(For other uses, see Lynn (disambiguation).) Lynn is the largest city in Essex County, Massachusetts. Situated on the Atlantic Ocean, approximately 10 miles (16 km) north of downtown Boston, Lynn is part of the Boston metropolitan area's urban inner core. A former industrial center, Lynn was long colloquially referred to as the "City of Sin," owing to its historic reputation for crime and vice. Today, however, the city is known for its large international population, historic architecture, downtown cultural district, loft-style apartments, and public parks and open spaces, which include the oceanfront Lynn Shore Reservation; the 2,200-acre, Frederick Law Olmsted-designed Lynn Woods Reservation; and the High Rock Tower Reservation. The city also is home to the southernmost portion of the Essex Coastal Scenic Byway, Lynn Heritage State Park, and the National Register-listed Diamond Historic District.

Lynn is the largest city in the Essex County of the state of Massachusetts in the United States and is situated along the coast of Atlantic Ocean. Places of interest in Lynn are: Lynn Shore Reservation, a protected coastal area that has various beach and recreational activities for visitors; Lynn Shore Reservation, the largest municipal park in New England which houses many historical sites like Stone Tower, Steel Tower, the Wolf Pits, and Dungeon Rock; Lynn Heritage State Park, a history themed state park; High Rock Tower, an observation tower that offers great views of Nahant, Boston, Downtown Lynn, Egg Rock, and the Atlantic Ocean; Fraser Field, a baseball stadium; Manning Field, a football field; Lynn Memorial Auditorium, Mary Baker Eddy House, and Lucian Newhall House.