BLS metro-level wage data places Library Assistants, Clerical pay in Portland-South Portland, ME at a median of $39,600 per year ($19.04/hr/hour), drawn from the OEWS May 2025 release for this Metropolitan Statistical Area. Compared to the national median of $36,910, Portland-South Portland pays +7% above, signaling either concentrated employer demand, a cost-of-living premium, or both. Approximately 180 library assistants, clericals are employed across the Portland-South Portland MSA in SOC 43-4121.

The Portland-South Portland pay distribution spans from $37,510 at the 10th percentile to $50,380 at the 90th — a 1.3× 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 $38,150 and the 75th at $46,330, so half of Portland-South Portland-based library assistants, clericals 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 Portland-South Portland, ME 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 ME data, and peer-metro comparisons — a median is a starting point, not a ceiling.