P43, P-43 or P.43 may refer to:
Aviation Paratech P43, a Swiss paraglider PZL.43, a Polish light bomber and reconnaissance aircraft Republic P-43 Lancer, a fighter aircraft of the United States Army Air Corps
Vessels , a corvette of the Argentine Navy , a submarine of the Royal Navy
Other uses Carro Armato P.43, an Italian heavy tank GER Class P43, a steam tender locomotive P43 route (Belarus), a road connecting to A130 highway (Russia) Papyrus 43, a biblical manuscript Phosphorus-43, an isotope of phosphorus P43, a Latvian state regional road P43, three-dimensional space group number 78