Category:Buildings and structures completed in the 21st century

• Airports established in the 21st century (4 C)
• Amusement rides introduced in the 21st century (27 C)
• Commercial buildings completed in the 21st century (6 C, 1 P)
• Dams completed in the 21st century (3 C, 1 P)
• Energy infrastructure completed in the 21st century (25 C)
• Event venues established in the 21st century (6 C)
• Fire stations completed in the 21st century (1 C)
• Government buildings completed in the 21st century (24 C)
• Hospital buildings completed in the 21st century (25 C)
• Houses completed in the 21st century (12 C, 2 P)
• Industrial buildings completed in the 21st century (11 C, 1 P)
• Infrastructure completed in the 21st century (7 C)
• Library buildings completed in the 21st century (21 C)
• Monuments and memorials completed in the 21st century (3 C)
• Music venues completed in the 21st century (24 C)
• Office buildings completed in the 21st century (3 C)
• Prisons completed in the 21st century (3 C, 2 P)
• 21st-century religious buildings and structures (22 C)
• Residential buildings completed in the 21st century (4 C, 2 P)
• Roller coasters opened in the 21st century (25 C)
• School buildings completed in the 21st century (3 C)
• Sports venues completed in the 21st century (3 C, 1 P)
• Theatres completed in the 21st century (3 C)
• Towers completed in the 21st century (4 C, 1 P)
• University and college buildings and structures completed in the 21st century (26 C, 1 P)

0–9

• Buildings and structures completed in the 2000s (22 C, 1 P)
• Buildings and structures completed in the 2010s (22 C, 1 P)
• Buildings and structures completed in the 2020s (19 C, 1 P)

M

• Military installations established in the 21st century (4 C)
• Museums established in the 21st century (4 C)