville
Area Codes 502
Latitude 38,22° N
Longitude -85,74° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Louisville, KY

Postal Information

ZIP Code 40251
Type Po Box
Primary City Louisville
State KY
County Jefferson County
Acceptable Cities -
Unacceptable -
Time Zone America/Kentucky/Louisville
Area Codes 502
Latitude 38,22° N
Longitude -85,74° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Louisville, KY

Page 4 of 8
Postal context

About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.