A coalition of housing advocates launched a $500,000 state-funded awareness campaign Wednesday that looks to fight back against illegal voucher-based housing discrimination.

The Fair Housing Alliance of Massachusetts, an umbrella organization for four non-profit organizations, said it is looking to educate people about on their voucher-related rights, housing laws, and free services available to those facing discrimination.

Housing Secretary Ed Augustus said there are more than 100,000 rental assistance vouchers in Massachusetts.

“Rental vouchers are not only among the most effective and evidence-based interventions to end family homelessness, rental vouchers keep people housed,” Augustus said. “Vouchers ensure that low income families, seniors and people with disabilities can afford a home in Massachusetts.”

A study from Suffolk University Law School and The Boston Foundation found people using a voucher for Section 8 housing had a low chance of touring an apartment. Nearly 90% of “undercover fair housing testers” who were using a voucher indicated they faced discrimination, according to the study.

“Some brokers told testers outright that the owner was not accepting voucher participants,” a statement on the study from the Executive Office of Housing and Livable Communities said. “Agents showed Black testers about half the number of apartments shown to white testers and were far less likely to return Black testers’ calls — just 62% of the time versus 92% for white testers.”

The media campaign will include placement of public service announcements on social media, in print and online media, and on public transportation “to raise awareness of housing discrimination and to encourage residents to take action.”