Costa Rica does not recognize dual citizenship with any other country but Spain. [ Information on Costa Rican citizenship laws was provided by External Affairs Canada, 16 October 1989.] The Constitution of Costa Rica guarantees that any child born in the country is eligible for Costa Rican citizenship. This includes the children of Foreign Diplomats. If the child has parents holding another citizenship, a decision as to the child's citizenship must be made before s/he reaches the age of 25. Until the age of 18, the parents may decide for the child, from 18-25 it becomes the child's decision.

If either parent of a child born abroad is Costa Rican, then the child has the right to apply for Costa Rican citizenship at an Embassy.

A woman who marries a Costa Rican may apply for Costa Rican citizenship immediately, and is automatically granted it. However, although a man who marries a Costa Rican has the right to apply for citizenship, it is not automatically granted. Laws regarding marriage and citizenship are currently under review.