|Full name||Renata Marcinkowska|
|Country (sports)|| Poland|
|Born||24 February 1965|
|Highest ranking||No. 116 (November 12, 1990)|
|Grand Slam Singles results|
|Australian Open||1R (1989, 1991)|
|French Open||2R (1991)|
|US Open||1R (1990, 1991)|
|Grand Slam Doubles results|
|Australian Open||2R (1991)|
|French Open||1R (1991)|
|US Open||1R (1991)|
Renata Marcinkowska (born 24 February 1965) is a Polish-American former professional tennis player. She competed during her professional tennis career as Renata Baranski.
Born in Szczecin, Marcinkowska left Poland in 1981 to compete in the United States. Once there she received a scholarship to the Oklahoma State University, where she was an All-American collegiate tennis player. While at Oklahoma State she got married and became known as Renata Baranski. She graduated with a psychology degree in 1987, after which she joined the professional tour.
Her best performances on the WTA Tour include a semi-final finish at Guaruja in 1989, as well as quarter-final appearances at both the 1989 OTB Open in Schenectady and the 1991 Virginia Slims of Oklahoma. As a doubles player she made a WTA Tour final at the 1991 Nivea Cup in São Paulo, where she and Laura Glitz finished runners-up.
Marcinkowska featured in the main draw of all four grand slam tournaments.
Becoming a naturalized US citizen in 1991, Marcinkowska now lives in South Carolina and works as a teaching professional. She trains players on a dual surface court she invented, which is one half hard and the other clay.
|Loss||December, 1991||São Paulo, Brazil||Tier V||Clay||Laura Glitz|| Inés Gorrochategui
|Runner-up||1.||8 June 1986||Miramar, United States||Hard||Ronni Reis||4-6, 2-6|
|Runner-up||2.||22 June 1986||Fayetteville, United States||Hard||Lee Jeong-soon||4-6, 6-4, 2-6|
|Winner||1.||28 June 1987||Augusta, United States||Hard||Shaun Stafford||7-6(3), 3-6, 6-4|
|Winner||2.||17 July 1988||Greensboro, United States||Clay||Kim Kessaris||4-6, 6-1, 6-3|
|Winner||3.||31 July 1988||Evansville, United States||Clay||Pamela Jung||6-3, 6-2|
|Runner-up||3.||5 March 1989||Miami, United States||Hard||Andrea Farley||4-6, 1-6|
|Winner||1.||13 July 1986||Boynton Beach, United States||Hard||Robyn Lamb|| Jennifer Fuchs
|Runner-up||1.||18 January 1987||Miami, United States||Hard||Deeann Hansel|| Cheryl Jones
|Runner-up||2.||20 June 1988||Mobile, United States||Hard||Robyn Lamb|| Kim Il-soon
|Winner||2.||10 July 1989||Greensboro, United States||Clay||Courtney Allen|| Sofie Albinus
|2-6, 6-3, 6-3|
|Winner||3.||15 October 1989||Mobile, United States||Hard||Sandy Collins|| Kathy Foxworth
|Runner-up||3.||26 February 1990||Key Biscayne, United States||Hard||Linda Barnard|| Jennifer Fuchs