Two Westmeath Senators also attended the event.
The EU Commissioner is making a "fulsome and profound apology".
It comes as three in four people want Phil Hogan and Supreme Court Judge Seamus Woulfe to resign over the 'Golf Gate' controversy.
Mr. Hogan says he spoke to both the Taoiseach and the Tánaiste yesterday and he has listened carefully to their views, which he respects.
He also says he has been reporting to the President of the European Commission on all these matters in recent days.
81 people, including many current politicians attended the Clifden event on Wednesday, which ran contrary to public health guidelines.
The fallout has resulted in a number resigning from senior political roles, including Dara Calleary as Agriculture Minister.
An 'Ireland Thinks' poll for the Irish Mail on Sunday shows 75% want both to step down after attending a Galway golf event that breached Covid-19 guidelines.
Westmeath Fianna Fail Senators Paul Daly and Aidan Davitt also attended the event and former Longford / Westmeath Fianna Fail TD Donie Cassidy, who is the President of the Oireachtas Golf Society, says he would fully co-operate with the Garda investigation.
Mr Hogan has been asked to consider his position by the Taoiseach and Tanaiste.
Meanwhile Micheal Martin will tomorrow request the Dail be recalled early following the reopening of schools.
1) I wish to apologise fully and unreservedly for attending the Oireachtas golf society dinner on Wednesday night last.
— Phil Hogan (@PhilHoganEU) August 23, 2020
Prison Dispute Linked To Fatal Arson Attack In Offaly
BnM Opens New Funding Round For Offaly Community Benefit Fund
Orange Wind Alerts Issued As Storm Bram Approaches
Irish Hauliers Threaten Protests Over Toll Discount Dispute
Former Irish Soccer Legend Backs Offaly Community After Arson Attack
Tributes Paid To Former Fine Gael Midlands Politician
Midlands 103 Launches Joint Christmas Appeal With Simon Community
Offaly Arson Attack Is An Attack On Society Itself - Taoiseach
Woman Facing Life In Prison After Double Midlands Murder
Housing Committee Chair Flags Cost Concerns Over Apartment Fire Safety Scheme
Justice Minister Wants People To Come Forward Over Offaly Arson Attack
New Report Warns Of “Poor Liquidity” As Ireland’s Housing Market Stalls
Laois TD Renews Calls For Updated Wind Farm Guidelines
Midlands Man Laid To Rest Today
Anti-Racism Funding Granted For Offaly And Westmeath Groups
Gardaí Begin Murder Investigation After Child And Woman Dies In Offaly House Fire
Ashling Murphy Murder "Wrongly Accused" Granted Bail Over Theft Charge
Young Boy And Woman Killed In Offaly House Fire
Laois Makeup Artist Warns Of Expired Suncream Dangers
Lynx and Wolves In Ireland Pose Minimal Threat - Offaly Biodiversity