Suffolk County Transit began as the consolidation of numerous private bus companies, many of which became contractors for the county. These included the Bornscheuer Bus Company which served Amityville, Copiague, Lindenhurst, West Babylon, and Babylon. Affiliated company EBT, Inc. (an affiliate of School Bus Company Educational Bus Transportation, Incorporated), continues in existence under contract with Suffolk County Transit. In Central Suffolk, the
East Patchogue-based Louis A. Fuoco Bus Line (1962–1992) served Patchogue, East Patchogue, Hagerman, Bellport, South Haven, Mastic, Mastic Beach, Port Jefferson, Medford, Coram, Ridge, Calverton, and Riverhead. Continued to exist during early years of Suffolk County Transit. Also, Coram Bus Service (1958–1992) primarily operated school buses, but also began serving mass transit routes in the Town of Brookhaven towards locations as far west as Commack and East Northport, and as far east as Riverhead. On the North Shore, Huntington Coach Corporation (1927–present) served Huntington, Farmingdale, Melville, and Halesite. Quinn's Bus Lines, and later Coram Bus Service after the two were merged in 1969, mainly served the area between Port Jefferson and Wading River; especially after the demise of the
Wading River Extension of the
Port Jefferson Branch. In the western Town of Islip, Suffolk Bus Corporation (1946–present), which served Bay Shore, Brentwood, West Brentwood, Central Islip, Islip, and Babylon, continues in existence under contract with Suffolk County Transit. On the east end, Sunrise Coach Lines (1946–present), which served Greenport, Riverhead, Southampton, Sag Harbor, and East Hampton, began operations in 1946, continued in existence under contract with joint venture Twin Forks Transit for the routes they originally operated for Suffolk County Transit. In 2006 Sunrise Coaches EXPRESS Routes were bought by
Hampton Jitney. As of October 29, 2023, the Twin Forks Joint Venture has been discontinued as it is no longer needed due to the discontinuation of the S92, which was co-operated by Sunrise and Hampton Jitney. Utility Lines, a
Bee Line Incorporated subsidiary, ran from Patchogue along Montauk Highway, thence Merrick Road into Nassau County. This line was merged into the
Metropolitan Suburban Bus Authority in 1973, but funding and service disputes lead to the splitting of that route between the N19 west of Babylon and S40 east of Babylon. Inter-County Motor Coach Incorporated, which is still based in the
Village of Babylon has been operating since 1922. Affiliated companies included Babylon Transit operating from 1937 until around 1986, and Lindenhurst Bus Company, which operated from 1952 to 1986, both companies running in their final years under contract with Suffolk County Transit. Alert Coach, an affiliate of Baumann & Sons Buses, Incorporated, and Acme Bus Corporation began on November 30, 1966, and had at least four lines within the county, which included a troubled history with the Suffolk portion of the old Utility Lines bus. During his tenure as Suffolk County executive,
Steve Levy proposed a takeover of Suffolk County Transit by the
MTA. In 2011, the Suffolk County Legislature authorized a fare hike from $1.50 to $2.00 on the S92 and 10C routes only. In return, service on those two routes was expanded to Sunday during the summer months. The fare hike took place on June 17, 2011, with Sunday service operating from July until September. In 2023, Suffolk County Transit released their redesign plan for routes. This redesign was supposed to go into effect on October 1, 2023, but was postponed until October 29, 2023. Because of this,
NICE bus made a change to weekend service on the bus route in September 2023 (and now daily as of summer 2024) to provide a connection to the timed transfer point at Amityville from the Sunrise Mall in Nassau County, where both the n71 and S20 (now route 2) previously terminated. As of October 29, 2023, the New Suffolk County Transit Redesign has taken effect, with the new routes outlined below and new maps and schedules posted on the website at sctbus.org, with all routes no longer being designated with an "S". ==Fare==