The total land area of the municipality of Malitbog is approximately at 581.85 km² based on Administrative/Thematic Maps of DENR-CENRO Office No. B-340 and certified by Land Management Bureau.
The classified forest land is estimated at 505.15 km² or 86.82 percent of the total land area. Only 76.70 km² or 13.18% of the total land area of Malitbog is classified as alienable and disposable lands.
The Thematic Maps from CENRO that are gathered from Topographic Map of NAMRIA, showed that there are three categories of vegetative cover in the municipality: Timber Lnd is one of the categories that covers the largest part of the total land area with an estimated area of about 338.73 km² or 58.22 percent of the total land area of the municipality. Timberland is within Forest Land that can be found only in Barangay San Luis and Kiabo.
Cultivated Area developed for agricultural endeavors and areas settled in by people covers an estimated area of 162.24 km² or 27.88 percent of the total land area of Malitbog. Alienable and Disposable Lands is within this cultivated area having an area of only 76.70 km². These A&D Lands are intended for settlements and agricultural development and can be found in the north and northwestern side of Malitbog. All barangays of Malitbog have A&D lands, though these are particularly small with barangay Siloo, Sampiano and Sta. Inez. The total cultivated area minus the A&D lands will have a difference of 85.54 km² or 14.70 percent of the total land area of Malitbog. This area is within forest land can be found also in all barangays.
Grassland on the other hand covers most part of barangay Sampiano and Siloo with small patches dots of barangay San Luis. Grassland category is within forest land having an estimated area of 80.88 km² or 13.90 percent of the total land area of Malitbog.