Promoted to rear admiral on 1 March 1703, Byng became third-in-command of the Mediterranean Fleet under Admiral Sir Cloudesley Shovell with his flag in the third-rate HMS Ranelagh later that month.
He led the bombardment squadron while serving under Admiral Sir George Rooke at the Capture of Gibraltar in August 1704 and then took part in the Battle of Málaga in August 1704.
Knighted on 22 October 1704, and promoted to vice admiral on 3 January 1705, he was elected Member of Parliament for Plymouth later that year.

Byng became Commander-in-Chief, Portsmouth, with his flag in the first-rate HMS Royal Anne, in late 1705 and then took part in the bombardment of Alicante in June 1706.
After taking part in the British defeat at the Battle of Toulon in July 1707 and, while sailing aboard his flagship HMS Royal Anne, Byng was present during the great naval disaster off the Isles of Scilly in October 1707 when Shovell and four of his ships were lost, claiming the lives of nearly 2,000 sailors.

Promoted to full admiral on 26 January 1708, Byng became Commander-in-Chief of the Mediterranean Fleet in January 1709 and went on to join the Board of Admiralty led by the Earl of Orford in November 1709.
Byng was advanced to Senior Naval Lord on the Admiralty Board in October 1710.
He stood down from the Admiralty Board in January 1714 but was reappointed, as Senior Naval Lord again, on Orford's return to the Admiralty in October 1714.

Byng took part in the suppression of the Jacobite rising by cutting off the Old Pretender's supplies in 1715 and for this he was created a baronet on 15 November 1715.
He was promoted to Admiral of the Fleet on 14 March 1718 and, with his flag in the second-rate HMS Barfleur, he was sent out as Commander-in-Chief of the Mediterranean Fleet to thwart any attempt by the Spanish to gain or to consolidate their position in Sicily.
He encountered the Spanish fleet at Naples and, after pursuing it down the Strait of Messina, sent ahead his fastest ships causing the Spanish fleet to split in two.
In the ensuing action on 11 August 1718, known as the Battle of Cape Passaro, the Spanish fleet was devastated: 10 ships of the line were captured, 4 ships of the line sunk or burnt and 4 frigates were captured at this early and critical stage of the War of the Quadruple Alliance.

Byng was then given power to negotiate with the various princes and states of Italy on behalf of the English crown.
Following his return to England, Byng became both Treasurer of the Navy and Rear-Admiral of Great Britain on 21 October 1720.
He was admitted to the Privy Council on 3 January 1721 and, having stepped down from the Admiralty Board in September 1721, was created Baron Byng of Southill in the county of Bedford, and 1st Viscount Torrington in Devon on 21 September 1721.
He developed his estate at Southill Park in Bedfordshire in the 1720s.

Byng was installed as a Knight Companion of the Order of the Bath on 17 June 1725 and appointed First Lord of the Admiralty during the Walpole–Townshend Ministry in August 1727; in this role he was instrumental in the establishment of the Royal Naval College at Portsmouth.
Promoted to rear admiral on 1 March 1703, Byng became third-in-command of the Mediterranean Fleet under Admiral Sir Cloudesley Shovell with his flag in the third-rate HMS Ranelagh later that month. He led the bombardment squadron while serving under Admiral Sir George Rooke at the Capture of Gibraltar in August 1704 and then took part in the Battle of Málaga in August 1704. Knighted on 22 October 1704, and promoted to vice admiral on 3 January 1705, he was elected Member of Parliament for Plymouth later that year.
Byng became Commander-in-Chief, Portsmouth, with his flag in the first-rate HMS Royal Anne, in late 1705 and then took part in the bombardment of Alicante in June 1706. After taking part in the British defeat at the Battle of Toulon in July 1707 and, while sailing aboard his flagship HMS Royal Anne, Byng was present during the great naval disaster off the Isles of Scilly in October 1707 when Shovell and four of his ships were lost, claiming the lives of nearly 2,000 sailors.
Promoted to full admiral on 26 January 1708, Byng became Commander-in-Chief of the Mediterranean Fleet in January 1709 and went on to join the Board of Admiralty led by the Earl of Orford in November 1709. Byng was advanced to Senior Naval Lord on the Admiralty Board in October 1710. He stood down from the Admiralty Board in January 1714 but was reappointed, as Senior Naval Lord again, on Orford's return to the Admiralty in October 1714.
Byng took part in the suppression of the Jacobite rising by cutting off the Old Pretender's supplies in 1715 and for this he was created a baronet on 15 November 1715. He was promoted to Admiral of the Fleet on 14 March 1718 and, with his flag in the second-rate HMS Barfleur, he was sent out as Commander-in-Chief of the Mediterranean Fleet to thwart any attempt by the Spanish to gain or to consolidate their position in Sicily. He encountered the Spanish fleet at Naples and, after pursuing it down the Strait of Messina, sent ahead his fastest ships causing the Spanish fleet to split in two. In the ensuing action on 11 August 1718, known as the Battle of Cape Passaro, the Spanish fleet was devastated: 10 ships of the line were captured, 4 ships of the line sunk or burnt and 4 frigates were captured at this early and critical stage of the War of the Quadruple Alliance.
Byng was then given power to negotiate with the various princes and states of Italy on behalf of the English crown. Following his return to England, Byng became both Treasurer of the Navy and Rear-Admiral of Great Britain on 21 October 1720. He was admitted to the Privy Council on 3 January 1721 and, having stepped down from the Admiralty Board in September 1721, was created Baron Byng of Southill in the county of Bedford, and 1st Viscount Torrington in Devon on 21 September 1721. He developed his estate at Southill Park in Bedfordshire in the 1720s.
Byng was installed as a Knight Companion of the Order of the Bath on 17 June 1725 and appointed First Lord of the Admiralty during the Walpole–Townshend Ministry in August 1727; in this role he was instrumental in the establishment of the Royal Naval College at Portsmouth.
George Byng, 1st Viscount Torrington