It is Dumoulin's first grand tour win.
Climbing specialist Colombian Nairo Quintana (Movistar Team) had led the Giro going into the last day but lost out to the TT specialist Dumoulin.
It was tight at the top of the general classification going into Sunday as the four highest-placed riders were separated by just 53 seconds.
Here's the moment Dumoulin realized he'd won his first grand tour.
More to come.
De top 10 van de 100e Giro, met een Nederlander op plaats 1 #Giro100 pic.twitter.com/nOZm9l3I3I
- Sporza 🚴 (@sporza_koers) May 28, 2017
The moment @tom_dumoulin realized he won #Giro100. pic.twitter.com/QBSGBiO9Lb
- cyclingreporter (@cyclingreporter) May 28, 2017