Thomas Owusu Mensah (1950 – 27 March 2024) was a Ghanaian-American chemical engineer and inventor who contributed to the development of fiber optic manufacturing and nanotechnology.

[3] In 2017, Mensah served as editor-in-chief of the textbook Nanotechnology Commercialization, published by John Wiley & Sons.

[1] Mensah attended Adisadel College in Cape Coast, Ghana, and completed his undergraduate studies in chemical engineering at Kwame Nkrumah University of Science and Technology in Kumasi.

[7] On 24 February 2017, WTOC-TV News ran a segment for Black History Month about Mensah's work on fiber optics and its impact on the internet.

[7] Mensah was president and CEO of Georgia Aerospace Systems, which manufactures nanocomposite structures used in missiles and aircraft for the US Department of Defense.

[3] Mensah was chairman of Entertainment Arts Research Inc, a virtual reality and video game design company.

In the first quarter of 2015, the government of the U.S. state of Georgia passed a House Resolution to commend Mensah and his works.