Engine and Other Machine Assemblers in St. Louis

BLS metro-level wage data places Engine and Other Machine Assemblers pay in St. Louis, MO-IL at a median of $51,920 per year ($24.96/hr/hour), drawn from the OEWS May 2025 release for this Metropolitan Statistical Area. Compared to the national median of $53,710, St. Louis pays 3% below, which typically tracks with a lower local cost of living or smaller specialized-employer cluster. Approximately 120 engine and other machine assemblerss are employed across the St. Louis MSA in SOC 51-2031.

The St. Louis pay distribution spans from $42,240 at the 10th percentile to $63,200 at the 90th, a 1.5× 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 $45,340 and the 75th at $62,460, so half of St. Louis-based engine and other machine assemblerss 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.