Butterworth Outer Ring Road (BORR) is a coastal expressway located in Butterworth, Penang, Malaysia. This 14 km (8.7 mi) expressway connects Sungai Dua in the north until Perai in the south.

Butterworth is the city centre of Seberang Perai in the Malaysian state of Penang. It lies about 3 km (1.9 mi) east of George Town, the capital city of Penang, across the Penang Strait. As of 2020, Butterworth had a total population of 80,378 residents.