How is Puerto Rico divided?

Puerto Rico is divided into 78 municipalities. These municipalities, also known as ayuntamientos, are considered the primary subnational administrative units of Puerto Rico. The island's municipalities vary in size, population, and economic activities, but they all play a vital role in the governance and development of Puerto Rico.

Here are the names of all 78 municipalities of Puerto Rico:

1. Adjuntas

2. Aguada

3. Aguadilla

4. Aguas Buenas

5. Aibonito

6. Añasco

7. Arecibo

8. Arroyo

9. Barceloneta

10. Barranquitas

11. Bayamón

12. Cabo Rojo

13. Caguas

14. Camuy

15. Canóvanas

16. Carolina

17. Cataño

18. Cayey

19. Ceiba

20. Ciales

21. Cidra

22. Coamo

23. Comerío

24. Corozal

25. Culebra

26. Dorado

27. Fajardo

28. Florida

29. Guánica

30. Guayama

31. Guayanilla

32. Guaynabo

33. Gurabo

34. Hatillo

35. Hormigueros

36. Humacao

37. Isabela

38. Jayuya

39. Juana Díaz

40. Juncos

41. Lajas

42. Lares

43. Las Marías

44. Las Piedras

45. Loíza

46. Luquillo

47. Manatí

48. Maricao

49. Maunabo

50. Mayagüez

51. Moca

52. Morovis

53. Naguabo

54. Naranjito

55. Orocovis

56. Patillas

57. Peñuelas

58. Ponce

59. Quebradillas

60. Rincón

61. Río Grande

62. Sabana Grande

63. Salinas

64. San Germán

65. San Juan

66. San Lorenzo

67. San Sebastián

68. Santa Isabel

69. Toa Alta

70. Toa Baja

71. Trujillo Alto

72. Utuado

73. Vega Alta

74. Vega Baja

75. Vieques

76. Villalba

77. Yabucoa

78. Yauco

These municipalities are further subdivided into barrios and sectors. Barrios are the traditional rural divisions of Puerto Rico, while sectors are smaller subdivisions within urban areas. The municipalities of Puerto Rico are responsible for providing essential services such as public works, education, healthcare, and public safety to their residents.