2011 Sylvania 300

{{Use mdy dates|date=February 2025}}

{{NASCAR race season infobox

| Type = NAS

| Race Name = Sylvania 300

| Details ref = {{cite web|url=https://www.espn.com/racing/schedule/_/year/2011 |title=Sprint Cup Series Schedule |location=ESPN |access-date=October 27, 2011 |url-status=live |archive-url=https://web.archive.org/web/20120120034554/http://espn.go.com/racing/schedule/_/year/2011 |archive-date=January 20, 2012 }}

| Fulldate = {{Start date|2011|9|25}}

| Year = 2011

| Race_No = 28

| Season_No = 36

| Image = New Hampshire Motor Speedway.PNG

| Caption = Layout of New Hampshire Motor Speedway

| Location = New Hampshire Motor Speedway, Loudon, New Hampshire

| Course_mi = 1.06

| Course_km = 1.703

| Distance_laps = 300

| Distance_mi = 317.4

| Distance_km = 510.8

| Weather = Warm with temperatures approaching {{convert|82|F|C}}; wind speeds up to {{convert|6|mph|km/h}}[http://www.almanac.com/weather/history/NH/Loudon/2011-09-25 Weather information for the 2011 Sylvania 300] at The Old Farmers' Almanac

| Avg = {{convert|116.679|mi/h}}

| Pole_Driver = Ryan Newman

| Pole_Team = Stewart Haas Racing

| Pole_Time = 28.213

| Most_Driver = Jeff Gordon

| Most_Team = Hendrick Motorsports

| Most_laps = 79

| Car = 14

| First_Driver = Tony Stewart

| First_Team = Stewart Haas Racing

| Network = ESPN

| Announcers = Allen Bestwick, Dale Jarrett and Andy Petree

}}

The 2011 Sylvania 300 was a NASCAR Cup Series stock car race that was held on September 25, 2011 at New Hampshire Motor Speedway in Loudon, New Hampshire. Contested 300 laps on the 1.058-mile (1.702 km) asphalt oval, it was the 28th race of the 2011 Sprint Cup Series season, as well as the second race in the ten-race Chase for the Sprint Cup, which ends the season. The race was won by Tony Stewart for the Stewart Haas Racing team. Brad Keselowski finished second, and Greg Biffle clinched third.