Inge Dekker (born 18 August 1985) is a Dutch former competitive swimmer who specialised in butterfly and freestyle events. She won the bronze medal with the Dutch women's 4×100-metre freestyle relay team at the 2004 Summer Olympics in Athens, alongside teammates Inge de Bruijn, Marleen Veldhuis and Chantal Groot. At the 2008 Summer Olympics in Beijing, Dekker became Olympic champion in the 4×100-metre freestyle together with Ranomi Kromowidjojo, Femke Heemskerk and Marleen Veldhuis, setting a then Olympic record. At the 2012 Summer Olympics, she was part of the Dutch 4 x 100 metre freestyle team that won the silver medal, with Veldhuis, Heemskerk and Kromowidjojo, behind the Australian team who set a new Olympic record.
Dekker's younger sister Lia was also a member of the Dutch national swimming team.
In February 2016, Dekker was diagnosed with cervical cancer. In March, she had a successful surgery and she made the 2016 Summer Olympics, which were her fourth Olympics.