BLS metro-level wage data places Molding, Coremaking, and Casting Machine Setters, Operators, and Tenders, Metal and Plastic pay in St. Louis, MO-IL at a median of $44,370 per year ($21.33/hr/hour), drawn from the OEWS May 2025 release for this Metropolitan Statistical Area. Compared to the national median of $44,350, St. Louis pays same as, signaling either concentrated employer demand, a cost-of-living premium, or both. Approximately 1,640 molding, coremaking, and casting machine setters, operators, and tenders, metal and plastics are employed across the St. Louis MSA in SOC 51-4072.

The St. Louis pay distribution spans from $33,290 at the 10th percentile to $62,010 at the 90th — a 1.9× spread that reflects experience tenure, specialization, employer size, and the difference between public-sector, nonprofit, and private-sector compensation inside the metro. The 25th percentile sits at $38,430 and the 75th at $56,750, so half of St. Louis-based molding, coremaking, and casting machine setters, operators, and tenders, metal and plastics earn within that middle band.

Metro figures capture where you actually work, not just where you live — which matters for commuters. BLS draws metro boundaries from the OMB MSA definitions, so St. Louis, MO-IL covers the central city plus outlying counties tied to the metro economically. Remember that OEWS wages reflect base pay only: employer-provided health insurance, retirement matches, stock options, signing bonuses, overtime, and tips are excluded and can add 20-40% to real total compensation. Before using this metro median as a negotiation anchor, triangulate against the same occupation's national profile (linked below), its state-wide MO data, and peer-metro comparisons — a median is a starting point, not a ceiling.