Prony or de Prony may refer to:
Gaspard de Prony (1755–1839), French mathematician and engineer Prony's method, a mathematical method to estimate the components of a signal Prony equation, hydraulics equation for fictional head loss Prony series, a model of viscoelasticity Prony brake, torque measurement device Prony Bay, bay in New Caledonia Prony, a city in New Caledonia, see List of cities in New Caledonia French corvette Prony
See also Pronya, a river in Ryazan and Tula Oblasts in Russia