Health Minister Terrence Deyalsingh made the announcement at a media briefing on Monday.
Confirmation of the birth abnormality came after a blood test which was done last week.
Deyalsingh said the child's parents were informed of the diagnosis on Friday.
The child was born in September.
Deyalsingh noted that treatment for Zika affected babies would not be standard as developmental challenges vary with each case.
However, he revealed that the Ministry, through the Caribbean Public Health Agency has already enlisted the help of experts from Brazil and Canada to supplement the local pool of specialists.
Deyalsingh added that the number of microcephaly cases caused by Zika may increase in the coming months.
In September a baby was born with the birth defect microcephaly, following which the mother was tested for the Zika virus, with a positive result.
According to reports, the mother showed no signs of the Zika virus during pregnancy.
However, when the baby was diagnosed with microcephaly, the mother was tested and it was confirmed that she had the Zika virus.