The Garda Ombudsman has received 957 complaints of malpractice against Gardaí this year.
They contain more than 1,400 separate allegations, which include sexual offences, theft and fraud.
Almost 500 allegations relate to 'abuse of authority' or 'neglect of duty.'
Nearly 500 are made against officers in Dublin, while there's also high numbers in Cork City, Kildare, Limerick and Galway.
According to details released under the Freedom of Information Act, only one has been upheld, but the majority are still open.
Frank Thornton is the vice president of the Garda Representative Association, he says the number of allegations are down on other years.
"It's encouraging from a Garda point of view, because it shows a trend that it is declining. And if the trend continues to year-end, the complaints against Gardaí will be down about seven or 8% compared to last year - which also showed a drop compared to 2017".