Route 555 is a 11.8-kilometre (7.3 mi) long east–west secondary highway in the western portion of New Brunswick, Canada.

The route starts at Route 103 (Houlton Road) in Woodstock east of Trans-Canada Highway exit 188.

The road travels west passing Southern Carleton Elementary School in Bedell, and then passes through Campbell Settlement and Richmond Corner before crossing Route 540.

The last stretch of the highway passes by Irish Settlement before ending at Route 95 near the Houlton–Woodstock Border Crossing.

Here, Route 95 continues into Maine as Interstate 95.