Joaquim Coutiho, 92, who taught geopolitics, Portuguese, and geography at Georgetown University for nearly 50 years, died Saturday at Doctors Hospital in Washington. He had suffered from a kidney ailment.

Dr. Coutinho was a founding faculty member of Georgetown's Foreign Service School in 1919. He had also taught Portuguese at George Washington University and lectured in economics at Catholic University.

From 1953 to 1956, he taught at the University of Madrid and helped established a "junior year abroad" program there for Georgetown students.

Although he retired from Georgetown as a full professor in 1953, he continued to lecture and lead seminars there as a professor emeritus until 1969.

Dr. Coutinho was born in Lisbon, Portugal, and earned a bachelor's degree in civil engineering and a doctorate at the Lisbon University of Technology.

After additional work at Oxford University and the University of London, he entered Portuguese government service and came to this country in 1916 as a commercial attache with the Portuguese Embassy.

He later worked for a short time for the Pan-American Union before he began to teach.

Dr. Coutinho was the coauthor of "A Portuguese Grammar," published in 1925.

He held medals and decorations from the Holly See, the portuguese Red Cross, the governments of Ecuador and Portugal and the Pan-American Medal from the United States.

Dr. Coutinho was a member of the American Historical Society, the Modern Language Association, the Royal Geographical Society of Madrid, the Oxford Society and the National Press Club.

He is survived by a son, Dr. John, of Aberdeen, Md., a daughter, Dr. Helen, of Washington; two grandchildren; and three great-grandchildren.