Bosnia figured in all Croatian national-political conceptions of the 19th century as an important part of Croatian or a wider South Slavonic historical, political and national territory. This paper examines the position of this land in the original ideology of Yugoslavism formulated by Franjo Rački and Josip Juraj Strossmayer at the beginning of the 1860s. This ideological system greatly influenced and contributed to Croatian national integration in the second half of the 19th century. The paper consists of a general description of Yugoslavism, which has yet to be done in such scope and form in the Czech language, and a detailed analysis of the status and role of Bosnia and Bosnians within this Croatian national integration ideology and in the political thinking of its creators. The main sources used include political treatises, brochures, newspaper articles, speeches and correspondence.