The county has a total area of 7,754 km2 (2,994 sq mi), representing 3.6% of national Romanian territory.

In terms of climate, the characteristics of Arad county have a typical temperate continental climate with oceanic influences, with a circulation of air masses with a predominantly western ordered direction visible from west to east, with increasing altitude.

Average annual temperatures range from 10 °C in the lowlands, the hills and piedmonts 9 °C, 8 °C and 6 °C in the low mountains in the area of greatest height.

The agricultural potential is greatly put into value, Arad plains being considered one of the most important cereal and vegetable producing basins.

[7] In 1930, the county's urban population was 77,181 inhabitants, 39.3% Romanians, 38.8% Hungarians, 9.1% Jews, 7.1% Germans (Banat Swabians), 1.7% Serbs and Croats, 1.4% Slovaks, as well as other minorities.