Fine Gael's Eoghan Murphy has kept his seat in Dublin Bay-South.
The outgoing housing minister will join Sinn Féin's Chris Andrews and Fianna Fáil's Jim O'Callaghan in the four seat constituency.
The three men were elected in the eighth count.
Green Party leader Eamon Ryan was the first to be elected there on Sunday.
Tweeting after his election, Mr Murphy said: "I'm humbled to have been re-elected and will continue to work hard for what I believe is best for our country, our community and our future."
I’m humbled to have been re-elected and will continue to work hard for what I believe is best for our country, our community and our future. #ThankYou to everyone who voted for me and supported me. #GE2020 pic.twitter.com/On944dN68k
— Eoghan Murphy TD (@MurphyEoghan) February 10, 2020
However Mr Murphy's party colleague Kate O'Connell has lost her seat.
The pharmacist successfully ran for election at both local and national level in 2014 and in 2016.
She strongly opposed the poor use of public finances while sitting on Dublin City Council, and fought for maintaining water fluoridation across the capital.
She also spoke passionately during the Eight Amendment referendum, being in favour of abortion up to 10 weeks of pregnancy.
Her sister, Mary Newman, is also running in the constituency of Tipperary for Fine Gael.