How many current member countries of NATO?

NATO is an Alliance that consists of 30 independent member countries.
On 27 March 2020, North Macedonia became NATO’s newest member, upon depositing its instrument of accession to the North Atlantic Treaty with the US State Department in Washington DC. NATO Allies signed North Macedonia’s Accession Protocol in February 2019, after which all 29 national parliaments voted to ratify the country’s membership.
Source- NATO