A Central Statistics Office survey has found 22% of people aged 18 or over say they felt discriminated against in the two years before 2024 compared to 18% in 2019.
The most common places where people experienced discrimination were in the workplace, retail and hospitality settings.
It showed that nearly half of people who identify as transgender or non-binary had experienced prejudice.
Sexual orientation had the highest levels of discrimination, with nearly six-in-ten, or 59%, of gay or lesbian people experiencing it and over half of bisexual people.
The survey also found 49% of people from "black Irish, black African and other black backgrounds had experienced discrimination".
They also faced the most prejudice when looking for housing.
Just over four-in-ten members of the Traveller or Roma community encountered discrimination.
The most common forms of workplace prejudice were bullying and harassment, which were reported by over a third of people.
Age was the most significant ground cited for discrimination when dealing with financial institutions, with 38% of those surveyed noting it.
The next most common ground was socio-economic background such address, accent, education or employment.
Disability was the top ground for discrimination cited in access to transport services at 33%.
