Sundby

Sundby may refer to:

Denmark

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

Sweden

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

People with the surname

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