San Sebastián is a municipality of Puerto Rico located northwest of the island, south of Isabela and Quebradillas; north of Las Marías; east of Moca and Añasco; and west of Lares. San Sebastián is spread over twenty-four wards and San Sebastián Pueblo (The downtown area and the administrative center of the city). It is a principal city of the Aguadilla-Isabela-San Sebastián Metropolitan Statistical Area.

Tourism 

Landmarks and places of interest: 

• Doña Bisa Cabrero House - Facing the Public Square
• Guajataca Lake
• Luis Aymat Cardona Coliseum
• Market Plaza
• Church San Sebastian Martir of San Sebastian
• Robles Waterfall (also known as Gozalandia).
• Collazo Waterfall
• Sombrero Hill
• Hacienda El Jibarito
• Juan Jose "Titi" Beniquez Stadium
• Luis Munoz Marin Ground
• Guajataca Scout Reservation
• Blue Moon Bar

San Sebastian is the hometown of musician and composer Angel Mislan who is best known by his danza compositions, "Sara" and "Tu y Yo" (You and I).

Festivals and events

• Patronal Religious Fiesta - January
• Three Kings Festival - January
• Heifer Festival (Festival de la Novilla) - January
• Chess Tournament - January
• Ateneo Pepiniano Cultural Festival - January
• Hammock Festival - July
• Comeback to the Mountaintop - September