| | City | Population |
| 1. | San Jose | 335,007 |
| 2. | Puerto Limon | 63,081 |
| 3. | San Francisco | 55,923 |
| 4. | Alajuela | 47,494 |
| 5. | Liberia | 45,380 |
| 6. | Paraiso | 39,702 |
| 7. | Puntarenas | 35,650 |
| 8. | San Isidro | 34,877 |
| 9. | Curridabat | 34,586 |
| 10. | San Vicente | 34,447 |
| 11. | San Vicente de Moravia | 34,447 |
| 12. | San Jose | 31,430 |
| 13. | Purral | 30,034 |
| 14. | Turrialba | 28,955 |
| 15. | San Miguel | 28,827 |
| 16. | San Pedro | 27,477 |
| 17. | San Rafael Abajo | 27,419 |
| 18. | Quesada | 27,310 |
| 19. | Ipis | 26,669 |
| 20. | Cartago | 26,594 |
| 21. | Chacarita | 26,354 |
| 22. | San Juan | 26,047 |
| 23. | Mercedes | 26,007 |
| 24. | Guadalupe | 26,005 |
| 25. | Aserri | 25,874 |
| 26. | San Rafael | 25,410 |
| 27. | San Felipe | 24,985 |
| 28. | Patarra | 23,983 |
| 29. | Tejar | 22,433 |
| 30. | Heredia | 21,947 |
| 31. | San Pablo | 21,662 |
| 32. | Calle Blancos | 20,710 |
| 33. | Canas | 20,306 |
| 34. | Guapiles | 19,092 |
| 35. | Siquirres | 18,231 |
| 36. | San Rafael | 17,649 |
| 37. | San Diego | 16,991 |
| 38. | Colima | 15,875 |
| 39. | Esparza | 15,575 |
| 40. | San Juan de Dios | 15,469 |
| 41. | Nicoya | 15,313 |
| 42. | San Rafael Arriba | 15,051 |
| 43. | Desamparados | 14,448 |
| 44. | Concepcion | 14,000 |
| 45. | Alajuelita | 13,845 |
| 46. | Sabanilla | 13,251 |
| 47. | Granadilla | 12,683 |
| 48. | Santa Cruz | 12,281 |
| 49. | San Josecito | 12,195 |
| 50. | Escazu | 12,071 |
| 51. | Naranjo | 11,853 |
| 52. | Buenos Aires | 11,680 |
| 53. | San Antonio | 10,938 |
| 54. | San Ramon | 10,765 |
| 55. | Tres Rios | 10,430 |
| 56. | Daniel Flores | 10,028 |
| 57. | Rio Segundo | 9,853 |
| 58. | Colon | 9,687 |
| 59. | San Rafael | 8,887 |
| 60. | Santiago | 8,292 |
| 61. | Santa Ana | 8,029 |
| 62. | Quepos | 7,810 |
| 63. | San Juan | 7,729 |
| 64. | Tilaran | 7,301 |
| 65. | Corredor | 7,084 |
| 66. | Guacimo | 7,022 |
| 67. | Atenas | 7,014 |
| 68. | Cot | 6,784 |
| 69. | Golfito | 6,777 |
| 70. | Llorente | 6,626 |
| 71. | Miramar | 6,540 |
| 72. | Orotina | 6,135 |
| 73. | Santo Domingo | 5,745 |
| 74. | Salitrillos | 5,738 |
| 75. | Mercedes | 5,467 |
| 76. | Pocora | 5,248 |
| 77. | Juntas | 4,737 |
| 78. | Batan | 4,584 |
| 79. | Canoas | 4,573 |
| 80. | La Asuncion | 4,383 |
| 81. | Orosi | 4,350 |
| 82. | La Cruz | 4,319 |
| 83. | Carrillos | 4,258 |
| 84. | San Marcos | 4,255 |
| 85. | Upala | 4,185 |
| 86. | Bagaces | 4,108 |
| 87. | Jaco | 4,085 |
| 88. | Tobosi | 4,060 |
| 89. | San Vito | 3,981 |
| 90. | Ciudad Cortes | 3,850 |
| 91. | Parrita | 3,734 |
| 92. | San Rafael | 3,624 |
| 93. | Zarcero | 3,559 |
| 94. | Los Chiles | 3,342 |
| 95. | Sardinal | 3,267 |
| 96. | San Ignacio | 3,072 |
| 97. | Fortuna | 3,010 |
| 98. | Pocosol | 2,947 |
| 99. | Salitral | 2,833 |
| 100. | Belen | 2,715 |
The Source for World Rankings