MetroBus is a public bus service operated by Metro Transit that serves the Greater St. Louis area. In , the service had an annual ridership of , or about per weekday as of .

Service MetroBus currently operates 58 fixed bus routes in a shared fare system with MetroLink. Of its 58 bus routes, 44 of them operate in St. Louis City and County in Missouri with 14 routes in St. Clair County, Illinois. In September 2019, as part of Metro Reimagined, Metro restructured Missouri bus routes to add increased frequency on busy routes but discontinued six low ridership routes. That same year, Metro also removed or relocated more than 360 of the system's 5,400 bus stops.

In June 2021, Metro introduced the region's first electric buses including 40-foot and 60-foot articulated models. The 60-foot articulated buses are used exclusively on the #70 Grand bus line, the region's busiest.

Beginning with the COVID-19 pandemic in 2020, MetroBus has seen a sharp decline in ridership and it's estimated that full recovery could take several years. In addition, ongoing labor shortages have reduced Metro's ability to offer comprehensive service to its riders. In June 2023, weekend service was reduced on 26 routes and suspended on 4 others. In an effort to recruit more drivers, Bi-State's board signed a contract in August 2023 with Amalgamated Transit Union Local 788, which approved a salary increase for each of the next two fiscal years and a $5,000 signing bonus. However, recruitment remains low and Metro slashed the number of full-time bus driver slots in its 2024 budget by 21%, from 811 to 635.

In 2024, after several successful hiring events, Metro increased frequency on 17 bus routes in Missouri as part of its January service adjustment. At the time of the adjustment, driver ranks had increased to 618, up from 556 in November 2023. By the end of 2024, Metro had increased its operator ranks to 673 allowing it to increase frequency or add service on 35 Missouri and 7 Illinois routes, including the addition of four new routes.

