Philippines's 1st senatorial district
Philippines's 1st senatorial district, officially the First Senatorial District of the Philippine Islands (), was one of the twelve senatorial districts of the Philippines in existence between 1916 and 1935. It elected two members to the Senate of the Philippines, the upper chamber of the bicameral Philippine Legislature under the Insular Government of the Philippine Islands for each of the 4th to 10th legislatures. The district was created under the 1916 Jones Law from the northern Luzon provinces of Batanes, Cagayan, Ilocos Norte, Ilocos Sur and Isabela. Abra was added in 1917 upon its re-establishment as a regular province separate from Ilocos Sur.

The district was represented by a total of six senators throughout its existence. It was abolished in 1935 when a unicameral National Assembly was installed under a new constitution following the passage of the Tydings–McDuffie Act which established the Commonwealth of the Philippines. Since the 1941 elections when the Senate was restored after a constitutional plebiscite, all twenty-four members of the upper house have been elected countrywide at-large. It was last represented by Elpidio Quirino and Melecio Arranz of the Nacionalista Democrático.
Q7450077
senatorial districts of the Philippines
Concept
Q1418426
Senate of the Philippines
MEDIA
Q1710866
Philippine Legislature
MEDIA
Q6042084
Insular Government of the Philippine Islands
ORG
Q4639404
4th
EVE
Q4547132
10th
EVE
Q2975536
Jones Law
MEDIA
Q125384
Luzon
LOC
Q13740
Batanes
LOC
Q13759
Cagayan
LOC
Q13813
Ilocos Norte
LOC
Q12741
Ilocos Sur
LOC
Q13826
Isabela
LOC
Q13711
Abra
LOC
Q1116283
National Assembly
ORG
Q3545938
Tydings–McDuffie Act
PER
Q146328
Commonwealth of the Philippines
LOC
Q7185224
1941 elections
UNK
Q7185289
constitutional plebiscite
Concept
Q3682992
at-large
Concept
Q319943
Elpidio Quirino
PER
Q1536288
Melecio Arranz
PER
Q302210
Nacionalista Democrático
ORG
Q96399224
Philippines's 1st senatorial district
UNK
1916-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1916
DATE
1935-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1935
DATE
1916-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1916
DATE
1917-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1917
DATE
1935-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1935
DATE
1941-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1941
DATE
+1^^http://www.w3.org/2001/XMLSchema#decimal
1
NUMBER
+4^^http://www.w3.org/2001/XMLSchema#decimal
4
NUMBER
+10^^http://www.w3.org/2001/XMLSchema#decimal
10
NUMBER
instance of
inception
dissolved, abolished or demolished date
country
legislative body
inception