| Surface: | Turf |
| Class: | Discontinued Grade 3 stakes |
| Horse Race: | Sea o'Erin Stakes |
| Location: | Arlington Park Arlington Heights, Illinois, United States |
| Inaugurated: | 1980 |
| Race Type: | Thoroughbred – Flat racing |
| Website: | www.arlingtonpark.com |
| Distance: | 1 mile (8 furlongs) |
| Track: | Left-handed |
| Qualification: | Three-year-olds & up |
| Weight: | Assigned |
| Purse: | US$100,000 |
The Sea o'Erin Stakes was American Thoroughbred horse race held annually in early September at Arlington Park racetrack in Arlington Heights, Illinois. A Grade III event open to horses age three and older, it was contested on turf over a distance of one mile (8 furlongs).
Inaugurated in 1980 as the Sea o'Erin Handicap, the race was run at various distances:
Due to heavy rains, the 1996 race was switched from the turf course to the main dirt track.
There was no race run in 1986, 1988, 1995, and 1997–2000.
Speed record:
Most wins:
Most wins by an owner:
Most wins by a jockey:
Most wins by a trainer:
| Year | Winner | Age | Jockey | Trainer | Owner | Time |
|---|---|---|---|---|---|---|
| 2012 | Nikki's Sandcastle | 5 | Diego Sanchez | David Kassen | Richard Sherman | 1:43.38 |
| 2010 | - 2011 | align=center colspan=6 | Race not held | |||
| 2009 | Public Speaker | 4 | Junior Alvarado | Dale Bennett | Peter J. Kalahalios | 1:35.04 |
| 2008 | Karelian | 6 | James Graham | George R. Arnold II | Richard Masson | 1:36.37 |
| 2007 | Spotsgone | 4 | Earlie Fires | William Fires | Robert Yagos | 1:38.10 |
| 2006 | Therecomesatiger | 4 | Mark Guidry | Thomas F. Proctor | Charles R. Patton | 1:37.15 |
| 2005 | Fort Prado | 4 | Eddie Razo Jr. | Chris M. Block | Team Block | 1:36.18 |
| 2004 | Herculated | 4 | Carlos H. Marquez Jr. | Mike Stidham | Oak Crest Farm | 1:36.48 |
| 2003 | Rock Slide | 5 | Robby Albarado | Neil J. Howard | W. Farish/ J. Elkins/ W.T. Webber Jr. | 1:35.85 |
| 2002 | Mystery Giver | 4 | René Douglas | Chris M. Block | Team Block | 1:38.17 |
| 2001 | Intern | 5 | Eddie Martin Jr. | Louie Roussel III | Louie Roussel III | 1:35.73 |
| 1997 | - 2001 | align=center colspan=6 | Race not held | |||
| 1996 | Jambalaya Jazz | 4 | John C. Oxley | 1:36.57 | ||
| 1995 | align=center colspan=6 | Race not held | ||||
| 1994 | First And Only | 7 | Mason C. Rudd | 1:34.93 | ||
| 1993 | Journalism | 5 | Richard Stephen | 1:36.35 | ||
| 1992 | Lotus Pool | 5 | Yoshiki Akazawa | 1:35.12 | ||
| 1991 | Roscius | 4 | Nancy Vanier & Dr. Louis Aitken | 1:37.64 | ||
| 1990 | Charlie Barley | 4 | Robin Platts | Grant Pearce | King Caledon Farms | 1:36.60 |
| 1989 | Set a Record | 5 | Hermitage Farm | 1:37.20 | ||
| 1988 | align=center colspan=6 | Race not held | ||||
| 1987 | New Colony | 4 | Heriberto Valdivieso | Charlie Stutts | Sonny Lou Stable | 1:48.80 |
| 1986 | align=center colspan=6 | Race not held | ||||
| 1985 | Sari's Baba | 5 | N. Calvin Moore | N. Calvin Moore | 1:43.00 | |
| 1984 | Jack Slade | 4 | Andrew Adams | 1:42.40 | ||
| 1983 | Dom Cimarosa | 4 | Charles E. Schmidt Jr. | 1:44.20 | ||
| 1982 | Parcel | 4 | Michael R. Morgan | Tartan Stable | 1:43.40 | |
| 1981 | Summer Advocate | 4 | Pat Day | Mike Ball | Don Ball | 1:47.60 |
| 1980 | Rossi Gold | 4 | Leslie Combs II & Frank McMahon | 1:52.20 | ||