2017–2022 :The 2017 redistricting process assigned Quintana Roo its
4th district. From 2017 to 2022, the 1st district comprised the municipalities of Cozumel, Lázaro Cárdenas, Solidaridad,
Isla Mujeres and
Tulum.
2005–2017 :The 2005 districting scheme created the state's
3rd district. Between 2005 and 2017 the 1st district covered the municipalities of Cozumel, Isla Mujeres, Lázaro Cárdenas, Solidaridad, Tulum, and the non-urban area of
the municipality of Benito Juárez (i.e., excluding the city and resort of
Cancún). Its head town was the city of Playa del Carmen.
1978–1996 :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. 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.
Prior to 1978 :Quintana Roo was admitted to the union on 8 October 1974. Prior to that, as a federal territory, it was assigned only one seat in the Chamber of Deputies: for the first district. The
2nd district was created upon statehood in 1974, halving the territory of the 1st district. ==Deputies returned to Congress ==