111 pregnancies were terminated in Co Mayo last year.
A new report from the Department of Health shows that a total of 6,666 terminations were carried out nationally in 2019.
The largest number - 2,493 - were carried out in Dublin, while Leitrim had the lowest number at 27.
280 terminations were carried out in Galway, 59 in Sligo and 43 in Roscommon.
This is the first annual report published since the grounds on which termination of pregnancy is lawfully permitted were expanded in Ireland following the 2018 referendum.