<p>This study develops a novel soil suitability criterion for compressed earth block (CEB) production, addressing the shortcomings of existing methods. Soils with distinct physical properties were sourced from five deposits and their fine particles were assessed using X-ray diffraction, sedimentation, and methylene blue value analysis. By systematically modifying their granulometries, 50 soil samples with controlled properties were produced. The static optimum moisture content (OMC) for each sample was determined, guiding the production of CEBs. These blocks were tested for compressive strength, and select samples were further analyzed for drying shrinkage. Building on the obtained findings, empirical models predicting compressive strength and shrinkage were developed, enabling the formulation of an objective soil suitability criterion based on desired levels for minimum compressive strength and maximum drying shrinkage thresholds. The model demonstrated consistent results when soils from other regions were evaluated, highlighting the robustness of the established criteria. The proposed criterion is easy to implement, saves time, and offers flexibility by allowing soil suitability to be assessed based on any desired values for CEB strength and shrinkage.</p>