- Mar 2 Carl Gustaf Pilo, Swedish-born artist
- Mar 4 Isaac Ouwater, Amsterdam painter and cartoonist, dies at 44
- Mar 20 William Murray, 1st Earl of Mansfield, Scottish judge and politician (b. 1705)
- Mar 21 Johann Michael Schmidt, composer, dies at 51
- Mar 26 John Mudge, English physician (telescope mirrors) (b. 1721)