BLS metro-level wage data places First-Line Supervisors of Police and Detectives pay in Northwest Illinois nonmetropolitan area at a median of $94,050 per year ($45.22/hr/hour), drawn from the OEWS May 2025 release for this Metropolitan Statistical Area. Compared to the national median of $106,040, Northwest Illinois nonmetropolitan area pays 11% below, which typically tracks with a lower local cost of living or smaller specialized-employer cluster. Approximately 120 first-line supervisors of police and detectivess are employed across the Northwest Illinois nonmetropolitan area MSA in SOC 33-1012.

The Northwest Illinois nonmetropolitan area pay distribution spans from $66,390 at the 10th percentile to $105,110 at the 90th — a 1.6× 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 $84,500 and the 75th at $101,490, so half of Northwest Illinois nonmetropolitan area-based first-line supervisors of police and detectivess 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 Northwest Illinois nonmetropolitan area 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 IL data, and peer-metro comparisons — a median is a starting point, not a ceiling.