Thank You is the follow-up to Ross's 2006 album I Love You, and was recorded entirely in her home studio during the pandemic.
"This collection of songs is my gift to you with appreciation and love," said the former Supremes singer in a statement.
"I am eternally grateful that I had the opportunity to record this glorious music at this time".
The title track, released at midnight on Thursday, is a shimmering gospel-pop song that recalls the star's Motown years - with a noticeable hat tip to Marvin Gaye and Tammi Terrell's You're All I Need To Get By.
