Morris Fidanque de Castro

In 1954, de Castro resigned as governor. He was given the Department of the Interior's Distinguished Service Medal in recognition of his efforts. However, instead of retirement, he returned to work in the financial department of the territory for subsequent governors. At his death in 1966, he was the budget director for Governor Ralph M. Paiewonsky.

However, during his term, de Castro was forced to make concessions which were not universally popular. In 1953, he rescinded his previous remarks that the territory should elect its own governor. Instead, he clarified that it should only elect its own governors when they were self-sufficient, and not sooner. De Castro also worked to revamp the territorial's treasury. Under the old system, taxes collected in Saint Thomas could not be used to help those in Saint Croix, and vice versa. He pushed for a single unified treasury that could benefit all of the islands. This position was unpopular due to the locals not wanting the wealth of Saint Thomas being used to shore up the poorer islands.

In 1944, he was promoted from Commissioner of Finance to an assistant to Governor Charles A. Harwood. In 1945, he was made government secretary and held that position until he was appointed full governor by President Harry S. Truman on February 28, 1950. (He was inaugurated March 4.) Though he was aware that he was under consideration for the position (he had been again made acting governor in the interim), he did not campaign for it though he indicated that he would take it, if offered. De Castro's appointment was considered by many as a symbol that the United States wanted increased self-government for its territories.

In 1939, de Castro was briefly made acting governor while Lawrence William Cramer was attending hearings in Washington, D.C.. This role usually fell to the government secretary, such as Robert Herrick in 1935, but de Castro given the position instead. During his brief tenure, the United States Virgin Islands was honored by an "unofficial" state visit by Frederick IX of Denmark, then still the Crown Prince, and his wife, Ingrid of Sweden. Over the years, de Castro continued to be a prominent choice whenever an acting governor was necessary.

De Castro was born in Panama City, Panama. Although he was Jewish, de Castro attended Roman Catholic High School of St. Thomas. His father was merchant David de Castro and his mother was Adah Fidanque. Immediately after graduating high school, de Castro obtained a job working as a clerk in the island's sanitation office. Over the years, de Castro remained in government and gradually rose through the ranks until he was appointed as the Commissioner of Finance in 1934.

Morris Fidanque de Castro (February 5, 1902 – December 9, 1966) was the first native Governor of the United States Virgin Islands and a lifetime government servant for the territory.