The Q58 and Q58 Limited are bus routes that constitute a public transit line operating primarily in Queens, New York City, with its southern terminal on the border with Brooklyn.

It ran south on Lawrence and Rodman Streets, and west on Horace Harding Boulevard to Corona, crossing the Flushing River at Strong's Causeway.

It then followed the right-of-way of the Myrtle El and former Lutheran Cemetery Surface Line to its own dedicated barn at the Ridgewood Depot, located at Palmetto Street underneath the Myrtle–Wyckoff Avenue elevated station.

[4][8][9][10][11][12] Due to using several different streets, including winding roads and many tight turns, the Q58 consistently ranks among the slowest bus routes in New York City, and has been cited for pedestrian safety issues.

[9][13] Short strips of the trolley tracks still exist in Ridgewood, at 60th Place and at Woodbine Street underneath the Myrtle El.

[3][16] The line began operation on June 20, 1896 as the Fresh Pond Road Line, running the same route except turning north at Junction Boulevard (then Junction Avenue) and Corona Avenue towards Bowery Bay (the current site of LaGuardia Airport).

[19] On June 30, 1949, the New York City Board of Estimate approved the full motorization of the line with buses.

[12] During the 1964 New York World's Fair, the B58 was rerouted to stop at the Rodman Street entrance of Flushing Meadows Park.

[23] Due to slow trips and high passenger load, limited-stop service was added to the route on September 12, 2010.

[26][27] As part of the redesign, the Q58 would have become a "intra-borough" route called the QT58, and it would be rerouted east of 108th Street to use Roosevelt Avenue rather than Horace Harding Expressway and College Point Boulevard.

[38] On January 29, 2025, the current plan was approved by the MTA Board, and the Queens Bus Redesign will go into effect by Labor Day.