|Full name||Elizabeth Coulson (nee Jelfs)|
|Country (sports)||Great Britain|
|Born||28 July 1976|
Banbury, Oxfordshire, England
|Highest ranking||No. 207 (11 September 1995)|
|Grand Slam Singles results|
|Career titles||0 WTA, 12 ITF|
|Highest ranking||No. 200 (3 November 1997)|
|Grand Slam Mixed Doubles results|
Elizabeth Coulson (née Jelfs; born 28 July 1976) is a British former-professional tennis player.
Jelfs, who is originally from Banbury, won the girls' doubles title at the 1994 Wimbledon Championships. She and South African partner Nannie de Villiers defeated Corina Morariu and Ludmila Varmužová in the final. The same pair were also runner-up in the girls' doubles at the 1995 US Open.
In 1995 she appeared in the main draw of three WTA Tour tournaments in the lead up to Wimbledon. She qualified as a lucky loser for the singles at the British Clay Court Championships, then received a wildcard into the doubles at Birmingham with Karen Cross, before winning her way through qualifying to play singles in Eastbourne. On the back of these performances she was granted a wildcard spot into the 1995 Wimbledon Championships and was beaten in the first round by Christina Singer. Later in the year she surpassed Clare Wood as Britain's top-ranked female player.
Singles: 4 (0–4)
|Runner-up||1.||1 February 1993||Newcastle, United Kingdom||Carpet||Gaby Coorengel||1–6, 2–6|
|Runner-up||2.||24 July 1995||Salvador, Brazil||Hard||Lucila Becerra||4–6, 3–6|
|Runner-up||3.||27 April 1998||Hatfield, United Kingdom||Clay||Mariam Ramón Climent||1-6, 6-1, 3-6|
|Runner-up||4.||31 August 1998||Xanthi, Greece||Hard||Eleni Daniilidou||2–6, 0–6|
Doubles: 15 (12–3)
|Runner-up||1.||24 April 1995||Edinburgh, United Kingdom||Clay||Karen Cross|| Robyn Mawdsley
|Winner||2.||8 May 1995||Edinburgh, United Kingdom||Clay||Karen Cross|| Kaye Hand
|3–6, 6–3, 6–0|
|Winner||3.||13 April 1997||Jakarta, Indonesia||Hard||Jasmine Choudhury|| Kyung-Joo Won
|Winner||4.||8 July 1997||Felixstowe, United Kingdom||Grass||Surina De Beer|| Helen Crook
|Winner||5.||21 July 1997||Dublin, Ireland||Grass||Surina De Beer|| Amanda Augustus
|6–3, 4–6, 6–4|
|Runner-up||6.||29 September 1997||Nottingham, United Kingdom||Hard (i)||Karen Cross|| Lucie Ahl
|Winner||7.||25 April 1998||Bournemouth, United Kingdom||Clay||Mareze Joubert|| Limor Gabai
|Runner-up||8.||27 April 1998||Hatfield, United Kingdom||Clay||Amanda Keen|| Celeste Contín
Mariam Ramón Climent
|6–3, 3–6, 4–6|
|Winner||9.||18 July 1998||Frinton, United Kingdom||Grass||Mareze Joubert|| Lucie Ahl
|Winner||10.||27 July 1998||Ilkley, United Kingdom||Grass||Mareze Joubert|| Helen Crook
|Winner||11.||3 August 1998||Southsea, United Kingdom||Grass||Mareze Joubert|| Eleni Daniilidou
|Winner||12.||21 September 1998||Sunderland, United Kingdom||Hard||Mareze Joubert|| Helen Crook
|Winner||13.||1 February 1999||Sheffield, United Kingdom||Hard (i)||Lorna Woodroffe|| Surina De Beer
Kim de Weille
|3–6, 6–4, 6–3|
|Winner||14.||5 April 1999||Cerignola, Italy||Clay||Jasmine Choudhury|| Irina Kornienko
|Winner||15.||3 October 1999||Glasgow, United Kingdom||Carpet (i)||Karen Nugent|| Gréta Arn
- "Sporting Digest: Tennis". The Independent. 4 July 1994. Retrieved 22 September 2017.
- "Lizzie Jelfs Britain's Highest Ranked Tennis Player". The Independent. 15 August 1995. Retrieved 22 September 2017.
- "Mixed Doubles - Full Results". BBC Online. Retrieved 22 September 2017.
- "Why I took my clothes off for tennis". Oxford Mail. 2 June 2000. Retrieved 22 September 2017.