An electrostatic sprayer comprising: a high voltage input head; an elongated nozzle body supported in downstream relation to said input head; a liquid feed tube made of electrically conductive material disposed within said nozzle body and extending in downstream relation to said input head; said liquid feed tube being connectable to a pressurized liquid supply for directing liquid through said feed tube; said nozzle body and liquid feed tube defining an annular atomizing gas passage within said nozzle body; said input head having a high voltage cable in electrical contact with said liquid feed tube and for connection to a high voltage electrical source for electrically charging said liquid feed tube and liquid directed through said feed tube; said input head having a pressurized gas inlet in communication with said annular atomizing gas passage and for connection to a pressurized atomizing gas supply for directing pressurized atomizing gas through said annular atomizing gas passage characterized by: an external mix cluster head spray nozzle assembly mounted at a downstream end of said elongated nozzle body, said external mix cluster head spray nozzle assembly including a cluster head body; said external mix cluster head spray nozzle assembly having a plurality of circumferentially space spray tips each disposed in a respective spray tip receiving opening of said cluster head body; said spray tips each having a liquid flow passage with an upstream end communicating with said liquid feed tube for receiving electrically charged liquid from said feed tube and a downstream discharge orifice for discharging a liquid spray from said cluster head spray nozzle assembly; and said cluster head body defining an air passage about each spray tip that communicates with said annular atomizing gas passage for directing atomizing gas about said spray tip discharge orifice for atomizing liquid discharging from each spray tip external to said cluster head body. a high voltage input head; an elongated nozzle body supported in downstream relation to said input head; a liquid feed tube made of electrically conductive material disposed within said nozzle body and extending in downstream relation to said input head; said liquid feed tube being connectable to a pressurized liquid supply for directing liquid through said feed tube; said nozzle body and liquid feed tube defining an annular atomizing gas passage within said nozzle body; said input head having a high voltage cable in electrical contact with said liquid feed tube and for connection to a high voltage electrical source for electrically charging said liquid feed tube and liquid directed through said feed tube; said input head having a pressurized gas inlet in communication with said annular atomizing gas passage and for connection to a pressurized atomizing gas supply for directing pressurized atomizing gas through said annular atomizing gas passage characterized by: an external mix cluster head spray nozzle assembly mounted at a downstream end of said elongated nozzle body, said external mix cluster head spray nozzle assembly including a cluster head body; said external mix cluster head spray nozzle assembly having a plurality of circumferentially space spray tips each disposed in a respective spray tip receiving opening of said cluster head body; said spray tips each having a liquid flow passage with an upstream end communicating with said liquid feed tube for receiving electrically charged liquid from said feed tube and a downstream discharge orifice for discharging a liquid spray from said cluster head spray nozzle assembly; and said cluster head body defining an air passage about each spray tip that communicates with said annular atomizing gas passage for directing atomizing gas about said spray tip discharge orifice for atomizing liquid discharging from each spray tip external to said cluster head body. an external mix cluster head spray nozzle assembly mounted at a downstream end of said elongated nozzle body, said external mix cluster head spray nozzle assembly including a cluster head body; said external mix cluster head spray nozzle assembly having a plurality of circumferentially space spray tips each disposed in a respective spray tip receiving opening of said cluster head body; said spray tips each having a liquid flow passage with an upstream end communicating with said liquid feed tube for receiving electrically charged liquid from said feed tube and a downstream discharge orifice for discharging a liquid spray from said cluster head spray nozzle assembly; and said cluster head body defining an air passage about each spray tip that communicates with said annular atomizing gas passage for directing atomizing gas about said spray tip discharge orifice for atomizing liquid discharging from each spray tip external to said cluster head body.