Esther Elo Joseph (born 4 April 2003) is a Nigerian sprinter.
She made her international debut at the 2023 African Games in Accra, where she won the silver medal in the 400 metres behind Mary Moraa and set a personal best in all three of her races, culminating in a 51.61 seconds personal best in the final. She returned to the championships and won a gold in the metres relay.
She competed for Nigeria at the 2024 World Athletics Relays in Nassau, Bahamas. With a time of 3:12.87, the Nigerian Mixed 4x400m team of Joseph, Samuel Ogazi, Ella Onojuvwevwo, and Chidi Okezie set a new Nigerian national record and African Continental record at the event on 5 May 2024.
She competed at the 2024 Summer Olympics over 400 metres in August 2024, but was ultimately disqualified.
Competiting for the University of Tennessee, Joseph ran 51.36 seconds to win 400 metres indoors at the Bob Pollock Invitational in Clemson in January 2026. The time moved her to fifth on the African all-time indoor list. She subsequently qualified for the 2026 NCAA Division I Indoor Track and Field Championships.