Kentucky law has no e-bike definition and no Class 1/2/3 system (KRS 189.010).
Minimum age
Checking with official source
Helmet rule
Checking with official source
Where you can ride
Bicycles may ride on sidewalks and crosswalks unless a law or local ordinance bans it, with a pedestrian's rights and duties (601 KAR 14:020). State parks, Lexington's Legacy Trail and the Louisville Loop: checking with official sources.
License / registration
No statewide license or registration rule for bicycles found (KRS 186.010).
County & city rules
Highlighted counties have local e-bike rules we've checked against an official source. Everywhere else, state law applies. Parks, trails and HOAs can still post their own rules.
No riding on sidewalks at 11+. Helmet under 18 in Metro parks and park roads (§74.07).
No sidewalk riding for anyone 11 or older anywhere in Louisville Metro, and no sidewalk riding at any age downtown (Downtown Form District), §74.02(A). Louisville Loop e-bike rules: checking with official sources.
Metro Code §74.01 defines an e-bike: working pedals, motor under 1,000 W, top motor-only speed under 20 mph.
Trails & paths
No sidewalk riding for anyone 11 or older anywhere in Louisville Metro, and no sidewalk riding at any age downtown (Downtown Form District), §74.02(A).
Age & helmet
No riding on sidewalks at 11+. Helmet under 18 in Metro parks and park roads (§74.07).
Also
Louisville Loop e-bike rules: checking with official sources.
ALL Electric