Webster Avenue is a major north–south thoroughfare in the Bronx, New York City, United States. It stretches for 5.8 miles (9.3 km) from Melrose to Woodlawn (on the Bronx-Westchester borderline). The road starts at the intersection of Melrose Avenue, East 165th Street, Brook Avenue, and Park Avenue in the neighborhood of Melrose, ending at Nereid Avenue (East 238th Street) in the neighborhood of Woodlawn. There are no subway lines along this thoroughfare, unlike the streets it parallels—Jerome Avenue, The Grand Concourse, and White Plains Road, which all have subway lines (the IRT Jerome Avenue Line, IND Concourse Line, and IRT White Plains Road Line, respectively)—but until 1973, Webster Avenue north of Fordham Road was served by the Third Avenue Elevated, served by the 8 train.

Webster Avenue, which is wide for most of its length, begins as a continuation of Melrose Avenue at a large intersection with four roads including Melrose Avenue, East 165th Street, Brook Avenue, and Park Avenue. It begins in a northward direction, parallelling the Metro-North railroad tracks and Brook Avenue. After about 0.2 miles (0.32 km), East 167th Street intersects Webster Avenue and changes from a two-way road to one-way going westward. At Claremont Parkway, the still parallel Brook Avenue comes to an end, and Webster Avenue continues north. At 1.2 miles (1.9 km), the Cross Bronx Expressway passes over Webster Avenue. East Tremont Avenue (East 177th Street) intersects it soon afterward, in the eastern section of Tremont. Most of the southern half of Webster Avenue is concurrent with US 1.

Webster Avenue continues northerly by entering the eastern portion of the Fordham neighborhood. In Fordham, it forms a large intersection at Fordham Plaza with Decatur Avenue, East Fordham Road, and Third Avenue, across the street from Fordham University's Rose Hill campus. Decatur Avenue then parallels Webster Avenue on its west side as both roads continue north. Bedford Park Boulevard (East 200th Street) then intersects Webster Avenue in Bedford Park as it heads further north towards Woodlawn. Soon after the intersection with Bedford Park Boulevard (East 200th Street), Mosholu Parkway crosses over Webster Avenue, and then Gun Hill Road intersects it. Now parallel to the Bronx River Parkway, Webster Avenue then intersects with East 233rd Street, and finally ends at Nereid Avenue (East 238th Street) in northern Woodlawn, where it continues as Bronx River Road.

The Metro-North Railroad's Harlem Line has several stations along Webster Avenue: Fordham station at Fordham Road; Botanical Garden station at Bedford Park Boulevard; and Williams Bridge station at Gun Hill Road. Additionally, the New York City Subway’s IRT Jerome Avenue Line (4 train), IND Concourse Line (B and ​D trains), and IRT White Plains Road Line (2 and ​5 trains), serve the avenue.

The following New York City Bus routes serve Webster:

• The Bx41 and Bx41 SBS are the main buses, serving it south of East Gun Hill Road.
• The River Park Towers-bound Bx40 and Bx42 run from East 180th Street to East 178th Street.
• The Bx35 runs between East 167th and East 168th Streets.
• The Bx16 serves the avenue north of East 233rd Street.

On March 29, 1936, a trolley on Webster Avenue crashed into a new automobile at 209th Street. The crash hurt 20 people, 12 of whom were rushed to Fordham Hospital.

The entire route is in the New York City borough of the Bronx. 

Location	mi	km	Destinations	Notes
Melrose	0.0	0.0	East 165th Street / Melrose Avenue / Brook Avenue / Park Avenue	Continues south as Melrose Avenue
Tremont	1.2	1.9	I-95 south / US 1 south (Cross Bronx Expressway) – George Washington Bridge	US 1 continues south via Cross Bronx Expressway; exit 2B on I-95
	1.5	2.4	East Tremont Avenue
Belmont	2.6	4.2	US 1 north (East Fordham Road)	US 1 continues north via Fordham Road
Norwood	4.2	6.8	East Gun Hill Road
Woodlawn	5.4	8.7	East 233rd Street	To Bronx River Parkway north
	5.5	8.9	Bronx River Parkway south – Sound View Park	Exit 10 on Bronx Parkway
	5.8	9.3	Nereid Avenue / Bronx River Road north	Continuation into Yonkers
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Route transition

40°51′50.97″N 73°53′17.74″W / 40.8641583°N 73.8882611°W / 40.8641583; -73.8882611