Dermott Lennon (born 12 June 1969) is an equestrian from Ballinaskeagh, Northern Ireland, who competes in the sport of show jumping.

Lennon then topped-off the weekend by finishing 3rd in the Rolex FEI World Cup Qualifier on Woods Rosbotham's gelding, Hallmark Elite.

On 3 May, Lennon won the second leg of the Showjumping Ireland Premier Series Grand Prix in Coilog EC with the eight-year-old Vampire.

In the 5th leg of the Meydan FEI Nations Cup, which was won by the home team, Ireland finished 5th on 24 faults: Dermott Lennon (Hallmark Elite) 4/12, Jessica Kuerten (Castle Forbes Myrtille Paulois) (8)/(12), Shane Breen (Carmena Z) 4/4, Denis Lynch (Nabab's Son) 0/0.

In the 6th leg of the Meydan FEI Nations Cup on Thursday, the Irish team finished on a 4 fault score to win: Billy Twomey (Tinka's Serenade) 4/0; Dermott Lennon (Hallmark Elite) 0/0; Cian O'Connor (K Club Lady) 0/0; Denis Lynch (Lantinus) (4)/(NS).

Lennon was once again selected as part of the Irish Team – this time at the Royal International Horse Show at Hickstead, Great Britain.

In the Nations Cup on Friday, Ireland finished joint 2nd on 20 faults with the USA: Billy Twomey (Tinka's Serenade) 0/4; Dermott Lennon (Hallmark Elite) (12)/(8); Cian O'Connor (K Club Lady) 8/0; Denis Lynch (Nabab's Son) 8/0.

A foot in the water in the first round of the Longines Grand Prix cost Lennon and Hallmark Elite a place in the jump-off, but they were the quickest '4-faulter' to finish 11th of the 40 starters.

Lennon travelled to the Royal Winter Festival in Toronto Canada where he and Hallmark Elite finished 3rd in the FEI World Cup Qualifier and earned €9,000.

CSI3* Maubeuge, France: Lennon and Vampire won the 1m50 Grand Prix Qualifier on Saturday night to take €7,920 in prize-money.

CSIO5* World Equestrian Festival, Aachen, Germany: On Saturday night, Hallmark Elite won the Accumulator for €7,300, and Loughview Lou-Lou finished 4th in the 'Sparkasse Derby' to earn €2,600.

CSI4*-W 'The Royal Horse Show' Toronto, Canada: In the $100,000 FEI World Cup on Friday, Lennon and Hallmark Elite took 3rd prize of $14,000 (€10,000).