The Best Universities for PhDs in Agriculture in the USA (2026)

The USA is a global leader in agricultural research, offering PhD programmes that span plant science, animal science, soil ecology, food systems and more.

This guide showcases top American universities for PhD study in Agriculture using major international rankings, and explains what to consider when comparing research opportunities.

There are many reasons why someone might want to study Agriculture at a university in the USA. Here are just a few:

• Pursuing a PhD in Agriculture in the USA allows students to gain a deep understanding of modern agricultural practices, techniques, crop management and farm administration.
• The US has a wide range of career prospects once they complete their PhD, for example students can work as an Agro specialist adviser at agencies like USDA or Agribusiness firms.
• Many agricultural universities in the USA are globally recognised for their cutting-edge research and scholarly contribution to the field of Agriculture.
• Studying a PhD in the USA provides students with a chance to interact with peers from different cultural backgrounds, which enriches their understanding of international issues that impact global food production.

The following tables give the 10 top universities in the USA for Agriculture, according to global and local university rankings. It can show you which American universities are amongst the best in the world - and help you compare institutions on an international level.

This information is based on the latest rankings tables, researched and published by Times Higher Education, QS and Academic Ranking of World Universities (ARWU).

Each ranking system uses its own methodology, with different factors having more or less influence on a university's result.

Our guide has more information on how to use international rankings to decide on the best research universities for PhD study.

The Times Higher Education rankings are strong in academic focus and diverse teaching metrics, but do not include employer-specific metrics. Additionally, the rankings may not include all specialist institutions.

The QS World University Rankings are designed to meet the needs of prospective students, with more weight given to student-centric metrics such as staff/student ratio, international recruitment and employer opinion. The rankings are balanced between qualitative and quantitative data, but give less weight to research than some other rankings.

The ARWU rankings reflect the presence of elite academics and the future academic success of graduates. However, they do not directly assess the quality of education at a university or take into account other aspects of university performance.

Tips from the author

I hope this guide helps you see where agricultural research is especially active and impactful in the US. Rankings can help you spot strong departments, but the right choice also depends on your research focus — for example, crop genetics, sustainable systems or agricultural economics.

Reach out to potential supervisors and ask about ongoing projects, funding and lab culture before you apply — that early insight can be invaluable.