From the Wikipedia page 
Jbeil District (Arabic: قضاء جبيل; transliteration: Qadaa' Jbail) is a district (qadaa) of the Mount Lebanon Governorate of Lebanon. It is located to the northeast of Lebanon's capital Beirut. The capital is Byblos, also known as Jbeil. The rivers of al-Madfoun and Nahr Ibrahim form the district's natural northern and southern borders respectively, with the Mediterranean Sea bordering it from the west and Mount Lebanon from the east, separating it from the adjacent district of Baalbek in the Beqaa Valley.