Sundby may refer to:

• Sundby, Copenhagen, a district in Copenhagen
• Sundby, Lolland, a satellite town of Nykøbing Falster on Lolland
• Nørresundby, a town on North Jutlandic Island

• Sundby, Sweden, a locality on Ekerö in Stockholm County
• Sundbyberg Municipality, Sweden

• Martin Johnsrud Sundby, Norwegian cross-country skier
• Ragnhild Sundby (1922–2006), Norwegian zoologist

This disambiguation page lists articles associated with the title Sundby.
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