Under the previous districting plans enacted by the INE and its predecessors, the 1st district was situated as follows:
2017–2022 :In the north-west of the state, covering the municipalities of Acambay, Aculco, Chapa de Mota, Jilotepec, Morelos, Polotitlán, Soyaniquilpan de Juárez, Temascalcingo, Timilpan and Villa del Carbón. The head town was at
Jilotepec de Molina Enríquez.
2005–2017 :In the north-west of the state, covering the municipalities of Acambay, Aculco, Atlacomulco, Jilotepec, Jocotitlán, Morelos, Polotitlán, Soyaniquilpan de Juárez y Timilpan. The head town was at
Jilotepec de Molina Enríquez.
1978–1996 :In the south-west of the state, covering the municipalities of
Almoloya de Alquisiras,
Amatepec,
Coatepec Harinas,
Ixtapan de la Sal,
Malinalco,
Ocuilan,
Otzoloapan,
San Simón,
Sultepec,
Tejupilco,
Tenancingo,
Texcaltitlán,
Tlatlaya,
Tonatico,
Villa Guerrero,
Zacazonapan,
Zacualpan and
Zumpahuacán, with its head town at
Tenancingo de Degollado. ==Deputies returned to Congress ==