A prosecution official told Reuters the search is related to the scandal involving the president's friend, Choi Soon-sil, but declined to comment further.
South Korea's Yonhap News Agency reported prosecutors are looking into whether Samsung improperly provided financial assistance to Choi's daughter.
Samsung Electronics, reeling from a $5.4 billion profit hit after it was forced to discontinue its fire-prone Galaxy Note 7 smartphone, said prosecutors visited its office but declined to comment further.
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South Korea issues warrants for former presidential aides
Park's presidency has been rocked by the scandal involving Choi, who is alleged to have used her closeness to the president to meddle in state affairs and wield influence in the sports and cultural communities.
Choi has been charged abuse of power and fraud while a former aide has been charged with abuse of power and extortion after they helped raise 77.4 billion won ($68 million) from dozens of the country's biggest conglomerates on behalf of two foundations.
Prosecutors have been investigating an allegation that Samsung provided 2.8 million euros ($3.1 million) to a company co-owned by Choi and her daughter, who was previously a member of the South Korean national equestrian team, Yonhap reported.
Park Sang-jin, a Samsung Electronics president for corporate relations, is currently head of Korea Equestrian Federation. Yonhap said his office was part of the prosecutor's raid Tuesday morning. Park Sang-jin could not immediately be reached for comment.
Prosecutors have already questioned a Samsung executive as part of the probe, according to a prosecution source.
Yonhap reported prosecutors were also raiding the offices of the Korea Equestrian Federation and the Korea Horse Affairs Association.
The Korea Equestrian Federation declined to comment on Yonhap report, and the Korea Horse Affairs Association did not immediately comment.
Park to parliament
Park will visit parliament on Tuesday and meet the speaker to discuss how to resolve the political crisis, an official at her office told Reuters.
Park also hopes to meet the leaders of opposition parties, Yonhap quoted her spokesman as telling reporters.
Opposition leaders have demanded Park withdraw her nominee for prime minister and agree to a candidate acceptable to them as a precondition to meeting her to discuss a solution to the crisis that has thrown her government into limbo.
Park has publicly apologised twice for the scandal but her approval rating has plunged to 5 percent according to a Gallup poll released on Friday, the lowest since such polling began in 1988.
No South Korean president has failed to finish their five-year term, but Park has faced growing pressure from the public and some hardline political opponents to quit.
Park's term is due to end in early 2018 and the main opposition parties have not raised the idea of launching impeachment proceedings.
