  In this paper we show that the entropy of a cosmological horizon in
topological Reissner-Nordstr\"om- de Sitter and Kerr-Newman-de Sitter spaces
can be described by the Cardy-Verlinde formula, which is supposed to be an
entropy formula of conformal field theory in any number of dimension.
Furthermore, we find that the entropy of a black hole horizon can also be
rewritten in terms of the Cardy-Verlinde formula for these black holes in de
Sitter spaces, if we use the definition due to Abbott and Deser for conserved
charges in asymptotically de Sitter spaces. Such result presume a well-defined
dS/CFT correspondence, which has not yet attained the credibility of its AdS
analogue.
