Residential electricity prices in 40257 in August 2026 averaged approximately 13.80 cents per kilowatthour (¢/kWh), which was about 24% less than the national average rate of 18.16 ¢/kWh (August 2026). [1]
→ Electricity rates listed as zero are not currently available.
See how electricity costs in 40257 differ from the average electricity costs for the U.S. overall. [1]
On a year-over-year basis - from July 2025 to July 2026 - residential electricity prices in 40257 increased approximately 6%, from 13.06 ¢/kWh to 13.81 ¢/kWh. [1]
→ Electricity rates listed as zero are not currently available.
Residential natural gas prices in 40257 in August 2026 averaged 37.05 dollars per thousand cubic feet ($/Mcf), which was approximately 37% more than the national average rate of 27.05 $/Mcf (August 2026). [2]
→ Natural gas prices listed as zero are not currently available.
See the chart below to see a comparison of Louisville natural gas prices against U.S. average prices. Compare 40257 (Louisville, KY) natural gas costs to overall U.S. average costs. [2]
On a year-over-year basis, residential natural gas prices in Louisville (Kentucky) increased approximately 6%, from 34.65 $/Mcf (July 2025) to 36.74 $/Mcf (July 2026). [2]
→ Natural gas prices listed as zero are not currently available.
Sorry, 40257 solar data is not currently available. Please check back later.
See the chart below for a comparison of Louisville solar radiation levels against other areas in the U.S. Compare Louisville levels against both 1) low average solar radition levels (WA) and also 2) high average solar radiation levels (NV). [3]
→ k/m/d: kilowatt hours per square meter per day.
→ Solar radiation values listed as zero are not currently available.
Households in the United States have benefited from falling energy prices in recent years, which has driven down the cost of living.
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Penn State researchers recently examined microgrids and discovered that they may not always be a wise economic move for communities.
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Through the analysis of publicly available data filed by electricity suppliers, the CT OCC discovered that electricity customers overpaid by $58 million in 2015.
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The ZIP code 40257 is associated with the city of Louisville, KY in Jefferson County. [4]
To learn more about utility rates & usage in 40257, or for other information related to utilities in Kentucky, visit the U.S. Energy Information Administration.
Edmund Becquerel, a 19-year-old French experimental physicist, discovered the basis of solar energy in 1839.
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