Route 27 moves through downtown Princeton, passing by the main gates to Princeton University near Nassau Hall, and intersecting County Route 571 (Washington Road, also signed as County Route 526).
New Jersey | Newark, New Jersey | Princeton, New Jersey | Jersey | Atlantic City, New Jersey | Hoboken, New Jersey | Jersey City, New Jersey | Governor of New Jersey | New Jersey General Assembly | Trenton, New Jersey | New Jersey Senate | New Jersey Devils | U.S. Route 66 | New Brunswick, New Jersey | Paterson, New Jersey | Morristown, New Jersey | U.S. Route 1 | Passaic, New Jersey | New Jersey Legislature | New Jersey gubernatorial election, 2009 | Madison, New Jersey | U.S. Route 6 | U.S. Route 101 | Montclair, New Jersey | Fort Lee, New Jersey | Route 66 | New Jersey Turnpike | Jersey City | Camden, New Jersey | U.S. Route 30 |
Its western terminus is at U.S. Route 22 in Bridgewater Township, Somerset County while its eastern terminus is at Route 27 in Elizabeth, Union County.