[1] It elects one deputy to the lower house of Congress for each three-year legislative session by means of the first-past-the-post system.

Votes cast in the district also count towards the calculation of proportional representation ("plurinominal") deputies elected from the third region.

From 2017 to 2022, the 1st district comprised the municipalities of Cozumel, Lázaro Cárdenas, Solidaridad, Isla Mujeres and Tulum.

[9] The districting scheme in force from 1978 to 1996 was the result of the 1977 electoral reforms, which increased the number of single-member seats in the Chamber of Deputies from 196 to 300; Quintana Roo's allocation, however, remained at two.

[10] The 1st district comprised two of the state's (at the time) seven municipalities: José María Morelos and Othón P. Blanco, with the latter serving as its head town.