The Morgan Report was an 1894 report concluding an official U.S. Congressional investigation into the events surrounding the overthrow of the Hawaiian Kingdom, including the alleged role of U.S. military troops (both bluejackets and marines) in the overthrow of Queen Liliʻuokalani. Along with the Blount Report submitted in 1893, it is one of the main source documents compiling the testimony of witnesses and participants in the overthrow of the Hawaiian Kingdom in January 1893. The Morgan Report was the final result of an official U.S. Congressional investigation into the overthrow, conducted by the United States Senate Committee on Foreign Relations, whose chairman was Senator John Tyler Morgan, Democrat of Alabama.

The Report is formally named "Senate Report No. 227" of the 53rd Congress, second session, and dated February 26, 1894. It was printed as part of a large volume containing other government documents: "Reports of Committee on Foreign Relations 1789–1901 Volume 6."

The Blount Report had concluded that the U.S. Minister to Hawaii John L. Stevens carried out unauthorized partisan activities, including the landing of U.S. Marines under a false or exaggerated pretext, to support the anti-royalist conspirators and that these actions were instrumental to the success of the overthrow of the queen. The Morgan Report contradicted the Blount Report, finding all individuals involved in the overthrow – with the notable exception of Queen Liliʻuokalani – "not guilty". The Native Hawaiians Study Commission Report of 1993, commenting on the two competing reports, states: "The truth lies somewhere between the two reports."

The Morgan Report's submission in 1894 roughly coincided with the Turpie Resolution, which terminated Cleveland's efforts to restore the Queen. Cleveland accepted the conclusions of the Morgan Report, continued to engage in diplomatic relations with the Provisional Government, recognized the Republic of Hawaii upon its declaration on July 4, 1894, and even negotiated treaties originally ratified under the Kingdom government with the Republic.

The nine-member Senate Foreign Relations Committee that submitted the report could not agree on a final conclusion, and the oft-cited executive summary was signed only by Morgan himself. Other Republican members of the Committee, including Senators Sherman, Frye, Dolph, and Davis, generally agreed with the report, but refused to endorse the actions of Blount (who was appointed by President Cleveland, a Democrat). Democratic Senators Turpie, Butler, Daniel, and Gray did not endorse the approval of Minister Stevens' actions; while Butler and Turpie generally approved annexation, they refused to endorse the Morgan Report's conclusions because of the implications for internal disorder in Hawaii. Gray and Daniel were apparently outright opposed to annexation.

The Morgan Report was the final result of Cleveland's referral of the matter of the overthrow to Congress.

Cleveland from the Blount Report:

Though I am not able now to report a definite change in the actual situation, I am convinced that the difficulties lately created both here and in Hawaii and now standing in the way of a solution through Executive action of the problem presented, render it proper, and expedient, that the matter should be referred to the broader authority and discretion of Congress, with a full explanation of the endeavor thus far made to deal with the emergency and a statement of the considerations which have governed my action...