Marginal may refer to:

• Marginal (album), the third album of the Belgian rock band Dead Man Ray, released in 2001
• Marginal (manga)
• El Marginal, Argentine TV series
• Marginal seat or marginal constituency or marginal, in politics

• Marginalism
• Marginal analysis
• Marginal concepts
• Marginal cost
• Marginal demand
• Marginal product
• Marginal product of labor
• Marginal propensity to consume
• Marginal rate of substitution
• Marginal use
• Marginal utility
• Marginal rate

• Margin (disambiguation)
• Marginalization
• Marginal intra-industry trade, where the change in a country's exports are essentially of the same products as its change in imports
• Marginal land, land that is of little value because of its unsuitability for growing crops and other uses
• Marginal model, in hierarchical linear modeling
• Marginal observables, in physics; see Renormalization group
• Marginal person, in sociology; see Marginalization
• Marginal plant, see Bog garden
• Marginal probability or Marginal distribution, in probability theory
• Marginal sea, commonly has two differing meanings
• Marginal seat, a constituency held with a small majority in an election
• Marginal sulcus, a portion of the cingulate sulcus of the brain
• Marginal zone B-cell, noncirculating mature B cells that segregate anatomically into the marginal zone (MZ) of the spleen