Vlk (feminine Vlková) is a Czechoslovak surname (meaning wolf). People with the surname Vlk include:

• František Vlk (1925–2003), Czech footballer
• Jaromír Vlk (born 1949), Czech shot putter
• Lubomír Vlk (born 1964), Czech footballer
• Miloslav Vlk (1932–2017), Czech Archbishop and cardinal
• Petr Vlk, Czech ice hockey player
• Přemysl Vlk (1981/82–2003), Czech slalom canoer
• Vladimír Vlk (born 1968), Slovak ice hockey player