He was a member of
Offaly County Council for the
Tullamore local electoral area from
1991 to 2011. He represented Fianna Fáil in
talks on government formation in 2016 and 2020. In July 2020, it emerged that Cowen had a conviction for
drink driving. Cowen was fined €200 and was disqualified from driving for three months. The incident occurred in September 2016, after an
All-Ireland football final between
Dublin and
Mayo. Cowen apologised for his "serious lapse of judgement". The
Garda Síochána Ombudsman Commission was asked by the
Gardaí to investigate the alleged leaking of information concerning Minister for Agriculture Barry Cowen's drink driving arrest. Cowen accused gardaí of criminality for leaking allegations that he attempted to evade a garda checkpoint before he was caught drink driving. Cowen admitted receiving a ban for drink drinking but denied attempting to evade gardaí. He issued a statement that the garda record was "incorrect" and suggested he would take legal action against the
Sunday Times, which first reported the story. Cowen said that the leaks were a flagrant breach of criminal law and “my rights under data protection law” and that they were an "attempt to cause me the maximum personal and political harm." Fianna Fáil TD
Thomas Byrne has denied that it was he who leaked news of Cowen's ban to the press. Eamon Dooley, a long serving Fianna Fáil member of Offaly County Council, claimed that a party member with a "grudge" leaked it to the media. On 14 July 2020, after Cowen refused to resign as Minister for Agriculture,
Taoiseach Micheál Martin advised
President Michael D. Higgins to sack Cowen from cabinet due to the controversy surrounding his conviction for drink driving. In accordance with Irish constitutional practice, Higgins did so. In November 2020, it was reported that a barrister was to be questioned by GSOC in relation to the leak. In 2021, GSOC searched a Garda station in Munster in relation to the leak. In July 2021, Cowen called on Fianna Fáil to form a new "modern centre-left" alliance with the Labour Party for the next election. In March 2023, political news website
The Ditch reported that Cowen had failed to declare rental income from 32 acres of farmland, in breach of
Standards in Public Office Commission rules. Cowen subsequently confirmed that he intended to correct his declaration to the Dáil Register of Interests. In 2023 he opposed extending the eviction ban put in place during the
COVID-19 pandemic, comparing an extension to "making sweets free for children". These comments caused controversy and he subsequently apologised for the remarks. In 2024, Cowen won the Fianna Fáil nomination to stand in the
2024 European Parliament election in the
Midlands–North-West constituency, defeating senators
Niall Blaney and
Lisa Chambers at the selection convention. Blaney and Chambers were both added to the Fianna Fáil election ticket later. Cowen was elected to the second of five seats in the constituency. He took office on 17 July 2024. ==See also==