Lebanese Christians are shook as f*ck They have been too shook to do an official census since 1932.
Lebanon has a delicate balance after the civil war where the President is always a Christian, the Prime Minister is always Sunni and Speaker of Parliament is always Shia.
A 2012 study conducted by Statistics Lebanon, a Beirut-based research firm, found that Lebanon's population is estimated to be 54% Muslim(27% Shia; 27% Sunni), 5.6% Druze, 40.4% Christian (21% Maronite, 8% Greek Orthodox, 5% Melkite, 6.4% other Christian denominations like Armenian Orthodox, Armenian Catholic, Syriac Catholic, Syriac Orthodox, Roman Catholic, Chaldean, Assyrian, Copt).
The CIA World Factbook estimates (July 2017) the following: Muslim 57.7% (28.4% Shia, 28.7% Sunni), Christian 36.2% (Maronite Catholics are the largest Christian group), Druze 5.2%, and very small numbers of Zoroastrians, Jews, Baha'is, Buddhists, Hindus, and Mormons.
Luckily for them that the Shia and Sunni are around the same number and they despise each other. Eventually though both Sunni and Shia will outnumber Christians by themselves due to the unbeatable Muslim birth rate.