Debrecen (Latin: Debretinum, German: Debrezin, Slovak: Debrecín, Romanian: Debrețin, Polish: Debreczyn) about 38.2% of the county's population lives here. Debrecen is the largest city in the Trans-Tisza region. It is sometimes referred to as “Calvinist Rome” or “civilian city”. The region of Eastern Hungary, the statistical region of the Northern Great Plain and the intellectual, cultural, economic, tourist and transport center of the Great Trans-Tisza landscape are one of the most dynamically developing cities in Hungary.

It is first mentioned in writing in the 13th century. In 1361 it was given the rank of a market town, in 1693 it was a free royal town. Its name was known throughout the continent for its famous fairs and Reformed school, which was also outstanding in Europe. Twice in its history, it was the seat of Parliament: in 1848–49, and in 1944. He has been the victim of fire several times over the centuries, suffering significant damage during World War II. Prior to the 1950 county settlement, it belonged to Hajdú County. Debrecen City Day: April 11


I do not know the circumstances that led to the establishment of Debrecen, but I cannot explain what could have enabled thirty thousand people to choose a region where they have no spring, no river, no fuel, no building material…
- English traveler Robert Townson, 1793

It is located in the eastern part of the country, not far from the geographical center of Hajdú-Bihar county, 230 km from Budapest. The Romanian border stretches for about 35 kilometers to the east. The main roads 4, 33, 35, 47, 48, 354 and 471, as well as the M35 motorway and the 100, reach Debrecen. Railway lines 105, 106, 108, 109, 110 and 333 (Zsuzsivasút).

The city is located near two landscapes, Hajdúhát and Nyírség. The Nyírség is a sandy area, sloping from north to south, its western border is at the Tócó valley. Hajdúhát is a loess area, it slopes to the west. The whole area of ​​Debrecen is located in Nyírség. There are no significant altitude differences, the altitude point in the wall of the Debrecen Reformed College is 119.6 meters above sea level.

The settlement was built primarily on Third- and Quaternary sedimentary rocks and black agricultural soil.

The number of hours of sunshine in and around Debrecen is about 2,000 per year, based on a long-term average. In 2013, the highest number of hours of sunshine in the country was measured here, which was 2321.7 hours this year.

The average annual temperature is around 10 ° C. The warmest month is July with an average temperature of +20 ° C and the coldest is January with an average temperature of −2 ° C. In addition to the winter months, frosts in April or May are common.

In 2018, Debrecen fell into the small area where the number of hours of sunshine was the highest in the country and the least rainfall.