An investigation by the FBI's Art Crime Team determined that all artefacts had been illicitly trafficked from Egypt, reported CBS News.
The items, which include carved figures, amulets and tomb equipment, date from the Pharaonic, Roman and Coptic periods.
The FBI said the original suspected trafficker is now dead.
The artefacts were returned after their most recent possessor contacted the FBI following research that raised questions about how the items had entered the United States.
An analysis found no records showing that the artefacts had been lawfully removed from Egypt.
Ambassador Hossam Eldeen Aly, consul general of Egypt in Los Angeles, thanked the US government for returning the artefacts.
"These handed-over artefacts represent an integral part of the history and cultural heritage of Egypt and its people, and we are very glad and honoured to bring those home," he was quoted as saying.
The repatriation comes under a 2016 cultural property agreement between Egypt and the United States that restricts the import into the US of certain archaeological and ethnological materials from Egypt.
The agreement provides a framework for cooperation between the two countries to identify, intercept and return trafficked cultural property, while facilitating lawful exchanges for cultural, educational and scientific purposes, according to the FBI.
Egypt has stepped up efforts to recover antiquities illegally removed from the country, working with foreign governments, law enforcement agencies and international organizations to secure their return.
It established the National Committee for the Repatriation of Stolen and Smuggled Antiquities in 2008, with the committee later reconvened in 2016 after a six-year hiatus to develop a strategy for recovering artefacts taken illegally out of Egypt.
The committee brings together representatives from the ministries of tourism and antiquities, foreign affairs and justice, as well as the Public Prosecution and other relevant authorities.
Egypt has since recovered thousands of artefacts from several countries, including the United States, France, Spain, Germany, Italy, the Netherlands and Australia.
In 2024, authorities said that around 30,000 artefacts had been repatriated from various countries since 2011, while more recent recoveries have continued through cooperation between Egyptian authorities and their international counterparts.
According to CBS News, US law enforcement agencies have returned more than 5,000 cultural artefacts to Egypt over the past decade.
The FBI said some cases result in prosecutions, while in others the statute of limitations has expired. Regardless, recovered objects are returned to their country of origin.
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