text: After the Treaty of Trianon the northern parts of the two counties became parts of Czechoslovakia. After the treaty 44 villages from the former Komárom county and 22 towns from the former Esztergom county stayed in Hungary. In 1923 the two counties were merged under the name "Administratively pre-merged county of Komárom and Esztergom". After the First Vienna Award in 1938, the two counties were restored to their former size. The size of Komárom county also increased significantly because the area of Csallóköz, which previously belonged to Pozsony county, was also added to it, so it consisted of six districts now, as opposed to the previous four.
  As a consequence of the temporary armistice following World War II the 1937 borders of the country were restored. Due to this a temporary administrative reorganization was conducted, where the previous Komárom and Esztergom counties were now merged for a last time under the name Komárom-Esztergom county.
  Demographics
  In 2015, it had a population of 299,110 and the population density was 132/km².
  Ethnicity
  Hungarians constitute the majority of the population. The chief minorities are ethnic Germans (approx. 9,000), Roma (4,000) and Slovaks (3,000).
  Total population (2011 census): 304,568
  Ethnic groups (2011 census):
  Identified themselves: 270 933 persons:
  Hungarians: 252 432 (93,13%)
  Germans: 9 168 (3,38%)
  Gypsies: 4 261 (1,57%)
  Slovaks: 3 174 (1,17%)
  Others and indefinable: 1 898 (0,70%)
  Approx. 48,000 persons in Komárom-Esztergom County did not declare an ethnic group at the 2011 census.
  Religion
  Religious adherence in the county according to 2011 census: