Some of the Parts are made in the USA, Foxcon is opening a plant in america that will also make chips.
Accelerometer: Bosch Sensortech, based in Germany with locations in the U.S., China, South Korea, Japan, and Taiwan
Audio chips: Cirrus Logic, based in the U.S. with locations in the U.K., China, South Korea, Taiwan, Japan, and Singapore
Battery: Samsung, based in South Korea with locations in 80 countries
Battery: Sunwoda Electronic, based in China
Camera: Qualcomm, based in the U.S. with locations in Australia, Brazil, China, India, Indonesia, Japan, South Korea, and more than a dozen locations through Europe and Latin America
Camera: Sony, based in Japan with locations in dozens of countries
Chips for 3G/4G/LTE networking: Qualcomm
Compass: AKM Semiconductor, based in Japan with locations in the U.S., France, England, China, South Korea, and Taiwan
Glass screen: Corning, based in the U.S., with locations in Australia, Belgium, Brazil, China, Denmark, France, Germany, Hong Kong, India, Israel, Italy, Japan, South Korea, Malaysia, Mexico, Philippines, Poland, Russia, Singapore, South Africa, Spain, Taiwan, The Netherlands, Turkey, the U.K., and the United Arab Emirates
Gyroscope: STMicroelectronics. Based in Switzerland, with locations in 35 countries
Flash memory: Toshiba, based in Japan with locations in over 50 countries
Flash memory: Samsung
LCD screen: Sharp, based in Japan with locations in 13 countries
LCD screen: LG, based in South Korea with locations in Poland and China
A-series processor: Samsung
A-series processor: TSMC, based in Taiwan with locations in China, Singapore, and the U.S.
Touch ID: TSMC
Touch ID: Xintec. Based in Taiwan.
Touch-screen controller: Broadcom, based in the U.S. with locations in Israel, Greece, the U.K., the Netherlands, Belgium, France, India, China, Taiwan, Singapore, and South Korea
Wi-Fi chip: Murata, based in the U.S. with locations in Japan, Mexico, Brazil, Canada, China, Taiwan, South Korea, Thailand, Malaysia, Philippines, India, Vietnam, The Netherlands, Spain, the U.K., Germany, Hungary, France, Italy, and Finland