J20 or J-20 may refer to: * Chengdu J-20, a Chinese fifth-generation fighter aircraft * J20 SuperElit, a Swedish junior ice hockey league * J20 Elit, a Swedish second-tier junior ice hockey league * County Route J20 (California), a county road designation in California * Jeep J-20, pickup trucks * Nissan J20, a 2.0-litre (120 cu in) engine developed in the 1960s * Soko J-20 Kraguj, a Yugoslavian light attack aircraft * January 20, 2005 counter-inaugural protest, a large number of demonstrations held in Washington, D.C. and other USA cities to protest the second inauguration of President George W. Bush * DisruptJ20, a political organization founded to protest the United States presidential inauguration of Donald Trump in January 2017 * The ICD-10 code for acute bronchitis * Toyot