Its territory, which was slightly smaller than that of present Fejér county, today in central Hungary.
The river Danube formed most of its eastern border.
Fejér county arose as one of the first comitatus of the Kingdom of Hungary, in the 11th century.
Székesfehérvár, as a seat for the coronation of the Hungarian monarch and location of royal burials, held a central role in the Middle Ages.
Ethnic groups (1891): Total population: 222,445 In 1900, the county had a population of 236,102 people and was composed of the following linguistic communities:[1] Total: According to the census of 1900, the county was composed of the following religious communities:[2] Total: In 1910, the county had a population of 250,670 people and was composed of the following linguistic communities:[1] Total: According to the census of 1910, the county was composed of the following religious communities:[2] Total: In the early 20th century, the subdivisions of Fejér county were: