Israel Isaac Ayuma (born August 8, 2005) is a Nigerian professional footballer who plays as a midfielder for Croatian HNL club Istra 1961.
On 10 August 2023, Ayuma signed a contract with HNL club Istra 1961 until 2026. He made his debut on 25 January 2025 against Dinamo Zagreb. On 17 June 2025, he extended his contract with Istra 1961 until 2028.
Ayuma was first called up to the Nigeria U20 for the 2025 U-20 Africa Cup of Nations on 17 April 2025. He made his international debut for Nigeria U20 on 4 May 2025 in a 2025 U-20 Africa Cup of Nations match against Morocco U20.