The County's public transit system, Putnam Area Rapid Transit (PART), is operated by MV Transportation and runs three fixed routes year-round in addition to a seasonal trolley in Cold Spring and a commuter shuttle to the Metro North Railroad Station at Croton Falls. PART routes 1, 2, and 5 operate on a flag-stop system, meaning the bus will serve riders anywhere along the route, boarding or departing. PART Paratransit is an origin-to-destination service that is complementary to the fixed routes for those Putnam residents who are unable to use the regular PART service due to disabilities. PART Paratransit operates specially modified vans to transport riders with a range of disabilities, including those who use wheelchairs.
As of May 12, 2025, a new On-Demand/Microtransit service, operated by Via Transportation, replaced PART Route 3. Half-Fare is available for the PART and On-Demand/Microtransit services to those who apply and meet the necessary requirements.