The Statistical Office of the Slovak Republic published preliminary results of the country's 2021 census, sharing data collected directly from Slovakian-born and foreign residents in the country in relation to citizenship, nationality and religious belief.

According to the data, as of 1 January 2021 there are more than 78 000 residents in the country with foreign citizenship - 1.07% of the country's total population. The highest concentration of foreigners can be found in Western parts of the country: in Bratislava they account for 2.72%; in Trnava 1.27%; in Nitra 1.13%; in Banská Bystrica 0.72%; in Prešov 0.6% and in Košice 0.78%.

As far as nationality is concerned, approximately 600 000 people (10.8% of the population) have non-Slovak nationality. These include Hungarians (422 000; 7.7%), Roma (67 000; 1.23%), Ukrainians (9 500; 0.17%), Russians (3 200; 0.06%) and Vietnamese (2 800; 0.05%).

Responses to a question on religious belief showed that there are 3 862 Muslims and 975 Hindus living in Slovakia, and that Roman Catholics comprise 55.76% of the population with more than 3 000 000 believers. There are also 1 300 000 people (23.79 % of the population) without religious belief.

Islam is one of three religions that have until 2021 not been included in the list of religious options in the census (the two others are Buddhism and Hinduism). In previous census editions, followers of Islam were required to select the category of "others" when specifying their beliefs. Including Islam now allows for more comprehensive results, which will provide a clearer picture on diversity in contemporary Slovakia.

Further information on the results can be found here.