Thomas Charles Reginald Agar-Robartes (22 May 1880 – 30 September 1915) was a British Liberal politician.
Tommy Agar-Robartes was the eldest son and heir of Thomas Agar-Robartes, 6th Viscount Clifden, and his wife Mary (née Dickenson) and was brought up at Lanhydrock House, Bodmin. He was elected a Member of Parliament for Bodmin in the 1906 general election, but lost his seat in June 1906 following a controversial election petition by the defeated candidate alleging illegal payments to potential voters. He was elected to the St Austell Division of Cornwall in a by-election in 1908 and held the seat until his death.
At the outbreak of World War I he joined the Royal Bucks Hussars as an officer. Tommy then joined the Coldstream Guards and was subsequently posted to France & Flanders. Captain The Honourable Thomas Charles Reginald Agar-Robartes, in command of No. 2 Coy, 1st Bn, the Coldstream Guards, was wounded in the Battle of Loos on 28 September and killed by a sniper on 30 September 1915 after rescuing a wounded comrade under heavy fire for which he was recommended for the Victoria Cross.
He is buried in Lapugnoy Military Cemetery, near Béthune. He is commemorated by a memorial in Truro Cathedral and in stained glass at Wimpole and Church Norton. His younger brother Francis later succeeded their father in the viscountcy.