If by albums you mean studio albums, 4. Though 2 are half live, half studio.
Fresh Cream - 1966 (tracklists are slightly different between the US and UK pressings.)
Disraeli Gears - 1967
Wheels of Fire - 1968 (half live, half studio)
Goodbye - 1969 (half live, half studio, released after band disbanded.)
There have been numerous posthumous releases, including live albums, compilations, BBC sessions, greatest hits compilations, and the like. The band did a brief reunion in the mid-2000s and put out a live CD/DVD of it.