Robert Daniel Zehr, Sr. (April 18, 1916 – August 4, 2001) was an American competition swimmer who represented the United States at the 1932 Summer Olympics in Los Angeles, California.

Japan dominated the swimming competition that year, taking the great majority of gold medals.

[6] He attended Northwestern University under Hall of Fame Coach Tom Robinson, beginning in the Fall of 1934, and graduating in 1938.

At the meet, Northwestern won the 1935 Big Ten Championship in Evanston at their home pool in the Patton Gymnasium.

[9] While swimming for Northwestern, he received All-American honors after winning the 1936 NCAA title in the 150 yard backstroke.

Zehr was one of thirteen All-American swim team members coached by Robinson, who was also inducted into the Northwestern Hall of Fame in 1984.