A county which had continuously been exposed to Turkish incursions lying between the Kingdom of Hungary and Transylvania, and in which there were far-reaching fights for its possession provides an excellent research opportunity. The reason for this is that inthe second half of the 16th century, not only the Principality of Transylvania was beingformed, but Partium was also emerged by the name of Tiszántúl Parts largest region ofwhich was Bihar County. In the present study, I examined the site censuses of the 16th Century Bihar County preserved between 1552 and 1597, and the house censuses between 1598 and 1599. Most importantly, I would like to show – by using unpublished, primary sources and merging the results of the literature up to the present day – howimportant data can be retrieved by examining the site- and house censuses. My future goal is to map the society of holders, based on the censuses.