A resistor coupled Josephson logic (RCJL) family, composed of OR, AND, and 2/3 majority gates, is proposed. The RCJL family consists of multiple Josephson junctions and resistors, and employs current injected switching. OR gates have I‐O isolation capability with high input sensitivity and wide operating current margin. In the AND gate, current margin as wide as the CIL AND gate and higher input sensitivity can be achieved without inductors. Experimental verification of the RCJL family operation is also described.