Paris police officials said the arrests took place starting in different locations in the Paris region and the south of France. The suspects, ages 23 to 72, were already known for prior robberies and other crimes, according to one official.
Multiple firearms, including an automatic pistol, and 140,000 euros (USD 147,500) in cash were found during the raids, the official said.
The police sources spoke on condition of anonymity because they were not allowed to speak publicly about the continuing investigation.
The suspects can be held for up to 96 hours before police must either charge them or let them go.
More From This Section
Jean Veil, the French lawyer for Kardashian West, said the news of arrests is "a great satisfaction." "These arrests are a nice surprise because we might be able to find the jewels," Veil told the French magazine L'Express Monday.
On October 3, robbers forced their way into the private Paris residence where Kardashian West was staying, tied her up, held her at gunpoint and then locked her in a bathroom before making off with her jewelry. The reality TV star was in Paris attending fashion week shows.
Media reports said police tracked down the suspects through DNA evidence found at the apartment. One official, also speaking on condition of anonymity, said many were already known for robbery and other crimes.
Earlier this month, the starlet broke her silence on the robbery in a teaser for the family's reality show, telling two of her sisters her thoughts at the time: "They're going to shoot me in the back. There's no way out."
Police analysed footage from surveillance cameras to try to identify the assailants, who wore fake police emblems on their jackets.