In this paper we investigate Hankel operators H f :where A 2 m are general Fock spaces. We will show that H f is not continuous if the corresponding symbol is not a polynomial f = N k=0 b k z k . For polynomial symbols we will give necessary and sufficient conditions for continuity and compactness in terms of N and m. For monomials z k we will give a complete characterization of the Schatten-von Neumann p-class membership for p > 0. Namely in case 2k < m the Hankel operators H z k are in the Schattenvon Neumann p-class iff p > 2m/(m−2k); and in case 2k m they are not in the Schatten-von Neumann p-class.