Dalin is a Swedish surname. The name may also appear as Dahlin (surname). Both surnames are derived from the Swedish word dal meaning valley. Dalin may refer to:
- Dalin, Chiayi, a township in Chiayi County, Taiwan
- Dalin Station, a railway station, Chiayi County, Taiwan
- Dalin Tollestrup, Canadian football player, 2011 Edmonton Eskimos season
- David G. Dalin (born 1949), Jewish American historian
- Kalle Dalin (born 1975), Swedish orienteering competitor and European champion
- Liu Dalin (born 1932), Chinese sexologist
- Per Dalin (1936–2010), Norwegian educationalist
- Olof von Dalin (1708–1763), Swedish poet
- Wen Dalin (575–637), Tang dynasty politician
- Dalin Myślenice, a Polish women's volleyball team known as "Dalin", based in Myślenice