Roslyn is situated in the northern portion of Nassau County, bordered by Manhasset and Westbury. It is home to the Americana, one of the most famous shopping malls in the United States. Outdoor attractions in Roslyn include the highly-rated Harbor Links Golf Course, the Clark Botanical Garden and the scenic Sands Point Preserve. To the East, Roslyn is 80 minutes from the beaches, dining and entertainment options provided by the Hamptons.

The transit-oriented town is attractive to commuters, as it is proximate to numerous Long Island Rail Road stations and is a 50 minute train ride from Manhattan. Roslyn is approximately 25 and 30 minutes away from LaGuardia Airport and John F. Kennedy International Airport, respectively.