The citizens hail from India, Bangladesh, Thailand and Brunei Darussalam.

Mayor David Grimble said it was fitting to host the ceremony during Cultural Diversity Week.

He presented the new citizens with certificates, Australian flags and plants at Horsham Civic Centre.

Members of the Sing Australia choir closed the ceremony with a performance of Advance Australia Fair.

Among those making the pledge was Remya Lonappan, who emigrated from Kerala in southern India four years ago.

"Most of us here are from Kerala," she said.

"We had 16 members of our family come over at almost the same time."

Mrs Lonappan has spent the past three and a half years in Horsham.

She said she had settled into the Wimmera with ease with her husband Manoj Pulickan and their one-year-old son Johaan.

"When I was a young girl growing up in India I always wanted to come to Australia," she said.

Mrs Lonappan was joined by fellow new citizens Smitha Sunil, Digna Henry, Rekha Kumara, Jisha Jose, Thinatorn Panbua, Sunil Puduppully, Joseph Varghese, Abdul Aziz, Mashfika Parvin and Sharath Sunil.