Opava (Hungarian: Apafalva) is a village and municipality in the Veľký Krtíš District of the Banská Bystrica Region of southern Slovakia.
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Population
It has a population of 110 people (31 December 2025).
Ethnicity
In year 2021 was 110 people by ethnicity 92 as Slovak, 9 as Hungarian, 3 as Not found out, 2 as Ukrainian, 2 as Albanian, 1 as Serbian, 1 as Romani, 1 as Rusyn and 1 as Other.
Note on population: The difference values of population numbers in the table "Population statistic" and in the sections "Ethnicity" & "Religion" is caused by the use of various statistical methods.
Religion
In year 2021 was 110 people by religion 38 from None, 36 from Roman Catholic Church, 26 from Evangelical Church, 3 from Not found out, 2 from Eastern Orthodox Church, 2 from Jehovah's Witnesses, 2 from Greek Catholic Church and 1 from Calvinist Church.