Ol' Man River
Mar 1 Paul Whiteman and His Orchestra record "Ol' Man River" for Victor Records featuring Bing Crosby
- Mar 4 "Bunion Run" race from LA to NYC begins; It is won by Andy Payne
- Mar 5 Karl Zuckmayer's "Der Hauptmann von Köpenick" premieres in Berlin
- Mar 10 Christine Collins' son, Walter Collins, disappears in Los Angeles
- Mar 12 In California, the St. Francis Dam fails, killing over 600 people
- Mar 13 Rudolph Friml's musical "Three Musketeers" premieres in NYC
Mussolini's Electoral Changes
Mar 15 Benito Mussolini modifies Italy electoral system (abolishes right to choose)
- Mar 19 "Amos & Andy" debuts on radio (NBC Blue Network-WMAQ Chicago)
This Year of Grace
Mar 22 Noël Coward's musical "This Year of Grace" premieres in London
- Mar 27 KGB-AM in San Diego CA begins radio transmissions
- Mar 27 US Ladies' Figure Skating championship won by Maribel Vinson
- Mar 29 Yeshiva College (now University) chartered (NYC)
- Mar 30 87th Grand National: Mr. William Dutton aboard 100/1 long-shot Tipperary Tim wins as all of the 41 other starters fall during the race
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