Sébastien Marsset

{{Short description|French offshore yachtsman}}

{{Infobox sailor

| name = Sébastien Marsset

| image = VG24_014_Sébastien_Marsset.jpg

| caption = At the start of the 2024-2025 Vendée Globe

| birth_date = {{Birth date and age|1984|12|15|df=yes}}

| birth_place =

| nationality = French

| occupation = Offshore Sailor

}}

Sébastien Marsset born 15 December 1984 is a French professional offshore sailor.{{Cite web|url=https://www.imoca.org/en/skippers-1/sebastien-marsset|title=IMOCA Profile - Sébastien Marsset|website=www.imoca.org}} He was a shore crew member and reserve sailor for Frank Cammas 2011-2012 Volvo Ocean Race with Groupama,{{Cite web|url=https://archive.theoceanrace.com/en/crew/469_Sebastien-Marsset.html|title=Sébastien Marsset|first=The Ocean|last=Race|website=The Ocean Race}} before competing in the next addition. He started of shorthanded offshore sailing in the Mini Class progressed the class 40 to achieve the following.