The San Juan Police Department is the primary law enforcement agency for the city of San Juan, PR, with jurisdiction only in the city limits of San Juan. It is also the largest municipal police force in the commonwealth, and the second largest of any police force in the commonwealth, after the Puerto Rico Police Department. It was created in 1977 under law #19 of May 12, 1977, known as the Municipal Police Law creating local police forces in each city of Puerto Rico.