Credits required
45 Oregon State University is on a quarter-term system. There are four quarters each year and classes are 11 weeks long. This program's 45 quarter credits are equal to 30 semester credits.*
Cost per credit
$571 Based on current tuition rates. No additional charge for nonresident students. Does not include course materials and associated fees and expenses.
Online You can complete all or nearly all requirements of this program online. View the curriculum.
Start terms
4 per year

Professional Science Master's in Environmental Sciences – Online

Admissions requirements

  • Bachelor's degree with a minimum cumulative 3.0 GPA for regular admission
  • GRE: not required
  • For the Master of Science degree program: A commitment from a major professor is required for admission but not to apply

When to apply

Both the M.S. and PSM degree programs allow you to start during the fall, winter, spring or summer terms.

You should start your application no fewer than 30 days prior to the academic term that you intend to matriculate.

How to apply

Apply to the OSU Graduate School

1. Apply as a degree-seeking student through the OSU Graduate School’s online application form. The nonrefundable application fee is $75.

2. Submit official transcripts from all colleges and universities attended.

NOTE: Although the Graduate School application is submitted online electronically – and all of the documentation (scores, transcripts, etc.) can be uploaded as attachments – some students may choose to mail their documentation. Accompanying materials can be mailed to the Graduate School (Heckart Lodge, 2900 SW Jefferson Way, Corvallis, OR, 97331).

You DO NOT have to mail AND submit your documents electronically.

Apply to the Master of Science or Professional Science Master’s in Environmental Sciences programs

1. Submit a cover letter. Request admission to the program with a statement of objectives, a description of your professional and educational experience, and why you seek admission into the program.

2. Submit three professional references. Provide the names and email addresses of three individuals who will supply letters of professional reference on your behalf. These individuals will be contacted directly by the OSU Graduate School and asked to independently upload their letters.

3. Submit a current CV or résumé. Provide a summary of your education, experience, publications, presentations and other relevant information.

4. Optional: Upload any additional relevant information such as writing samples, special circumstances or specific information in support of our holistic approach to admissions.

NOTE: International applicants must also submit documents and language test scores that are outlined on the graduate admissions international applicants webpage. The Graduate School suggests that international applicants apply at least 90 days prior to the start of the term. However, applications from international students may be accepted up to 30 days prior to the start of the term.

Nondegree-seeking students

You may apply to Oregon State as a nondegree-seeking graduate student. Nondegree-seeking students who may later wish to apply to the M.S. or PSM in Environmental Sciences degree programs or a different graduate program should note that up to 22 graduate credits may be transferred toward a 45-credit master's degree.

Certificate-seeking students

Credits earned from courses in graduate certificate programs may be applied toward the M.S. or PSM degree in environmental sciences. Students may be enrolled in both programs simultaneously. Please note: Up to 22 graduate credits may be transferred toward a 45-credit master's degree.


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