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This is a list of notable Sri Lankan American citizens, including both original immigrants who obtained American citizenship and their American descendants, but does not include Sri Lankan nationals living or working in the U.S. The list includes a brief description of the reason for their notability.

• Rohan Abeyaratne – academic and engineer
• Athula Attygalle – professor in mass spectrometry
• Ananda Coomaraswamy – philosopher
• Sarath Gunapala – solid-state physicist, senior research scientist and group supervisor at NASA's Jet Propulsion Laboratory
• Shelton Gunaratne – Professor Emeritus of Mass Communications at Minnesota State University Moorhead
• Ratnajeevan Hoole – professor in Electrical and Computer Engineering at Michigan State University
• Curuppumullage Jinarajadasa – freemason, theosophist and president of the Theosophical Society Adyar
• Nalin Kulatilaka – Professor of Finance at School of Management
• Patrick Mendis – educator, diplomat, author, and executive in US government service
• Anura C. Perera – science writer, astronomer
• Nalin Samarasinha – astronomer, first Sri Lankan to have an asteroid named after him
• Stanley Jeyaraja Tambiah – Esther and Sidney Rabb Professor of Anthropology, Emeritus, Harvard University
• Siva Sivananthan – professor, scientist and Director of the Microphysics Laboratory at the University of Illinois
• Sam Weerahandi – former professor; the first ASA Fellow of Sri Lankan origin

• Raj Barr-Kumar – former president of the AIA

• Anne Cherubim – painter
• Fabianne Therese - actor

• Namal Nawana – CEO of Smith & Nephew
• Raj Fernando – chairman and CEO of Scoutahead.com and philanthropist
• Sanjay Kumar – businessman
• Kumar Mahadeva – entrepreneur and CEO
• Chamath Palihapitiya – venture capitalist, software developer
• Raj Rajaratnam – founder of Galleon Group, a New York-based hedge fund management firm, convicted of insider trading
• Bandula Wijay – inventor, businessman, and diplomat. Invented "Nested Loop" vascular stent.

• Thushari Jayasekera – actress, writer, emcee, and performance artist; with her role on NBC's Outsourced (2010-2011), she is the first American actress of Sri Lankan origin to play a principal role in a primetime show on a major American TV network
• Chandran Rutnam – film director, producer, screenwriter
• Fabianne Therese – actress, director
• Maya Stojan - actress
• Bernard White – actor, screenwriter, film director
• Gina Zamparelli – Los Angeles-based concert promoter, daughter of Maureen Hingert
• Sanjit De Silva – actor, known for roles in The Company Men and American Desi

• John Kingsman Beling – Rear Admiral of the United States Navy

• DeLon – rapper and record producer; first Sri Lankan-American to appear on the Billboard charts^[1][2]
• Clarence Jey – US Billboard and Grammy-credited record producer and songwriter^[3][4]
• Ranidu Lankage – rapper
• Ruwanga Samath – record producer and the president of The Bird Call Productions

• Basil Rajapaksa – former Member of the Sri Lankan Parliament
• Gotabaya Rajapaksa – 8th President of Sri Lanka; US citizen from 2003 to 2019

• Visvanathan Rudrakumaran – chairman of the Transnational Government of Tamil Eelam, a pro-LTTE (Liberation Tigers of Tamil Ealam) organization (the LTTE has been described as a terrorist organization by the US, the European Union and many other countries)

• Bawa Muhaiyaddeen – teacher and Sufi mystic
• Witiyala Seewalie Thera – founder/president and abbot of the Minnesota Buddhist Vihara, Deputy Chief Sangha Nayaka of North America

• Danielle de Niese – opera singer
• Sean Panikkar – opera singer
• Tharanga Goonetilleke – opera singer

• Nagalingam Ethirveerasingam – Olympian for 1952 and 1956 Olympic Games
• Barney Henricus – 1938 British Empire Games boxing gold medallist
• Christine Sonali Merrill – Olympian for 2012 Olympic Games, engineer
• Roy Silva – cricketer who has represented the US in Twenty20 International
• Tiana Sumanasekera – member of the U.S. national gymnastics team
• Sunil Weeramantry – chess trainer, author

• Indran Amirthanayagam – author
• V. V. Ganeshananthan – fiction writer, essayist, and journalist
• Patrick Mendis – educator, diplomat, author, and executive in US government service
• Mary Anne Mohanraj – speculative fiction writer and editor who helped found Strange Horizons^[5]
• Nayomi Munaweera – author
• Leah Lakshmi Piepzna-Samarasinha – poet, writer, educator, social activist
• Romesh Ratnesar – journalist, author
• Rosemary Rogers – best-selling author of romance novels in the US; has been on the New York Times best-sellers list
• Sunil Yapa – fiction writer, author of Your Heart Is a Muscle The Size of a Fist (2016), which he promoted as a guest on Late Night with Seth Meyers

• Rifqa Bary – author, subject of the Rifqa Bary controversy
• Natalie and Nadiya Anderson – twin sisters who had competed in The Amazing Race and Survivor
• Upeshka De Silva – professional poker player

• List of Sri Lankans