The object of this research is to establish verbal and visual intelligence abilities among bilingual and monolingual youth teenagers. There were 150 Lithuanian speaking younger teenagers 12-14 year old from J. Basanavičiaus and Senamiesčio secondary schools in Ukmergė and 150 Lithuanian-Polish speaking youth teenagers from 12-14 year old from J. Lelevel secondary school in Vilnius that took part in the research. An attempt is made using R. Amthauer Intelligenz-Struktur Test I S T 70 verbal and visual subtests. There were raised such hypotheses: 1. Verbal intelligence abilities of monolingual and bilingual youth teenagers differ. 2. Visual intelligence abilities of monolingual and bilingual youth teenagers don‘t differ. The data were comparing among bilingual and monolingual youth teenagers, 12 year old bilingual and monolingual youth teenagers, 13 year bilingual and monolingual youth teenagers, 14 year bilingual and monolingual youth teenagers. The conclusion received during this research is that intelectual verbal abilities among bilingual youth teenagers differ only partly, intelectual visual abilities among bilingual youth teenagers don’t differ.