[3] The district consists of Quezon's capital city of Lucena and adjacent municipalities of Candelaria, Dolores, San Antonio, Sariaya and Tiaong.

[4] Prior to its second dissolution in 1972, the second district encompassed the eastern Quezon municipalities of Agdangan, Alabat, Atimonan, Buenavista, Calauag, Catanauan, General Luna, Guinayangan, Gumaca, Lopez, Macalelon, Mulanay, Padre Burgos, Pitogo, Plaridel, Quezon, San Andres, San Francisco, San Narciso, Tagkawayan, and Unisan.

In 1922, Padre Burgos, then known as Laguimanoc, became part of this district beginning in 1922 after being initially part of the first district since its creation as a municipality in 1917.

Marinduque, a former sub-province of Tayabas (now Quezon), was also part of this district until it was granted its own representation beginning in 1922, two years after its re-establishment as an independent province.

[5] Following the restoration of the Congress in 1987, the aforementioned municipalities were realigned into the new third and fourth districts, respectively, and this district was redefined to encompass the western part of Quezon, a configuration that remains up to date.