Magnetic toner

A magnetic toner, comprising:

• a toner particle comprising a binder resin, a magnetic body and an external additive;
• the binder resin comprising a styrene-acrylic resin, the styrene-acrylic resin comprising monomer units represented by Formulae (1) and (5), and a monomer unit corresponding to n-butyl acrylate
• where R1 represents a hydrogen atom or a methyl group, R2 represents a linear alkyl group having CB carbon atoms, CB is an integer of 10 to 15, and R61 represents a hydrogen atom or a methyl group;
• a content ratio of the monomer unit represented by Formula (1) in the styrene-acrylic resin being 1.0 to 10.0 mass %;
• the external additive comprising a silicone oil-treated silica;
• and
• the magnetic body being surface-treated with a compound having an alkyl group having CM carbon atoms, where CM is an integer from 4 to 20, wherein
• an average circularity of the magnetic toner is 0.940 to 0.995,
• |CM−CB|≤8, and
• in a cross-sectional observation of the magnetic toner using a transmission electron microscope, a coefficient of variation of an occupied area ratio of the magnetic body in a square grid, resulting from demarcating a cross section of the magnetic toner in a grid of 0.8 μm-side squares, is 60.0% or lower.