Adolfas is a masculine Lithuanian given name, derived from the German Adolf. Notable people with the name include:

• Adolfas Akelaitis (1910–2007), Lithuanian high jumper
• Adolfas Aleksejūnas (born 1937), Lithuanian middle-distance runner
• Adolfas Jucys (1904–1974), Lithuanian theoretical physicist and mathematician
• Adolfas Mekas (1925–2011), Lithuanian film director, and brother of Jonas Mekas
• Adolfas Ramanauskas (1918–1957), American-born Lithuanian anti-Soviet partisan
• Adolfas Šleževičius (1948–2022), former Prime Minister of Lithuania
• Adolfas Tautavičius (born 1925), Lithuanian archaeologist and Habilitated Doctor
• Adolfas Urbšas (1900–1973), Lithuanian and Soviet military officer
• Adolfas Valeška (1905–1994), Lithuanian stained glass artist, painter, stage designer, and museum director
• Adolfas Varanauskas (1934–2007), Lithuanian shot putter
• Adolfas Večerskis (born 1949), Lithuanian movie and stage actor, director and translator