Routes Missouri

No. Name Notes 1 Gold Route operates between the Central West End and Mallinckrodt transit centers. This route was originally operated by Washington University as a shuttle service between their medical and Hilltop campuses. Operations were handed over to Metro in 2006. 2 Red Route operates between the Rock Road and Brentwood I-64 transit centers. Intermediate stops include the Delmar Loop, Skinker and Mallinckrodt transit centers. This route was originally operated by Washington University as a shuttle service between their campuses and other locations. Operations were handed over to Metro in 2006. 4 Natural Bridge Route operates primarily along Natural Bridge Avenue between the North Hanley and Civic Center transit centers with an intermediate stop at UMSL–South. 5 Green Route operated as part of a contract with Washington University. It begins and ends at the Mallinckrodt Transit Center with intermediate stops at the Skinker and University City–Big Bend MetroLink stations. 8 Shaw-Cherokee Route operates between the Central West End and Catalan transit centers. Generally follows Taylor, Chouteau, Tower Grove, Shaw, Grand Boulevard, Cherokee, Jefferson, and South Broadway. 9 Oakville Route operates between the Shrewsbury Transit Center and Telegraph and Baumgartner in Oakville. Generally follows River de Peres Boulevard, Germania/Marceau, Broadway, and Telegraph. Jefferson Baracks is an intermediate destination. 10 Gravois-Lindell Route operates between the Central West End and Gravois–Hampton transit centers. The northern half of the route generally follows Olive/Lindell to the Civic Center Transit Center while the southern half follows Gravois to Hampton. 11 Chippewa Route operates between the Civic Center and Shrewsbury transit centers. Generally follows Chouteau, South Jefferson, Chippewa, and Lansdowne. 13 Union Route operates along Taylor, Lindell, and Union between the Central West End Transit Center and Union and West Florissant in North St. Louis. 16 City Limits Route operates between the Riverview and Shrewsbury transit centers. Generally follows Jennings Station Road, Skinker/Kienlen, Jamieson Avenue and Lansdowne Avenue. 18 Taylor Route operates along Taylor, Newstead, and Pope between the Central West End Transit Center and O'Fallon Park. 19 St. Louis Ave Route operates between the Civic Center and Rock Road transit centers. Generally follows Tucker Boulevard, 13th Street, St. Louis Avenue, and St. Charles Rock Road. 21 Watson Road Route operates between the Shrewsbury Transit Center and St. Louis Community College–Meramec. Generally follows Watson Road, Kirkwood Road (Lindbergh Boulevard) and Big Bend Boulevard. 30 Arsenal Route operates between the Civic Center and Shrewsbury transit centers. Generally follows Chouteau, South Broadway, Arsenal, Watson, and Chippewa. Does not service the National Geospatial–Intelligence Agency during snow events. 31 Chouteau Route operates between the Civic Center Transit Center and the Maplewood Commons shopping center. Generally follows Chouteau and Manchester to Hanley Road. Makes an intermediate stop at the Maplewood–Manchester Transit Center. 32 M.L. King Route operates between the Civic Center and Rock Road transit centers. Generally follows 14th Street, Olive Street, Tucker Boulevard, Cole Street, Cass Avenue, and Dr. Martin Luther King Drive. 33 Midland Route operates along Dorsett and Midland roads between the Clayton Transit Center and Westport Plaza. 34 Earth City Route operates along Interstate 70 and Route 141 (Earth City Expressway) between the North Hanley Transit Center and the Riverport business parks. 35 Rock Road Route operates along St. Charles Rock Road between the Rock Road Transit Center and DePaul Medical Center. 40 Broadway-Halls Ferry Route operates between the North County and Civic Center transit centers. Runs primarily along Broadway north of Olive Street and Halls Ferry north of the Riverview Transit Center. In downtown St. Louis, the route is coupled on Locust and Olive streets between 14th Street and Broadway. 41 Lee Route operates primarily along Riverview Boulevard, Lee Avenue, and 20th Street between the Riverview and Civic Center transit centers. During snow events the route changes to West Florissant Avenue and Union Boulevard. 42 Sarah Route operates primarily along Sarah Street in North St. Louis between the Central West Transit Center and O'Fallon Park. 49 Lindbergh Route operates between the North Hanley Transit Center and South County Mall. Generally follows Lindbergh Boulevard and Natural Bridge Avenue. 56 Kirkwood-Webster Route operates between the Shrewsbury Transit Center and St. Louis Community College–Meramec. Generally follows Big Bend Boulevard, Berry Road, and Lockwood Avenue. 57 Manchester Route operates primarily along Manchester Road between the Maplewood Transit Center and Wildwood Town Center. Limited service is provided to St. Louis Community College–Wildwood. 58 Chesterfield Valley Route operates between the Clayton Transit Center and the Chesterfield Valley. Generally follows Interstate 64 with intermediate stops at the Ballas Transit Center, Missouri Baptist Medical Center, and Chesterfield shopping centers. 59 Oakland Route operates between the Central West End Transit Center and Highland Terrace at St. Mary's Hospital. Generally follows Oakland and Clayton avenues. 60 Shepley-Lilac Route begins at the Riverview Transit Center and operates primarily along Chambers Road and Lilac Avenue serving destinations in Glasgow Village. 61 Chambers Route operates between the North Hanley and Riverview transit centers. Generally follows Hanley Road, Airport/Chambers Road, and Bellefontaine Road. 64 Lucas Hunt Route operates primarily along Lucas-Hunt and Halls Ferry roads between the Rock Road and Riverview transit centers. 70 Grand Route operates almost entirely along Grand Boulevard between the North Broadway Transit Center and Loughborough Commons. This is Metro's busiest bus route and is operated with 60-foot, battery electric articulated buses. 73 Carondelet Route operates between the Civic Center Transit Center and South County Mall. Generally follows 12th Street, South Broadway, Virginia and Michigan avenues, and Lemay Ferry Road. 74 Florissant Route operates primarily along West and North Florissant avenues between the North County and Civic Center transit centers. Limited service is provided to St. Louis Community College–Florissant Valley. 76 North Hanley Shuttle Route originates at the North County Transit Center. Serves various industrial parks near St. Louis Lambert International Airport and other destinations in Florissant and Hazelwood. 77 Village Square Route operates primarily along Hanley Road, Dunn Road, Lindbergh Boulevard, and New Halls Ferry Road between the North County and North Hanley transit centers. 78 Bellefontaine Route operates between the North County and Riverview transit centers. Generally follows New Halls Ferry Road, Parker Road, and Bellefontaine Road and serves Christian Hospital Northeast and the National Personnel Records Center. 79 Ferguson-Clayton Route operates between the Clayton and North County transit centers, primarily on Hanley Road, Florissant Road, Dunn Road, and Pershall Road. Makes an intermediate stop at the North Hanley Transit Center. 90 Hampton Route operates primarily on Goodfellow Boulevard and DeBaliviere Avenue in North St. Louis and Hampton Avenue and Germania/Marceau avenues In South St. Louis. This route also serves attractions in Forest Park. 91 Olive Route operates along Olive Boulevard between the Delmar Transit Center and Chesterfield Village. 94 Page Route operates along Page between the Civic Center Transit Center and Westport Plaza. Intermediate stops include the Wellston Transit Center. 95 Kingshighway Route operates primarily along Kingshighway Boulevard between the North Broadway and Gravois–Hampton transit centers. Intermediate stops include the Central West End Transit Center and Barnes-Jewish Hospital. 97 Delmar Route operates primarily along Delmar Boulevard between the Civic Center and Clayton transit centers with an intermediate stop at the Delmar Loop Transit Center. 98 Ballas-North Hanley Route operates between the North Hanley and Ballas transit centers. Generally follows New Ballas Road where it serves both Mercy and Missouri Baptist medical centers and then continues along interstates 270 and 70. 100 Hazelwood Route operates between the North Hanley Transit Center and several business and industrial parks around Hazelwood.

Illinois