Fitzwilliam Lawn Tennis Club is a tennis and squash club in south Dublin, Ireland. Established in 1877, Fitzwilliam is one of the oldest tennis clubs in the world.^[1] It has held the Irish Open annually since the late 19th century.

In November 1877 ten men met to found the Dublin Lawn Tennis Club.^[2] This club was to initially consist of 30 members each paying an annual subscription of three pounds.^[3] They next met on 23 November 1877 and discussed leasing grounds in Upper Pembroke Street near to Fitzwilliam Square, Dublin, Ireland owned by Sir Francis Brady a judge on a lease of ten years for a rent of twenty five pounds per year.^[4] On 6 December 1877 another meeting was convened and the committee assembled and agreed to adopt the name Fitzwilliam Lawn Tennis Club as recommended by one of its members.^[5] In 1879 the Fitzwilliam Lawn Tennis Club staged its first Irish Lawn Tennis Championships at Wilton Square which remained the host location of that event until 1903.^[6]

In 1880 the club had reached the point where there was not enough room for expansion at its current location.^[7] The club therefore purchased available land at Wilton Place and a building No. 6 Wilton Place that was converted to serve as the club's premises, in addition tennis courts were also constructed.^[8] In 1902 the club decided to build a pavilion at the club grounds which was financed through the sale of No 6 Wilton Place.^[9]

In 1903 the Irish Championships venue was moved from Fitzwilliam Square to Wilton Place.^[10]

• AIG Irish Open Championships (2017–present).^[19][20]

The Fitzwilliam Lawn Tennis Club has organised many notable tournaments throughout the years.

• Fitzwilliam Club Championships
• Fitzwilliam Plate^[21]
• Fitzwilliam Purse^[22]
• Irish Hard Court Championships
• Irish Lawn Tennis Championships
• Irish Open
• Shelbourne Irish Open

• Photo of the tennis courts at Wilton Place in 1952
• Photo of the tennis courts at the Mespil Estate in 1952