Omiya Ardija Football Club (abbreviated as "RB Omiya Ardija", in English: RB Omiya Ardija) was established in 1964 and is located in Saitama City, Saitama Prefecture, Japan. It is a professional football club in Japan.
The club participated in the J1 League in 2005, having been promoted from the J2 League as the runner-up in 2004, and continued to compete until 2014. In 2023, Omiya Ardija Football Club was relegated to the J3 League after finishing last in the second division, marking the first time the club has participated in the third tier since 1993.
On October 13, 2024, Omiya Ardija defeated Fukushima United 3-2, successfully earning promotion to the J2 League and returning to the J2 League after a year. Six days later, Omiya Ardija drew 1-1 with Imabari FC in the 33rd round, securing the J3 League championship.