HP11

HP11 or variant, may refer to:


 * HP11, a postcode for Wycombe Marsh, see HP postcode area
 * HP-11, an alternate name for the C battery
 * HP-11C, a calculator in the Hewlett-Packard Voyager series
 * Schreder Airmate HP-11, a glider
 * Handley Page H.P.11, an airplane that is a model of Handley Page Type O