On 1 January 1916, Ainsworth was awarded the
Distinguished Service Order (DSO) "for distinguished service in the Field". In January 1919, he was awarded the
Médaille des Épidémies (en
Vermeil) by the President of the French Republic "for distinguished services rendered during the course of the campaign". In the 1923
King's Birthday Honours, Ainsworth was appointed an
Officer of the Order of the British Empire (OBE). In June 1934, he was appointed an Officer of the
Venerable Order of St John (OStJ). In the 1935 King's Birthday Honours, he was appointed a
Companion of the Order of the Bath (CB) in recognition of his service as
Commandant of the
Royal Army Medical College. In December 1941, he was promoted to Commander of the Venerable Order of St John (CStJ). In the 1946
New Year Honours, Ainsworth was appointed a
Knight Bachelor (Kt) in recognition of his role as Director of Medical Services of the Joint War Organization. On 12 March 1946, he was knighted by
King George VI during a ceremony at
Buckingham Palace. On 23 December 1946, he was promoted to Knight of the Venerable Order of St John (KStJ). ==Personal life==