Kollam Bypass is a part of NH 66 that bypasses CBD of Kollam city in Kerala, India. The busy 13.141 km long bypass starts at Mevaram in the south to Kavanad in the north, via Ayathil, Kallumthazham, Kadavoor and Kureepuzha in Kollam city. It is a joint venture between the central and state government. It was inaugurated on 15 January 2019 by Prime Minister Narendra Modi.

National Highway 66, commonly referred to as NH 66, is a mostly 4 lane 1640 km long busy National Highway that runs roughly north–south along the western coast of India, parallel to the Western Ghats. It connects Panvel, a city east of Mumbai to Cape Comorin (Kanyakumari), passing through the states of Maharashtra, Goa, Karnataka, Kerala and Tamil Nadu.