Kentucky USDA Rural Housing Mortgage Lender: Kentucky Rural Housing USDA Maximum Income by Coun... : 2020 Kentucky USDA Loan Income Limits for Kentucky Counties Kentucky USDA loan income limits vary by location and household size wi... The base USDA income limits are for most Kentucky counties below: New Income limits for most counties (*) in Kentucky are $90,300 for a household family of four and household families of five or more can make up to $119,200. With the new changes for 2020 USDA Income limits, the Jefferson County Louisville, KY Metro area (**) saw an increase of $90,300 for a family of four and up to $119,200 for a family of five or more. The metro area surrounding counties of Jefferson County includes Oldham, Bullitt, Spencer are included in these higher income limits for USDA loans. Remember, the entire Jefferson County and Fayette County Kentucky counties are not eligible for USDA loans. Along...