Harford Transit, commonly known as Harford Transit LINK, Transit LINK, or simply LINK, is a public transportation service of the Harford County, Maryland Department of Transportation. It provides seven fixed route services in Harford County. The Maryland Transit Administration complements these routes, providing bus access to Baltimore with its commuter lines, or access to Baltimore or Washington via rail.

Harford Transit LINK operates seven routes Mondays through Fridays, closing on federal holidays and some adjacent days for holiday observances. Lines have various starting and stopping times, but none run overnight. The earliest route begins at 5:07 a.m. with the latest route closing at 8:57 p.m.