Katalin Marosi (born 12 November 1979) is a Hungarian former professional tennis player.

In her career, Marosi won 15 singles and 31 doubles titles on the ITF Women's Circuit. On 8 May 2000, she reached her best singles ranking of world No. 101. On 6 May 2013, she peaked at No. 33 in the doubles rankings.

Playing for Hungary Fed Cup team, Marosi has a win–loss record of 15–13.

Her mother Ildiko is a secretary and her father Sandor a gymnastics trainer; she has an older brother (Peter). Marosi was introduced to tennis at age six by Antal and Eva Elekes in Budapest. Favorite surface of the all-court player was hardcourt, favorite shot forehand. Best memories include warming-up her serve with Steffi Graf in 1996 Roland Garros juniors, and winning her first ITF event. Marosi admired Graf because she knew everything about tennis and was so good mentally.

Result	No.	Date	Tournament	Surface	Partner	Opponents	Score
Loss	1.	May 2009	Portugal Open	Clay	Sharon Fichman	Raquel Atawo Abigail Spears	6–2, 3–6, [5–10]
Loss	2.	Jul 2012	Palermo Ladies Open, Italy	Clay	Darija Jurak	Renata Voráčová Barbora Strýcová	6–7(5–7), 4–6
Loss	3.	May 2013	Portugal Open	Clay	Darija Jurak	Chan Hao-ching Kristina Mladenovic	6–7(3–7), 2–6

Result	No.	Date	Tournament	Surface	Opponent	Score
Loss	1.	18 September 1995	ITF Cluj, Romania	Clay	Raluca Sandu	3–6, 3–6
Win	1.	4 December 1995	ITF São Paulo, Brazil	Hard	Meghann Shaughnessy	6–0, 6–2
Win	2.	8 July 1996	ITF Vigo, Spain	Clay	Gisela Riera	6–1, 6–2
Win	3.	25 November 1996	ITF São Paulo	Hard	Keirsten Alley	6–7(2), 6–3, 6–4
Win	4.	2 December 1996	ITF São Paulo	Hard	Keirsten Alley	6–3, 6–1
Win	5.	7 April 1997	ITF Viña del Mar, Chile	Clay	Celeste Contín	6–1, 6–4
Win	6.	26 May 1997	ITF Barcelona, Spain	Clay	Marta Cano	6–2, 6–3
Loss	2.	28 September 1998	ITF Córdoba, Argentina	Clay	Erica Krauth	6–2, 1–6, 4–6
Win	7.	30 November 1998	ITF Guadalajara, Mexico	Clay	Vanessa Menga	7–5, 6–3
—		10 October 1999	Batumi Ladies Open, Georgia	Carpet	Julia Abe	not finished
Win	8.	13 December 1999	ITF New Delhi, India	Hard	Tathiana Garbin	6–2, 1–1 ret.
Loss	3.	6 March 2000	ITF Haikou, China	Hard	Yi Jingqian	6–4, 0–6, 1–6
Win	9.	27 November 2000	ITF Tucson, United States	Hard	Alina Jidkova	6–7(3), 6–4, 6–3
Win	10.	21 May 2002	ITF Torino, Italy	Clay	Maja Palaveršić	4–6, 6–1, 6–0
Loss	4.	12 July 2004	ITF Campos do Jordão, Brazil	Hard	Maria Fernanda Alves	5–7, 6–7(2)
Win	11.	16 August 2004	ITF Kędzierzyn-Koźle, Poland	Clay	Veronika Raimrová	6–4, 4–6, 6–2
Win	12.	30 August 2005	ITF Gliwice, Poland	Clay	Natalia Kołat	6–1, 6–3
Win	13.	21 May 2006	ITF Budapest, Hungary	Clay	Nataša Zorić	6–4, 7–5
Win	14.	26 June 2006	ITF Salzburg, Austria	Clay	Sandra Klemenschits	w/o
Win	15.	28 April 2008	ITF Bell Ville, Argentina	Clay	Aranza Salut	6–2, 6–2
Loss	5.	11 August 2008	Palić Open, Serbia	Clay	Lenka Wienerová	5–7, 6–7(6)
Loss	6.	29 June 2009	ITF Stuttgart, Germany	Clay	Zarina Diyas	1–6, 2–6
Loss	7.	31 August 2009	ITF Maribor, Slovenia	Clay	Simona Halep	4–6, 2–6

