Congressional Avenue (Filipino: Abenida Kongresyonal) is a 6-kilometer (3.7 mi) six-lane highway in Quezon City, Philippines.

Part of it is designated as part of Circumferential Road 5 (C-5) of the Manila arterial road system and National Route 129 (N129) of the Philippine highway system.

The extension segment, east of the intersection with Visayas Avenue, is characterized by partial access control, where at-grade intersections are replaced by U-turn slots.

According to the 1949 Plan of Quezon City, Congressional Avenue was supposed to connect to the National Government Center at Constitution Hills (present-day Batasan Hills),[2] which would house government offices, including the Congress, from which its name is apparently derived.

However, this plan was partially materialized as the road did not reach that area.