Adele Simmons was a Human Starfleet officer of the early-to-mid 24th century.
In 2328, Simmons boarded a transport ship at Starbase Allen, bound for Lauritson's Planet. This information was part of a passenger manifest recorded in the commercial transport database and reviewed by Lieutenant Commander Data in 2370. (TNG: "Inheritance")
In 2245, Vice Admiral Simmons was listed as the representative for Tactical Command on the dedication plaque of the USS Brattain. (TNG: "Night Terrors", dedication plaque)
She was also listed on a USS Voyager crew manifest as an ensign, displayed on a computer screen in 2374. (VOY: "The Killing Game" set artwork)
Simmons was named for first and second assistant director Adele Simmons.