is a municipality
of the state of Nayarit
. It is located in the extreme north of the state. The area of the municipality is 2,073 km² and the population was 32, 217 in 2005, showing a significant decrease from 1980 when it was 34,695. Most
of the population is still rural with the major settlements being Rosamorada with 3,393 inhabitants; San Vicente with 4,556; Los Pericos with 2,441; Chilapa with 2,277; Pimientillo with 1,824 and El Tamarindo with 1,544.
Rosamorada takes its name from the existence of a leafy tree of purple flowers called "clavellina" once found in the center of the town.
The economy is primarily agricultural with the main crops being beans, chile, rice, melons, and watermelon. There is also significant fishing and shrimp raising in the lagoons adjacent to the Pacific Ocean.
The western part of the municipality is composed of mangrove swamps with several large freshwater lagoons formed by the Bejuco, San Juan and San Pedro rivers, the latter being the southern boundary with the municipalities of El Nayar, Ruíz, and Tuxpan. The eastern part of the municipality consists of foothills gradually climbing to the Sierra Madre Occidental. For a detailed map see