I don't know all but I know some.
Egypt, Sudan, Syria, Turkey, Morocco, Azerbaijan, United Arab Emirates, Oman, Lebanon...
additional answer:
The biggest Muslim countries (with majority number of Islam practising population) are:
Indonesia, Pakistan, Bangladesh
mecca
It means Muslims of the countries with Muslim majority population (around 50 countries).
Most Muslim countries report 99-100% of their population is Muslim. The countries with the largest Muslim population are Indonesia, Pakistan, and India, even though they are 88, 95, 13.5% Muslim, respectively.Countries that report being 100% Muslim are: Saudi Arabia & Somalia, with Afghanistan, Maldives, and Turkey reporting above 99% but below 100%.
Indonesia.
tehran
there are many non muslim countries .USA, UK ,CHINA, SPAIN, INDIA, FRANCE, JAPAN, RUSSIA and many more
Asia has the largest Muslim population
About 50 countries have a muslim majority population
Name of Muslims country
Only Albania and Kosovo have the majority of the population being Muslim.
Pakistan occupies a key position for its high Muslim population and its borders with many other Islamic countries.
list of Muslim countries with percentage of Muslim population higher than 80% (81% to 99.7%)AfghanistanTunisiaIranWestern SaharaAzerbaijanMauritaniaYemenMoroccoIraqNigerSomaliaMaldivesComorosJordanTurkeyAlgeriaPalestineSaudi ArabiaDjiboutiLibyaPakistanUzbekistanSenegalKuwaitGambiaEgyptTurkmenistanMaliSyriaKosovoBangladeshIndonesiaOmanKyrgyzstanGuineaTajikistanBahrain