Thinouia restingae is known only from restinga vegetation, ombrophilous and semi-deciduous forests in the states of Bahia, Espírito Santo, and Rio de Janeiro, Brazil.
Thinouia restingae is represented by records distributed by the Atlantic Coast within an EOO of 95,642.60 km² and AOO of 58.00 km² in antropically modified restinga vegetation in the states of Rio de Janeiro and Espírito Santo, and in the semi-deciduous e ombrophilous forests in the states of Bahia, Espírito Santo, and Rio de Janeiro, Brazil. Thus, it should be regarded as Vulnerable, due to its range of distribution being less than 100 km ² and the number of locations being ≤10. Additionality, these species have a continually declining habitat quality, principally in the restinga vegetation where it faces intense pressure from human occupation.