A lens assembly according to one or more embodiments of the present disclosure and an electronic device including the lens assembly may include: a first lens having positive refractive power and disposed along an optical axis and to face an object; a second lens having negative refractive power and disposed along the optical axis and adjacent to the first lens; a third lens having positive refractive power and disposed along the optical axis and adjacent to the second lens; and a fourth lens having a negative refractive power and disposed along the optical axis and adjacent to the third lens, and having a concave face that faces an imaging surface of an image sensor. The characteristics of the lens assembly satisfy a preset requirement equation(s). The lens assembly and the electronic device as described above may be variously implemented according to embodiments.