Harbor Transit (officially, the Harbor Transit Multi-Modal Transportation System) is the primary bus agency providing intra- and inter-city public transportation service for the Ferrysburg–Grand Haven–Spring Lake tri-cities region in northwestern Ottawa County, Michigan, which is considered part of the Grand Rapids metropolitan area.

The primary year-round service is demand-responsive point-to-point transportation; in addition, Harbor Transit operates two seasonal deviated routes (the Lakeshore Trolley and Beach Express) during the summer.

[5] Harbor Transit operates two seasonal deviated routes serving the Grand Haven City Beach in addition to its primary dial-a-ride service.

The Lakeshore Trolley travels through historic Grand Haven,[6] while the Beach Express provides park-and-ride service from three large parking lots.

[7] For point-to-point travel, adult fares for service scheduled the same day are US$2.50, discounted to half price ($1.25) for qualified individuals (youths, seniors, and disabled).