A local newspaper in Connecticut brought attention to the dozens of 'tribute' pages that had sprung up on the social network in the wake of 20 children and six adults losing their lives at the Newtown elementary school.
The family of one of the victims had expressed concern that some of the pages were being used to spread conspiracy theories.
The coverage led US Senators Richard Blumenthal and Chris Murphy, and Congresswoman Elizabeth Esty to write to Facebook chief executive Mark Zuckerberg last week asking him to take action.
Facebook said that it had responded to the situation by taking down the pages, and creating a special complaints process just for concerns relating to the Sandy Hook tragedy.
Hearst Connecticut Newspapers reported last week that the mother of Victoria Soto - the 27-year-old teacher who was killed while trying to defend the pupils - had tried unsuccessfully to get Facebook to delete the pages.
Donna Soto was concerned that the unofficial pages gave the appearance they were created by loved ones or friends, but some were soliciting donations supposedly for the victims, and others were claiming the worst elementary school shooting in American history was a hoax.
Following Facebook's move, she told GreenwichTime.com that she was "pleased that Facebook has agreed to do the right thing".
In a statement, Facebook confirmed that it would continue to assist police investigations and also co-operate with the office of Connecticut state attorney, General George Jepsen.
"We continue to work closely with his office, the families and the foundation representing the victims of Sandy Hook to ensure that we respond as quickly as possible to concerns," the social network said.
"We have also created a new, streamlined, customised process with dedicated staff to allow concerns specific to the Sandy Hook tragedy to be addressed directly and immediately, while also recognising that people across the country want to express grief for a terrible national tragedy.
"For the past few months, our rapid response team has acted swiftly to remove inappropriate materials flagged by the foundation and the families. We will continue to be vigilant."