A multi million-dollar American public relations push spruiking Mormonism in Australia will focus solely on the Brisbane region, the country's own version of Salt Lake City.

The “I am a Mormon” campaign was launched across nine cities in the US last year and aims to address stereotypes about the Church of Jesus Christ of Latter-day Saints, including the practice of polygamy.

The Mormon Church is running an unprecedented public relations campaign.

Last month, the church announced the advertising spend had increased to take in 13 major American cities including Austin, Seattle and Atlanta, as well as Brisbane.

LDS Queensland media director Sue Owen said the city was at the heart of a Mormon congregation estimated at 37,000 people - the largest in the country, followed closely by Sydney.