Result	No.	Date	Tournament	Surface	Partner	Opponents	Score
Win	1.	30 October 1995	ITF Santiago, Chile	Clay	Miriam D'Agostini	Bárbara Castro María-Alejandra Quezada	6–0, 6–3
Win	2.	6 November 1995	ITF São Paulo, Brazil	Clay	Miriam D'Agostini	Laura Montalvo Cintia Tortorella	6–1, 1–6, 7–5
Win	3.	13 November 1995	ITF Buenos Aires, Argentina	Clay	Miriam D'Agostini	Florencia Cianfagna Paola Suárez	6–7(4), 6–0, 6–3
Loss	1.	4 December 1995	ITF São Paulo	Hard	Nannie de Villiers	Vanessa Menga Luciana Tella	3–6, 2–6
Win	4.	9 December 1996	ITF São Paulo	Clay	Florencia Cianfagna	Keirsten Alley Paige Yaroshuk	6–4, 6–7(4), 6–3
Win	5.	7 April 1997	ITF Viña del Mar, Chile	Clay	Veronica Stele	Celeste Contín Luciana Masante	6–1, 5–7, 6–2
Loss	2.	26 May 1997	ITF Barcelona, Spain	Clay	Veronica Stele	Kim de Weille Amanda Hopmans	4–6, 7–5, 4–6
Win	6.	9 June 1997	ITF Budapest, Hungary	Clay	Veronica Stele	Elena Tatarkova Fabiola Zuluaga	6–3, 6–3
Win	7.	16 June 1997	Open de Marseille, France	Clay	Veronica Stele	Caroline Dhenin Nino Louarsabishvili	6–2, 4–6, 6–1
Win	8.	30 June 1997	ITF Mont-de-Marsan, France	Clay	Veronica Stele	Saori Obata Nami Urabe	6–4, 6–3
Loss	3.	29 September 1997	ITF Otočec, Slovenia	Clay	Petra Mandula	Lenka Cenková Kateřina Kroupová	5–7, 6–7(3)
Loss	4.	10 November 1997	ITF Le Havre, France	Clay (i)	Caroline Schneider	Melanie Schnell Julie Steven	2–6, 6–3, 6–7(3)
Loss	5.	17 November 1997	ITF Deauville, France	Clay (i)	Caroline Schneider	Julia Abe Lubomira Bacheva	6–2, 6–4
Loss	6.	24 November 1997	ITF Mallorca, Spain	Clay	Melanie Schnell	Rosa María Andrés Rodríguez Marina Escobar	4–6, 2–6
Win	9.	1 December 1997	ITF Mallorca, Spain	Clay	Melanie Schnell	Marta Cano Conchita Martínez Granados	6–4, 4–6, 7–5
Loss	7.	5 October 1998	ITF Santiago, Chile	Clay	Miriam D'Agostini	Laura Montalvo Paola Suárez	1–6, 2–6
Loss	8.	30 November 1998	ITF Guadalajara, Mexico	Clay	Miriam D'Agostini	Lindsay Lee-Waters Meghann Shaughnessy	1–6, 3–6
Win	10.	22 February 1999	ITF Bushey, United Kingdom	Carpet (i)	Emmanuelle Gagliardi	Svetlana Krivencheva Tina Križan	6–7(4), 6–2, 7–6(0)
Win	11.	26 April 1999	ITF Espinho, Portugal	Clay	Alicia Ortuño	Francesca Lubiani Maria Paola Zavagli	6–3, 6–4
Loss	9.	30 August 1999	ITF Fano, Italy	Clay	Alicia Ortuño	Debby Haak Andrea van den Hurk	1–6, 4–6
Loss	10.	20 September 1999	ITF Sofia, Bulgaria	Clay	Nadejda Ostrovskaya	Rosa María Andrés Rodríguez Conchita Martínez Granados	w/o
Loss	11.	28 February 2000	ITF Chengdu, China	Hard	Joana Cortez	Li Na Li Ting	1–6, 3–6
Win	12.	3 April 2000	Al Habtoor Challenge, United Arab Emirates	Hard	Tathiana Garbin	Angelika Bachmann Tina Križan	7–6(5), 6–3
Win	13.	9 October 2000	ITF Poitiers, France	Hard (i)	Yvette Basting	Petra Mandula Patricia Wartusch	7–6(4), 6–1
Win	14.	27 November 2000	ITF Tucson, United States	Hard	Liezel Huber	Dawn Buth Jolene Watanabe	6–4, 6–2
Loss	12.	2 April 2001	Al Habtoor Challenge, United Arab Emirates	Hard	Caroline Dhenin	Laurence Courtois Seda Noorlander	3–6, 0–6
Loss	13.	23 July 2001	ITF Ettenheim, Germany	Clay	Irina Selyutina	Eva Dyrberg Maja Matevžič	w/o
Win	15.	3 September 2001	ITF Fano, Italy	Clay	Giulia Casoni	Eva Bes-Ostariz Gisela Riera	6–3, 6–4
Win	16.	24 September 2001	Batumi Ladies Open, Georgia	Carpet	Tatiana Poutchek	Nadejda Ostrovskaya Anastasia Rodionova	6–3, 7–6(3)
