According to Orbit's 2026 salary analysis, the average Machine Learning Engineer salary in St. Louis is $140,000. Salaries range from $108,000 (25th percentile) to $180,000 (75th percentile), adjusted for St. Louis's cost of living.
St. Louis offers one of the most affordable major metro areas in the country, with a strong base in healthcare, financial services, and manufacturing. The region's anchor employers include Boeing, Centene, and Washington University's medical campus. A growing biotech and plant sciences corridor centered on the Cortex Innovation District is attracting new investment and talent.
What drives Machine Learning Engineer salaries
Production ML experience, deep learning framework fluency, and ability to optimize models for scale are the strongest differentiators. Engineers who bridge research and production by deploying models that serve millions of predictions per day command significant premiums. Specialization in recommendation systems, search ranking, or fraud detection adds further value.
Beyond base salary
Total compensation
Equity at AI focused companies adds $30,000 to $150,000+ annually. Bonuses of 10 to 20% are standard. Signing bonuses of $25,000 to $75,000 are common at well funded firms. Benefits frequently include GPU compute budgets, conference sponsorship, and research publication support.
Tax considerations in St. Louis
Missouri's top income tax rate is about 4.8%, and St. Louis City adds a 1% earnings tax. The low base cost of living means your after tax salary still stretches further than in most metros.
Career progression
Entry level ML engineers start at $110,000 to $140,000, reaching mid level at $145,000 to $190,000 in two to three years. Senior ML engineers earn $190,000 to $260,000. Staff ML engineers at top companies exceed $350,000 in total compensation, with research oriented roles paying even more.
Emphasize your willingness to work in person at Cortex or the BJC campus. St. Louis employers offer higher packages for candidates who commit to the local innovation hubs.
Machine Learning Engineer salary FAQ
A master's degree is nearly standard for ML engineering roles and typically adds $15,000 to $25,000 in starting salary. A PhD opens research focused positions paying $200,000+ at entry level. However, demonstrated ability to ship production ML systems can substitute for formal academic credentials.
ML engineers at AI native companies (OpenAI, Anthropic, DeepMind) earn 20 to 40% more than counterparts at traditional tech firms. The premium reflects both the specialized nature of the work and intense competition among AI labs for a limited pool of qualified candidates.
According to Orbit's 2026 salary analysis, the average Machine Learning Engineer salary in St. Louis, MO is $140,000. Entry level positions start around $108,000, while experienced professionals earn up to $180,000 or more depending on skills, company size, and industry.
Machine Learning Engineer salaries in St. Louis have been trending upward due to strong demand and competitive hiring. The current range of $108,000 to $180,000 reflects 2026 market conditions. Salary growth varies by specialization, with high demand skills commanding premium compensation increases year over year.
St. Louis offers competitive compensation for Machine Learning Engineers relative to its cost of living. The local job market, industry presence, and quality of life all factor into whether St. Louis is the right fit. Consider using Orbit's Salary Playbook to compare offers across cities and factor in your personal financial situation.
Entry level Machine Learning Engineer positions in St. Louis typically start around $108,000 or slightly below, depending on the company and your educational background. Candidates with relevant internships, certifications, or portfolio projects can often negotiate toward the median of $140,000.