[Problem] The problem to be addressed is to provide a dielectric composition having good dielectric constant and good DC bias characteristics when DC bias is applied, and also having good high temperature load life and good mechanical strength; In addition, to provide a dielectric device, an electronic component, and a multilayer electronic component including the dielectric composition. [Solution] A dielectric composition comprising particles having a perovskite crystal structure comprising at least Bi, Na, Sr and Ti. The dielectric composition, when taking Ti as 100 mol parts, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Yb, Ba, Ca, Mg and Zn, and at least one 0.5 mol part selected from 11.1 Includes between moles. 0.17 ≤ α ≤ 2.83, where α is the molar ratio of Bi to Sr. At least some of the particles include a high-Bi phase having a Bi concentration of at least 1.2 times the average Bi concentration throughout the dielectric composition. The total surface area of the high-Bi phase in the particles is between 0.1% and 15% of the total surface area of the particles.
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