John Carswell may refer to:
Séon Carsuel (c. 1522 – 1572), Protestant reformer J. P. Carswell (John Patrick Carswell, 1918–1997), English civil servant and author John Carswell (bowls) (1887–?), Scottish international lawn bowler John Caswell (1654 or 1655 – 1712), sometimes John Carswell, English mathematician Douglas Carswell (John Douglas Wilson Carswell, born 1971), British Member of Parliament
See also Carswell, a surname