An ink composition including a colorant, a solvent, and a surface property treatment agent represented by the following formula (1):
where each of Y1, Y2, and Y3 is independently —N(R3)- or —O—. R3 is H, a C1-C20 alkyl group, or a C6-C20 aryl group, each of R1 and R2 is independently a chemical bond, a C1-C10 alkylene group, a C2-C10 alkenylene group, a C2-C10 alkynylene group, or a C1-C20 alkyl group including a C2-C10 alkenylene group or a C2-C10 alkynylene group, 1≦a≦7, and b, c≧0 are integers, each of A and B is a hydrophobic moiety or are connected to each other to form a ring, A and B cannot simultaneously be H, and B can be a hetero atom. The ink composition can reduce smearing by increasing the rate of penetration into paper and may increase a duration of storage stability, while using little or no surfactant.