Machine Learning Engineer Salary: Louisville, KY vs Boston, MA
BLS does not publish a separate estimate for Machine Learning Engineers. The figures on this page are the BLS OEWS May 2025 estimates for Data Scientists (15-2051), the closest published occupation.
Side-by-side comparison of wages and local price levels for Machine Learning Engineers in Louisville, KY and Boston, MA, based on BLS OEWS May 2025 wage data and BEA regional price parities for 2024.
1Which City Pays More?
Detailed Comparison
| Metric | Louisville, KY | Boston, MA | Diff |
|---|---|---|---|
| Median Annual Salary | $99,980 | $132,040▲ | -$32,060 |
| 25th Percentile | $79,350 | $102,720▲ | -$23,370 |
| 75th Percentile | $129,380 | $166,120▲ | -$36,740 |
| 90th Percentile | $164,110 | $206,220▲ | -$42,110 |
| Price Level (BEA 2024, US = 100) | 93.1 | 108.3 | -15.2 |
| Median at National-Average Prices | $107,420 | $121,959▲ | -$14,539 |
| Total Employment | 650 | 7,930 | -7,280 |
3Summary Analysis
On paper, Boston, MA pays $32,060 more (median: $99,980 vs $132,040). BEA's regional price parity is 93.1 in Louisville, KY and 108.3 in Boston, MA (United States = 100). At national-average prices the medians are $107,420 and $121,959, so Boston, MA comes out ahead once local prices are counted.
5Reading This Comparison
The $32,060 gap between the two medians is a gap in dollars, not in what those dollars buy. Dividing each median by its area's regional price parity restates it at national-average prices: $107,420 for Louisville and $121,959 for Boston, a difference of $14,539.
The price levels come from the U.S. Bureau of Economic Analysis, which describes them this way: “Regional price parities (RPPs) measure the differences in price levels across states and metropolitan areas for a given year and are expressed as a percentage of the overall national price level.” The figures used here are the all-items index for each whole metropolitan area (Louisville/Jefferson County, KY-IN; Boston-Cambridge-Newton, MA-NH) and cover prices only, not taxes.
BLS estimates 650 Machine Learning Engineer jobs in the Louisville area and 7,930 in the Boston area. For broader context, see our Kentucky overview and the full Machine Learning Engineer city ranking.
Frequently Asked Questions
Is Machine Learning Engineer salary higher in Louisville, KY or Boston, MA?
Boston, MA has the higher median wage for Machine Learning Engineers ($132,040 per year, against $99,980 in Louisville, KY; BLS OEWS May 2025). Restated at national-average prices using BEA regional price parities, the medians are $107,420 in Louisville, KY and $121,959 in Boston, MA.
How do prices compare between Louisville, KY and Boston, MA?
The U.S. Bureau of Economic Analysis puts the 2024 regional price parity at 93.1 for the Louisville/Jefferson County, KY-IN metropolitan area and 108.3 for the Boston-Cambridge-Newton, MA-NH metropolitan area, where the United States is 100. That is 6.9% below the national level for Louisville, KY and 8.3% above the national level for Boston, MA.
Which city pays Machine Learning Engineers more once local prices are counted?
Boston, MA: at national-average prices its median Machine Learning Engineer wage is $121,959, against $107,420 for Louisville, KY. The adjustment divides each median by the area's BEA regional price parity and covers prices only, not taxes.