Abstract: New and improved interlocking sidewalk block system. The system incorporates a plurality of rectangular sidewalk blocks each having parallel top and bottom surfaces, parallel left length and right length side surfaces and parallel first end width and second end width surfaces. The first end width and second end width surfaces having a continuous channel running along the full width, said continuous channels being formed with lips at the first end width and second end width surfaces that create an internal height that is greater than the height at the surfaces. The system includes a plurality of couplers that are sized and shaped to have a cross section that fits simultaneously within two continuous channels when two sidewalk blocks are placed with a first end width surface of one block abutting the second end width surface of the second block and sliding a coupler into the continuous channels.