Evangelical Christianity could be growing at a rapid rate in Spain, with 12 new evangelical churches being opened each month, it has emerged.

Protestant Christianity is the fastest growing and largest minority religion in Spain, according to the latest report from the Observatory of Religious Pluralism, released in December.

There are currently 3,759 Protestant places of worship across the country, the overwhelming majority of which are evangelical.

Spain is traditionally a Roman Catholic nation, and the Catholic Church remains the dominant religion, with more than 23,000 places of worship in the country.

However, 825 new Protestant places of worship have opened in the last five years, Evangelical Focus reports.

Outside of the Christian faith, a number of other religions are represented in the country. There are 1,447 mosques, 34 synagogues and 876 Kingdom Halls for Jehovah's Witnesses.

Although 77 per cent of Spaniards profess to be Roman Catholic and the religion is deeply engrained it much of its culture, it is not the sole influence. Spain was the third country to legalise gay marriage in 2004 and moves toward the streamlining of the divorce process are popular among much of the population.