None of the 42 people had permission to be in the country.
The Justice Minister says 42 Brazilians have been deported from the country since June.
In a post on social media, Jim O'Callaghan says it includes 15 people serving prison sentences.
He added that none of the 42 people had permission to be here.
He said the deportations took place on commercial flights.

Daniel Kinahan Set To Apply For Bail
Former Swimming Coach George Gibney Jailed For Over 15 Years For Sexual Abuse Of Children
Robert Pether Returning To Ireland After Five-Year Iraqi Detention
Over 23,000 Teachers Beginning Industrial Action Today
New Funding Announced For Youth Services And Counselling In Kildare On World Mental Health Day
Jury In Triple Murder Trial Of Louth Family Sent Home
Appointment Cancellations Expected As Strikes To Take Place Next Week
Families Face Delays Arranging Funerals Amid Pressure On Post-Mortem Services