BLS metro-level wage data places Teaching Assistants, Except Postsecondary pay in Kennewick-Richland, WA at a median of $45,510 per year, drawn from the OEWS May 2025 release for this Metropolitan Statistical Area. Compared to the national median of $36,780, Kennewick-Richland pays +24% above, signaling either concentrated employer demand, a cost-of-living premium, or both. Approximately 2,450 teaching assistants, except postsecondarys are employed across the Kennewick-Richland MSA in SOC 25-9045.

The Kennewick-Richland pay distribution spans from $37,440 at the 10th percentile to $50,950 at the 90th — a 1.4× 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 $39,750 and the 75th at $46,680, so half of Kennewick-Richland-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 Kennewick-Richland, WA 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 WA data, and peer-metro comparisons — a median is a starting point, not a ceiling.