 New York State Route 27A | ||||
|---|---|---|---|---|
 Map of Long Island with NY 27A highlighted in red | ||||
| Route information | ||||
| Auxiliary route of NY 27 | ||||
| Maintained by NYSDOT and Nassau County | ||||
| Length | 17.31 mi[1] (27.86 km) | |||
| Existed | c. 1931[2][3]–present | |||
| Major junctions | ||||
| West end |  NY 27 in Massapequa | |||
 Robert Moses Causeway in West Islip Heckscher State Parkway in East Islip | ||||
| East end |  CR 85 in Oakdale | |||
| Location | ||||
| Country | United States | |||
| State | New York | |||
| Counties | Nassau, Suffolk | |||
| Highway system | ||||
| ||||
New York State Route 27A (NY 27A) is a state highway between Massapequa in Nassau County and Oakdale in Suffolk County, on Long Island, New York, in the United States. Its two most prominent components are Merrick Road and Montauk Highway.