Electronic Journal of Differential Equations, Vol. 2010(2010), No. 81, pp. 1-11. Title: Oscillation of higher-order linear differential equations with entire coefficients Authors: Zhi Gang Huang (Suzhou Univ. of Science and Tech., China) Gui Rong Sun (Suzhou Univ. of Science and Tech., China) Abstract: This article is devoted to studying the solutions to the differential equation $$ f^{(k)}+A_{k-1}(z)f^{(k-1)}+\dots +A_0(z)f=0,\quad k\ge 2, $$ where coefficients $A_j(z)$ are entire functions of integer order. We obtain estimates on the orders and the hyper orders of the solutions to the above equation. Submitted February 10, 2010. Published June 15, 2010. Math Subject Classifications: 30D35, 34M10. Key Words: Linear differential equation; order; hyper order.