|League||USA Swimming, Ohio LSC|
|Based in||Finneytown, Ohio|
|Arena||Keating Natatorium, St. Xavier High School|
|Colors||Blue & Red|
|Head coach||Chris Wolford
Mike Wenert (Associate Head Coach)
Jeremy Wilken (Head Age Group Coach)
Tommy Seay (Princeton)
Sue House (NKU)
Mimi Strenk (Taylor)
Dr. Dan Carl (Sycamore)
Ryan Hammer (Team Manager)
The Cincinnati Marlins are a non-profit, USA Swimming–affiliated swim team based in Cincinnati, Ohio, United States serving Cincinnati and Northern Kentucky. Founded in 1961, the team competes at the elementary school, high school, and college levels.
The Marlins operate four training facilities: Northern Kentucky University using the NKU Campus Recreation Center; Taylor High School in North Bend, Ohio; Princeton High School in Sharonville, Ohio; and its headquarters at Keating Natatorium on the campus of St. Xavier High School in Finneytown, Ohio. The organization was designated a Gold Medal Club by USA Swimming 2006 - 2008  and designated a Level 4 club, which is the highest level attainable in the USA Swimming's Club Recognition Program in 2008.
Keating Natatorium at St. Xavier High School is a 50-meter indoor facility which can be divided into two 25-yard pools. Keating has seating capacity for over 1000 spectators and is the site of many USA Swimming and High School meets and championships. Marlins Central swimmers train at this facility.
Marlins North swimmers train at Princeton High School natatorium. The facility includes a six lane, 25 yard pool with seating for 300 spectators. The Marlins manage this facility for their program and for the Princeton High School swimming and water polo teams.
Marlins West swimmers train at the Taylor High School natatorium. The facility includes a five lane, 25-yard pool which is shared with the Taylor High School Yellowjackets.
The Cincinnati Marlins swim team was founded in 1961. Eighty-nine girls were selected for the team the first year, with seventy-seven boys joining the following year. For many years the team was known as the Cincinnati "Pepsi" Marlins. Their current home facility, Keating Natatorium, was built in 1969. It is named after Charles Keating, Sr.. The Marlins and Keating Natatorium host approximately 20 swimming competitions a year.
The Marlins have placed a swimmer on every Olympic Team from 1968 - 2004. Team members have broken numerous National Record and World Records. In 1980 the team captured the United States National Championship. That year, six Marlins’ swimmers were named to the U.S. Olympic team, more than from any other team. The Olympic tradition carries on to today where two Marlins represented the United States in the 2000 Sydney Olympics and the 2004 Athens Olympics. Six former Marlins coaches have been named to Olympic Coaching Staffs. The team was named Junior National Team Champions in 1983, 84, 97,98,99, and 2000. In 2005, the Men’s team placed first, the combined team second. Swimming World Magazine named the Cincinnati Marlins 1999’s Best Age-Group Team in America.
Significant achievements include: · 1980 National Team Champions · 23 Olympic Medals · 15 World Records · 19 American Records · 60 National Champions · 6 American Swimmers of the Year 
- Lisa Buese – silver medalist at the 1979 Pan American Games
- Deena Deardurff – gold medalist at the 1972 Summer Olympics and silver medalist at the 1973 World Aquatics Championships
- Nate Dusing – silver medalist at the 2000 Sydney Summer Olympics and bronze medalist at the 2004 Athens Summer Olympics
- Stephanie Elkins – gold medalist at the 1978 World Aquatics Championships and 1979 Pan American Games
- Jerry Frentsos – gold medalist at the 1987 Pan American Games
- Gary Hall, Sr. – silver medalist at the 1968 Mexico City and 1972 Munich Summer Olympics and bronze medalist at the 1976 Montreal Summer Olympics
- Paul Hove – bronze medalist at the 1975 World Aquatics Championships
- Joe Hudepohl – gold medalist at the 1992 Barcelona and 1996 Atlanta Summer Olympics
- Charles Keating, Jr. – 1946 NCAA swimming champion
- Dan Ketchum – gold medalist at the 2004 Athens Summer Olympics
- Mary T. Meagher – gold medalist at the 1984 Los Angeles Summer Olympics and bronze medalist at the 1988 Seoul Summer Olympics
- Betsy Mitchell – silver medalist at the 1984 Los Angeles and 1988 Seoul Summer Olympics
- Erin Phenix – gold medalist at the 2000 Sydney Summer Olympics and silver medalist at the 2001 World Aquatics Championships
- Kim Rhodenbaugh – silver medalist at the 1982 World Aquatics Championships and bronze medalist at the 1983 Pan American Games
- Dave Wilson – gold medalist at the 1984 Los Angeles Summer Olympics
- Paul Bergen – inductee to the International Swimming Hall of Fame
- Skip Kenney (1977–79) – head swimming coach, Stanford Cardinal, and inductee to the International Swimming Hall of Fame
- Cincinnati Marlins (2007). "Marlins Advantage Descriptions". Retrieved 2009-05-04.
- "Club Excellence Program". USA Swimming. Retrieved 2008-07-11.
- "Club Recognition Program". USA Swimming. Retrieved 2009-03-06.
- USA Swimming (2009). "USA Swimming Historical Documents". Retrieved 2009-03-06.
- Cincinnati Marlins (2008-06-21). "Nine Cincinnati Marlins to Swim at Olympic Trials". Cincinnati.com. Gannett Company. Retrieved 2008-07-11.
- Cincinnati Marlins (2007). "History". Retrieved 2009-05-04.
- Cincinnati Marlins (2007). "Cincinnati Marlins Hall of Fame". Retrieved 2008-07-11.
- Zipperstein, Leah (2009-12-23). "Olympic medalist dives into coaching" (fee required). The Cincinnati Enquirer (Gannett Company). Retrieved 2009-12-26. "[Dan] Ketchum, a Sycamore High graduate who swam for Michigan and competed in the 2004 Olympics, is in his first season as coach at Loveland High. ... But as a swimmer for the Cincinnati Marlins, Ketchum trained with the best..."
- "Paul Bergen (USA/CAN): 1998 Honor Coach". International Swimming Hall of Fame. 2006-11-06. Retrieved 2010-07-30.
- Kane, Colleen (2004-05-06). "2 locals to enter Swimming Hall of Fame". The Cincinnati Enquirer (Gannett Company). Retrieved 2008-07-11.