Tad the Lost Explorer and the Secret of King Midas (Spanish: Tadeo Jones 2: El secreto del Rey Midas; released outside of the UK and US as Tad Jones: The Hero Returns and Tad 2: The Secret of King Midas among other titles) is a 2017 Spanish 3D animated adventure comedy film co-directed by Enrique Gato (who directed the first film) and David Alonso. Produced by Ikiru Films, Telecinco Cinema, El Toro Pictures, Lightbox Entertainment and Telefónica Studios, it is a sequel to Tad, The Lost Explorer (2012).

The film had its world premiere at the Annecy International Animation Film Festival on 13 June 2017 and was theatrically released on 25 August 2017 in Spain by Paramount Pictures and was also released in the US on 1 December 2017, and in the UK on 9 February 2018 It had a worldwide gross of $35 million against a budget of €9 million ($11.8 million) making it a box office success. Like the first film, Tad the Lost Explorer and the Secret of King Midas received some negative reviews from American critics, but was very well received by Spanish critics, who even considered it superior to the first film. It won Best Animated Film at the 32nd Goya Awards, 5th Platino Awards, 73rd CEC Awards and 10th Gaudí Awards.

A third installment Tad, the Lost Explorer and the Emerald Tablet, was released in 2022.