Due to the particular physico-geographical conditions, especially to the diverse climate of the geological substratum, to the relief and the vegetation, Macin Mountains stand out by their great variety of soil types. The soils in the park belong to the classes of Mollisols (34%) and Cambisols (66%). The soil distribution is strongly connected to climate, vegetation and lithological structure. The soil depth decreases with slope and altitude, influencing the site quality, the type and complexity of ecosystems. Although in this region it’s the Chestnut Steppe soil and the Calcareous Chernozem that predominate, further on, only the soils specific to the Northern Dobrudjan forests are briefly presented. Therefore, in what concerns the forest steppe zone the characteristic soils are: Calcareous and Clay Chernozems and also the Rendzinas.  The Calcareous Chernozem are formed especially by loess and present a horizon succession of  Am-Bv-C(Cca) type, a medium texture, small and medium crumb structure, well developed on the Am horizon. The Chernozems are rich in calciferous mild humus, whose saturation degree exceeds 85% and pH varies from 6,5 to 7. These soils are fertile for white oak and greyish oak. The Clay Chernozems appear towards the forest zone, they are formed more on loess and less on hard rocks and present an Am-Bt-C(Cca)profile, a different texture on the profile, a small and medium crumb structure in Am, 3-5% humus content, the level of base saturation can exceed 75% and the pH may go under 6,0. The soils are especially fertile for white and greyish oak (Late 1997).

The soils identified in the xerothermal sub-Mediterranean forests are the Rendzinas. Rendzinas appear in the zones where the calcareous substratum predominates, being characterized by an Am-AR-Rrz profile. They present a medium- fine texture, a raised proportion of skeleton, a well developed crumb structure, being rich in humus. The saturation degree varies between 70-100%, the pH goes from 6,0 to 7,5 and the fertility varies according to edaphic volume and the hydric supply. 

The soils identified in the zone of mesophylous broad-leaved Balkan forests are the brown eumesobasic soils, the brown clay soils and seldom the grey soils. The grey soils are mainly formed on loess, they present a Am-Ame-BtC (Cca) profile, a medium texture, a crumb structure in Am, a horizon rich in humus 3-4%, a saturation degree up to 90% and a pH reaching 6,8. They are fertile for sessile oak stand, oak stand and mixed hardwood stand, but these types of vegetation have average site classes, due to the lack of humidity in summer.   The brown clay soils are formed on loess or metamorphic/magmatic rocks, they are characterized by an Ao-Bt-C(Cca)profile, a texture that varies from fine to medium (depending on the horizon), a granular structure, 2-3% humus content, a saturation degree over 80% and a pH that goes from 6 to 7. Their fertility is variable, from medium to superior for sessile oak. The brown eumesobasic soils are formed on loams, gritstones or calcareous conglomerates, they have a Ao-Bv-C(R) profile, a variable texture, from light to hard, an Ao granular structure, less that 2% humus content, up to 10-12% saturation degree, pH of 5,8-6,5 and a base content that exceeds 55%. Fertility is increased and is favourable to sessile oak stand and mixed hardwood stand which have a superior site class.