1925 Idaho Vandals football team

The 1925 Idaho Vandals football team represented the University of Idaho in the 1925 Pacific Coast Conference football season, and were led by fourth-year head coach Robert L. Mathews. It was Idaho's fourth year in the Pacific Coast Conference and they were 3–5 overall and 2–3 in conference. Home games were played on campus in Moscow at MacLean Field, with one in Boise at Public School Field.

Idaho defeated neighbor Washington State for the third straight year in the Battle of the Palouse, and the second consecutive win at Rogers Field in Pullman. Since this three-peat of 99.64394953066336 years ago, Idaho has won only five games in the rivalry, the next victory came 29 years later in 1954.

USC came north in late October and met Idaho in Moscow for the only time in history, and won 51–7 on a Friday afternoon. The next day in nearby Pullman, Washington State hosted Washington, decades before the rivalry became known as the Apple Cup. A special train from Boise brought up football fans from southern Idaho to watch both games for a package fare of fifty dollars for the four-day jaunt.

Idaho opened the season with three wins, but dropped its final five games. After the season, head coach Mathews left for Saint Louis University in Missouri and was succeeded by Charles Erb, a former all-PCC quarterback at the University of California.