Western Terminus: Merrick Boulevard at the Queens-Nassau border
Eastern Terminus: NY 27A and County Line Road (Suffolk CR 1) at the Nassau-Suffolk border
Distance: 16.76 miles
Merrick Road begins at the Queens-Nassau border where Merrick Boulevard ends. It runs to the east. In Rockville Centre, it crosses Sunrise Highway (NY 27). From this point east, it is the southernmost east/west route in Nassau County. Just west of the Nassau-Suffolk border, it intersects Carman Mill Road (NY 27A) and takes on the NY 27A designation. When Merrick Road crosses the Nassau-Suffolk border, CR 27 ends. Many years ago, the entirety of Merrick Road used to be designated NY 27A.