BLS metro-level wage data places Teaching Assistants, Except Postsecondary pay in Santa Rosa-Petaluma, CA at a median of $48,270 per year, drawn from the OEWS May 2025 release for this Metropolitan Statistical Area. Compared to the national median of $36,780, Santa Rosa-Petaluma pays +31% above, signaling either concentrated employer demand, a cost-of-living premium, or both. Approximately 1,930 teaching assistants, except postsecondarys are employed across the Santa Rosa-Petaluma MSA in SOC 25-9045.

The Santa Rosa-Petaluma pay distribution spans from $39,080 at the 10th percentile to $59,460 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 $45,330 and the 75th at $58,090, so half of Santa Rosa-Petaluma-based teaching assistants, except postsecondarys 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 Santa Rosa-Petaluma, CA 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 CA data, and peer-metro comparisons — a median is a starting point, not a ceiling.