Ambos Camarines's 1st congressional district

Ambos Camarines's 1st congressional district is a defunct congressional district that encompassed the northern and western portions of the former province of Ambos Camarines. It was represented in the Philippine Assembly from 1907 to 1916 and in the House of Representatives of the Philippine Islands from 1916 to 1919. The Spanish colonial province of Ambos Camarines was reorganized under the Insular Government of the Philippine Islands on April 27, 1901 and was divided into three districts. Tomás Arejola, who was a former member of the Malolos Congress for Ambos Camarines's at-large district in 1898, was elected as this district's first representative in 1907. Following its repartition into Camarines Norte and Camarines Sur on March 3, 1919, the district was abolished with its northern territory having been absorbed by Camarines Norte's at-large congressional district.

Representation history
{| class=wikitable ! rowspan="2" | # ! rowspan="2" colspan=2 | Member ! colspan=2 | Term of office ! rowspan="2" | Legislature ! rowspan="2" | Party ! rowspan="2" | Electoral history ! rowspan="2" | Constituent LGUs !Start!!End
 * colspan="9" style="text-align:center;" |
 * colspan="9" style="text-align:center;" |

Ambos Camarines's 1st district for the Philippine Assembly

 * colspan="9" style="text-align:center;" | District created January 9, 1907.
 * rowspan="2" style="text-align:center;" | 1
 * rowspan="2" style="background:;" |
 * rowspan="2" | Tomás Arejola
 * rowspan="2" | October 16, 1907
 * rowspan="2" | October 16, 1912
 * style="text-align:center;" | 1st
 * rowspan="2" | Nacionalista
 * Elected in 1907.
 * style="text-align:center;" | 1907–1909 Capalonga, Daet, Gainza, Indan, Labo, Libmanan, Lupi, Mambulao, Milaor, Minalabac, Pamplona, Paracale, Pasacao, Ragay, San Fernando, Sipocot
 * style="text-align:center;" | 2nd
 * Re-elected in 1909.
 * rowspan="2" style="text-align:center;" | 1909–1916 Basud, Capalonga, Daet, Gainza, Indan, Labo, Libmanan, Lupi, Mambulao, Milaor, Minalabac, Pamplona, Paracale, Pasacao, Ragay, San Fernando, Sipocot, Talisay
 * style="text-align:center;" | 2
 * style="background:;" |
 * Silverio D. Cecilio
 * October 16, 1912
 * October 16, 1916
 * style="text-align:center;" | 3rd
 * Nacionalista
 * Elected in 1912.
 * colspan="9" style="text-align:center;" |
 * style="text-align:center;" | 3rd
 * Nacionalista
 * Elected in 1912.
 * colspan="9" style="text-align:center;" |
 * colspan="9" style="text-align:center;" |

Ambos Camarines's 1st district for the House of Representatives of the Philippine Islands

 * style="text-align:center;" | 3
 * style="background:;" |
 * Gonzalo S. Escalante
 * October 16, 1916
 * June 3, 1919
 * style="text-align:center;" | 4th
 * Nacionalista
 * Elected in 1916.
 * style="text-align:center;" | 1916–1919 Basud, Cabusao, Capalonga, Daet, Gainza, Indan, Labo, Libmanan, Lupi, Mambulao, Milaor, Minalabac, Pamplona, Paracale, Pasacao, Ragay, San Fernando, Sipocot, Talisay
 * colspan="9" style="text-align:center;" | District dissolved into Camarines Norte's at-large and Camarines Sur's 1st districts.
 * }
 * colspan="9" style="text-align:center;" | District dissolved into Camarines Norte's at-large and Camarines Sur's 1st districts.
 * }