Joonas is an Estonian and Finnish given name and may refer to:
Joonas Alanne (born 1990), Finnish ice hockey player
Joonas Angeria (born 1989), Finnish music producer, songwriter and musician
Joonas Cavén (born 1993), Finnish basketball player
Joonas Donskoi (born 1992), Finnish ice hockey player
Joonas Granberg (born 1986), Finnish golfer
Joonas Hallikainen (born 1985), Finnish ice hockey player
Joonas Henttala (born 1991), Finnish racing cyclist
Joonas Hurri (born 1991), Finnish ice hockey player
Joonas Ikäläinen (born 1982), Finnish footballer
Joonas Jääskeläinen (born 1973), Finnish ice hockey player
Joonas Jalvanti (born 1988), Finnish ice hockey player
Joonas Järvinen (born 1989), Finnish ice hockey player
Joonas Kemppainen (born 1988), Finnish ice hockey player
Joonas Kokkonen (1921–1996), Finnish composer
Joonas Kolkka (born 1974), Finnish footballer
Joonas Komulainen (born 1990), Finnish ice hockey player
Joonas Korpisalo (born 1994), Finnish ice hockey player
Joonas Koskinen (born 1987), Finnish ice hockey player
Joonas Kuusela (born 1990), Finnish ice hockey player
Joonas Kylmäkorpi (born 1980), Finnish motorcycle speedway rider
Joonas Laurikainen (born 1983), Finnish footballer
Joonas Lehtivuori (born 1988), Finnish ice hockey player
Joonas Liimatainen (born 1991), Finnish ice hockey player
Joonas Lindgren (born 1986), Finnish sailor and Olympic competitor
Joonas Miquel (born 1997), Finnish ice hockey player
Joonas Myyrä (1892–1955), Finnish javelin thrower
Joonas Nättinen (born 1991), Finnish ice hockey player
Joonas Pöntinen (born 1990), Finnish footballer
Joonas Rask (born 1990), Finnish ice hockey player
Joonas Riekkinen (born 1987), Finnish ice hockey player
Joonas Ronnberg (born 1983), Finnish ice hockey player
Joonas Sammalmaa (born 1991), Finnish ice hockey player
Joonas Sarelius (born 1979), Finnish footballer
Joonas Tamm (born 1992), Estonian footballer
Joonas Toivanen (born 1991), Finnish ice hockey player
Joonas Vaino (born 1992), Estonian basketball player
Joonas Valkonen (born 1993), Finnish ice hockey player
Joonas Vihko (born 1981), Finnish ice hockey player
