Nassau County Stakes

{{Infobox horseraces

| class = Grade III

| horse race = Nassau County Stakes

| image =

| caption =

| location = Belmont Park
Elmont, New York, United States

| inaugurated = 1996

| race type = Thoroughbred - Flat racing

| website = {{URL|http://www.nyra.com/index_belmont.html}}

| distance = 7 furlongs

| surface = Dirt

| track = left-handed

| qualification = Three-year-old fillies

| weight = Assigned

| purse = $200,000+

| bonuses =

}}

The Nassau County Stakes is an American Thoroughbred horse race run annually at Belmont Park in Elmont, Nassau County, New York. A Grade III event, it is open to three-year-old fillies willing to run the distance of seven furlongs on dirt. The race offers a purse $200,000 added.[http://www.nyra.com/Belmont/Stakes/NassauCounty.shtmlNassau County Stakes history at the NYRA]{{Dead link|date=April 2020 |bot=InternetArchiveBot |fix-attempted=yes }}

Inaugurated in 1996, it is named after the county on Long Island in which Belmont Park is located.

On November 28, 2007, this Grade II stakes race was downgraded to a Grade III by the American Graded Stakes Committee.

Previously, Belmont Park hosted the Nassau County Handicap, a race on dirt for horses of either sex, age three and older. This race was last run in 1993.