Loss	14.	21 May 2002	ITF Torino, Italy	Clay	Erica Krauth	Katarina Mišić Dragana Zarić	6–7(5), 3–6
Loss	15.	27 May 2002	ITF Mostar, Bosnia and Herzegovina	Clay	Katarina Mišić	Tina Hergold Sandra Načuk	6–3, 6–3
Win	17.	22 July 2002	ITF Český Krumlov, Czech Republic	Clay	Tina Hergold	Gabriela Chmelinová Milena Nekvapilová	6–7(2), 5–7
Win	18.	3 December 2002	ITF Boynton Beach, U.S.	Clay	Samantha Reeves	Alina Jidkova Lina Krasnoroutskaya	2–6, 6–7(5)
Win	19.	22 June 2004	ITF Fontanafredda, Italy	Clay	Erica Krauth	Martina Müller Vladimíra Uhlířová	2–6, 6–3, 6–2
—	NP	18 July 2004	ITF Campos do Jordão, Brazil	Hard	Frederica Piedade	Maria Fernanda Alves Carla Tiene	NP
Win	20.	16 August 2004	ITF Kędzierzyn-Koźle, Poland	Clay	Marina Tavares	Iveta Gerlová Sandra Záhlavová	1–6, 6–4, 6–2
Loss	16.	31 August 2004	ITF Mestre, Italy	Clay	Marina Tavares	Rosa María Andrés Rodríguez Lourdes Domínguez Lino	1–6, 2–6
Loss	17.	10 May 2005	ITF Casale Monferrato, Italy	Clay	Gloria Pizzichini	Joana Cortez Roxane Vaisemberg	2–6, 0–6
Loss	18.	23 August 2005	ITF Maribor, Slovenia	Clay	Marina Tavares	Mari Andersson Kristina Andlovic	6–7(2), 3–6
Loss	19.	27 September 2005	ITF Volos, Greece	Carpet	Marina Tavares	Nicole Clerico Katariina Tuohimaa	4–6, 2–6
Win	21.	4 October 2005	ITF Rome, Italy	Clay	Marina Tavares	Giulia Meruzzi Nancy Rustignoli	w/o
Win	22.	26 June 2006	ITF Salzburg, Austria	Clay	Marina Tavares	Daniela Klemenschits Sandra Klemenschits	3–6, 7–6(2), 6–3
Win	23.	16 June 2008	ITF Davos, Switzerland	Clay	Marina Tavares	Kateřina Kramperová Janina Toljan	5–7, 6–4, [10–7]
Loss	20.	30 June 2008	ITF Stuttgart, Germany	Clay	Marina Tavares	Kristina Barrois Laura Siegemund	3–6, 4–6
Win	24.	20 October 2008	Challenger de Saguenay, Canada	Hard (i)	Marina Tavares	Gabriela Dabrowski Sharon Fichman	2–6, 6–4, [10–4]
Win	25.	16 March 2009	ITF Cairo, Egypt	Clay	Anikó Kapros	Megan Moulton-Levy Laura Siegemund	7–5, 6–3
Win	26.	23 March 2009	ITF Latina, Italy	Clay	Marina Tavares	Ekaterina Lopes Marina Shamayko	6–2, 6–0
Win	27.	29 June 2009	ITF Stuttgart, Germany	Clay	Laura Siegemund	Leonie Mekel Kathrin Wörle	7–6(2), 6–7(6), [10–4]
Loss	21.	30 November 2009	Zubr Cup, Czech Republic	Hard (i)	Darija Jurak	Sandra Klemenschits Andreja Klepač	7–6(3), 3–6, [10–7]
Loss	22.	6 June 2011	ITF Zlín, Czech Republic	Clay	Réka Luca Jani	Yuliya Beygelzimer Margalita Chakhnashvili	6–3, 1–6, [8–10]
Win	28.	12 September 2011	Zagreb Ladies Open, Croatia	Clay	Maria João Koehler	Maria Abramović Mihaela Buzărnescu	6–0, 6–3
Win	29.	19 September 2011	GB Pro-Series Shrewsbury, UK	Hard (i)	Maria João Koehler	Amanda Elliott Johanna Konta	7–6(3), 6–1
Loss	23.	19 December 2011	Ankara Cup, Turkey	Hard (i)	Janette Husárová	Nina Bratchikova Darija Jurak	4–6, 2–6
Win	30.	5 March 2012	ITF Irapuato, Mexico	Hard	Janette Husárová	Maria Elena Camerin Mariya Koryttseva	6–2, 6–7(9), [10–7]
Win	31.	12 March 2012	The Bahamas Open	Hard	Janette Husárová	Eva Birnerová Anne Keothavong	6–1, 3–6, [10–6]
Loss	24.	7 May 2012	Open de Cagnes-sur-Mer, France	Clay	Renata Voráčová	Alexandra Panova Urszula Radwańska	5–7, 6–4, [6–10]

• Katalin Marosi at the Women's Tennis Association
• Katalin Marosi at the International Tennis Federation
• Katalin Marosi at the Billie Jean King Cup (archived)