The administrative territory of Biharia is located in the central-west region of the Bihor County, on the border with Hungary.
From an administrative point of view located to the west is Bor? and Hungary to the North Tama?eu and Salard, to the East Cetariu and South the city of Oradea and Paleu.
Biharia is crossed from west to east by the County Road DJ 191 Biharia-Salard-Marghita and from north to south National Road DN19 Oradea-Carei-Satu Mare.
Also the at the level of Biharia there is a train station which is crossed by 11 trains daily, going on the routes Oradea-Halmeu, Oradea-Valea lui Mihai and Oradea-Satu Mare.
The total Surface of the local authority is of 6.337 ha, representing approximately 8,4% from the total surface of the Metropolitan Area and 0,8% of the total surface of Bihor County.
Biharia had on the 1st of July 2010, a stable population of 4.020 persons, of which 1.978 men and 2.042 women. In relation to the population of the entire metropolitan area Biharia is accounted with 1,6%, and in relation to the county population the number is of 0,7%. The population of Biharia is 7,9% from the total rural population at the level of the Oradea Metropolitan Area.
The population structure by nationalities, according to the results of the General Census from 2002, state that the majority of Biharia’s inhabitants were of Hungarian nationality (89,5% of the total stable population); Romanians representing only 10%.
In terms of confession, 69,0% of the inhabitants were belonging to the Christian reformed church, 14,9% Catholics, 8,7% Orthodox, 3,8% Baptists and the remaining 3,6% did not declare.
Biharia is formed by two villages: Biharia – the administrative center of with a population of 3.188 inhabitants (Population Census from 2002) and Cauaceu with a population of 677 inhabitants. Therefore in Biharia village approximately 82,5% from the total inhabitants of the local authority live, whereas the inhabitants of Cauaceu village represents 17,5% of the total population.
Out of the total surface, 90% is represented by plain, and 10% hills. Cosmo creek crosses the settlement coming from the S-E to the N-V on a distance of 5 km. The plain “Câmpia Crisurilor” can be divided into two categories: higher plains and lower plains. Biharia is located on the higher plain. The high plain was formed through the sedimentation process and erosion and has a slight slope form East to West. The climate of the area is continental one with oceanic influences. The average annual temperature is of 10,3oC. Rainfall is strongly influenced by the geographical position – having and oceanic influence- averages in a year to 560 mm. The vegetation is overall specific to the common plain vegetation. Clusters of deciduous forests are common. The hills stretching to the East are especially good for wine yards. The water system is made up by creeks that spring from the hills, such as Cosmo and Crisul Mic, affluent of Crisu River. The open greeneries are used for agriculture of for pastures.
The main resources of the soil are given by, the arable lands that cover 72% of the overall territory of the authority and pastures and hayfields covering almost 12% from the total territory.
At the level of Biharia a historic monument present of the list of historic monuments at the level of Bihor County, is found: Cetatea Biharia (Biharia fortress reference number on the above mentioned list - BH-I-s-A-00951) "Cetatea de pamânt” (The fortress of dirt), IX - X centuries Early medieval period.
Other historical objectives are represented by „Lutarie si Caramidarie” (Pottery and brick, settlement grave yard XIV century) and „Gradina de legume” (The vegetable garden settlement from the XI-XIII century). Other objectives of interest are; the “Biserica reformata” ( XIII century) -Parhida and the touristic objectives “Cetatea lui Menumorut” (Menumorut’s Fortress) and the statue of the king "Sfântu Stefan".