"A cyclist has been involved in a collision with a white van. The rider was taken to hospital with relatively minor rib injuries, possible fractures," Lancashire Police said.
Police were alerted to the incident in Wrightington at 6pm after reports of a road traffic accident.
Wiggins, 32, often rides the roads near his home where he lives with his wife and two children.
"His family are aware," said police, adding they had spoken with the van's driver.
Wiggins became the first Briton to win the Tour de France in July with Team Sky.
"He is being kept in hospital overnight for observation but the injuries he has sustained are not thought to be serious and he is expected to make a full and speedy recovery," Team Sky said.