That's between January 2014 and December 2018.
The term 'Facebook' appeared in over 5,000 Humberside Police reports, between January 2014 and December 2018.
A Freedom Of Information request found mentions of the social media site, has risen by more than 330% since 2014.
In 956 cases of grooming, Facebook was used in a third cases recorded.
In response, a Humberside Police spokesman said: “As more of our lives are conducted online and in a digital way, it is unsurprising that crime reports involving Facebook and other social media sites have gone up.
“We have specialist officers in our Cyber Crime unit who are highly trained and investigate such crimes. We encourage anyone who may have any concerns to report it to us straight away.
“The use of technology and social media is not inherently dangerous and can be used in positive and constructive ways.
“With the increase in the number of reports mentioning social media it offers a timely reminder of the importance of adjusting privacy and security settings and, for example, not to use the same password for multiple accounts.
“By following simple guides such as ‘Get Safe Online’ and guidance given by the social media platform themselves, the user will be able to reduce the risk of becoming a victim.”
A spokesperson from Facebook and Instagram said:
“Child exploitation and grooming is not allowed anywhere on Facebook or Instagram. We use powerful technology to fight inappropriate content and accounts and work closely with child protection experts and law enforcement to help keep young people safe”