Sunan na Jihar Guarico An sanya shi tun daga Afrilu 28, 1856, kuma ya fito ne daga kogin wannan sunan, rafi wanda yake kusa da jihar Carabobo. A cikin yaren mutanen Indiyawa kalmar "guárico" na nufin "cacique."
Yankin Guarico na yanzu asalinsa ya kasance ne 'yan asalin gida uku da Arawaks, da Caribbeans da kuma Ciparicotos. Da isarwar mishaneriwan Spain, Indiyawa na wannan yankin sun sami al'adun Yammacin tufafi da dasa auduga, yayin da matan asalin ƙasar suka koyi yin juji.
Wannan shine yadda a cikin ƙarni na XNUMX ya fara zama mai yawa San Juan de los Morros, waɗanda asalin waɗannan baƙi na Turai suka kafa, waɗanda suka sa masa suna bayan wasu tsaunukan dutse da suka yi iyaka da garin. Wadannan manyan duwatsun farar ƙasa, tare da maɓuɓɓugan ruwan zafi, sun kasance tushen mamaki da sha'awa ga matafiya da masu ilimin halitta kamar Alejandro de Humboldt da Jean-Baptiste Boussingault.
A cikin ƙasashe da yankuna kewaye, abubuwa daban-daban kamar su Yaƙin Tarayya da Yaƙin Independancin kai. Sauran abubuwan tarihin da suka faru a wannan jihar sune tawaye ga Welser a 1795, zuwan Miranda a 1806, ƙaddamar da José Leonardo Chirinos a cikin 1795 da Colinada a cikin 1874, akan gwamnatin Antonio Guzmán Blanco.
La birni kurkuku Da farko ita ce cibiyar siyasa da aiki ta jihar Guárico, amma har zuwa 1934, San Juan an kafa shi a matsayin babban birnin wannan yanki na llanera ta hanyar dokar Janar Juan Vicente Gómez. An cimma wannan ta hanyar yarjejeniya tsakanin majalisun dokokin Guárico da Aragua, inda aka yi musayar yankuna da Guárico ya baiwa Aragua garuruwan Taguay da Barbacoas, kuma Aragua ya ba da garin San Juan de los Morros.
Yau ƙasar Guárico tare da jihohi Apure da Barinas, ya kasance yankin na filayen kuma an raba shi zuwa kananan hukumomi 15 masu cin gashin kansu da kuma majami'u 39.