A scroll compressor comprising: a housing; scroll compressor bodies (110, 112) disposed in the housing, the scroll bodies (110, 112) including a first scroll body and a second scroll body, the first and second scroll bodies (110, 112) having respective bases (116, 120) and respective scroll ribs (114, 118) that project from the respective bases (116, 120), wherein the scroll ribs (114, 118) mutually engage, the second scroll body being movable relative to the first scroll body for compressing fluid; a drive unit configured to rotate a drive shaft to drive the second scroll body in an orbital path, the drive shaft having a longitudinal axis and an eccentric drive pin configured to engage a drive hub on the second scroll body; and a counterweight comprising: a hub portion with an opening therein that permits the counterweight to be assembled onto the drive shaft; a perimeter portion attached to the hub portion, and positioned radially outward from the hub portion; and a radial axis dividing the perimeter portion into two unequal parts and the radial axis devides the counterweight into a first region above the radial axis, and into a second region below the radial axis, characterized in that the mass of the hub portion in the first region is equal to the mass of the hub portion in the second region, and the mass in the perimeter portion is axially distributed between the first and second regions such that the center of mass of the counterweight is located along the radial axis. a housing; scroll compressor bodies (110, 112) disposed in the housing, the scroll bodies (110, 112) including a first scroll body and a second scroll body, the first and second scroll bodies (110, 112) having respective bases (116, 120) and respective scroll ribs (114, 118) that project from the respective bases (116, 120), wherein the scroll ribs (114, 118) mutually engage, the second scroll body being movable relative to the first scroll body for compressing fluid; a drive unit configured to rotate a drive shaft to drive the second scroll body in an orbital path, the drive shaft having a longitudinal axis and an eccentric drive pin configured to engage a drive hub on the second scroll body; and a counterweight comprising: a hub portion with an opening therein that permits the counterweight to be assembled onto the drive shaft; a perimeter portion attached to the hub portion, and positioned radially outward from the hub portion; and a radial axis dividing the perimeter portion into two unequal parts and the radial axis devides the counterweight into a first region above the radial axis, and into a second region below the radial axis, characterized in that the mass of the hub portion in the first region is equal to the mass of the hub portion in the second region, and the mass in the perimeter portion is axially distributed between the first and second regions such that the center of mass of the counterweight is located along the radial axis. a hub portion with an opening therein that permits the counterweight to be assembled onto the drive shaft; a perimeter portion attached to the hub portion, and positioned radially outward from the hub portion; and a radial axis dividing the perimeter portion into two unequal parts and the radial axis devides the counterweight into a first region above the radial axis, and into a second region below the radial axis, characterized in that the mass of the hub portion in the first region is equal to the mass of the hub portion in the second region, and the mass in the perimeter portion is axially distributed between the first and second regions such that the center of mass of the counterweight is located along the radial axis.