Memorial Stadium, nicknamed "The Sea of Red," is an American football stadium on the campus of the University of Nebraska–Lincoln in Lincoln, Nebraska. It primarily serves as the home venue of the Nebraska Cornhuskers football team and hosts the university's spring commencement ceremony.

The university began planning a new stadium complex shortly after World War I to replace Nebraska Field, an outdated venue that housed the program from 1909 to 1922. After a lengthy fundraising campaign and several design iterations, construction began in mid-1923. The unfinished Memorial Stadium opened on October 13, 1923, dedicated to honor Nebraskans who served in the American Civil War, the Spanish–American War, and World War I. The stadium was built with grandstands along its east and west sidelines; its capacity of 31,080 was unchanged until end zone bleachers were installed decades later. Major expansions of East, West, and North Stadium between 1999 and 2013 raised capacity to 85,458 and completely enclosed the original superstructure, which remains largely intact. Attendance regularly exceeded 90,000 in the past, though proposed future renovations will likely reduce capacity.

Nebraska has sold out 410 consecutive games at Memorial Stadium, an NCAA record for any sport that dates to 1962. In 2023, Memorial Stadium hosted Volleyball Day in Nebraska – the announced attendance of 92,003 was a stadium record and the highest ever recorded for a women's sporting event. The venue's listed capacity of 85,458 is thirteenth-highest among collegiate stadiums and twenty-fifth worldwide. Memorial Stadium is often listed among the best venues in college football.

In 1909, the University of Nebraska constructed Nebraska Field on the corner of North 10th and T Streets in downtown Lincoln, the school's first permanent football venue. Nebraska Field's wooden bleachers and limited seating capacity meant that after less than ten years there was significant momentum toward the building of a larger steel-and-concrete stadium. The abrupt departure of highly successful head coach Ewald O. Stiehm and American entry into World War I delayed the project, but when the war ended in 1918, with "the present athletic field as inadequate now as the old one was in 1907," the university began planning a new stadium on the Nebraska Field site.

College football exploded in popularity after the war and enthusiasm for a new stadium was high, with many suggesting it be named for former team captain Roscoe Rhodes, who was killed in France in 1918. The Nebraska Memorial Association was formed to fund and plan the "Nebraska Soldiers and Sailors Memorial," a million-dollar stadium complex that included a gymnasium, a museum, veterans' facilities, and extravagant Roman-style colonnades wrapping around the north and south end zones. The state set aside $250,000 for the project and another $150,000 was gathered from students and faculty, who were encouraged to "give until it hurts." Each county in the state was assigned a fundraising target based on its alumni population. The pledge drive received public backing and financial support from several notable alumni: John J. Pershing, commander of the American Expeditionary Forces who was the highest-ranking general in United States Armed Forces history; Cy Sherman, a sportswriter and future founder of college football's AP poll; and Kārlis Ulmanis, then-Prime Minister (and future dictator) of Latvia.

An agricultural depression through the early 1920s forced the state to back out of its commitment, and fundraising difficulties and local resistance meant most extraneous elements of the stadium project were scaled back or removed (a gymnasium, the Nebraska Coliseum, was constructed three years later). John Latenser Sr. of Omaha and Ellery L. Davis of Lincoln were selected as head architects as they offered to work pro bono, a significant boost to the cash-strapped Memorial Association. A ceremonial groundbreaking was held on April 23, 1923 when the fundraising target of $430,000 had been met, but higher-than-expected contractor bids pushed the price tag over $540,000 and required further design revisions. After taking out a $300,000 loan to cover pledges that remained unpaid, the Memorial Association accepted a $482,939 bid from Parsons Construction Company.

The contract between Parsons and the university required the stadium to be ready for the upcoming 1923 season, reflecting assurances made by the Memorial Association during fundraising. Parsons' employment of university students and prospective football players during construction was applauded by NU chancellor Samuel Avery. Work continued through a rainy summer and an August tornado, and was mostly complete in time for Nebraska's first home game, though lead builder Earl Hawkins insisted fans not be allowed into the unfinished upper sections. On October 13, Nebraska defeated Oklahoma 24–0 in the first game at the new stadium; it was played on dirt as the grass field had yet to be installed. The venue was formally dedicated a week later as "Memorial Stadium" to honor Nebraskans who served in the American Civil War, the Spanish–American War, and World War I.

In its original layout, the stadium was oriented north-to-south (Nebraska Field had been oriented east-to-west) with open end zones and grandstands along the east and west sidelines. A quarter-mile track surrounded the playing field. Each corner of the stadium was given an inscription from philosophy professor Hartley Burr Alexander: