Legislative Districts Population Disparity and the Right to Equal Representation

The 1987 Constitution guarantees every province at least one representative in Congress, but how much population must each legislative district have? In Aquino III v. Commission on Elections (G.R. No. 189793, April 7, 2010), the Supreme Court answered this question, ruling that the Constitution does not impose a strict 250,000 population minimum for creating additional districts within a province. The decision clarifies the balance between population equality and other factors like geography, language, and community interests.

The Case: Reapportioning Camarines Sur

Republic Act No. 9716, signed into law in October 2009, reconfigured the first and second legislative districts of Camarines Sur to create a new fifth district. Before the law, the province had four districts with populations ranging from roughly 372,000 to 475,000. After reapportionment, the new first district had only about 176,000 people, while other districts had between 277,000 and 439,000.

Senator Benigno Aquino III and Naga City Mayor Jesse Robredo challenged the law, arguing it violated the constitutional requirement that each legislative district have at least 250,000 inhabitants.

The Constitutional Provision in Question

The petitioners relied on Section 5(3), Article VI of the 1987 Constitution, which states: "Each legislative district shall comprise, as far as practicable, contiguous, compact, and adjacent territory. Each city with a population of at least two hundred fifty thousand, or each province, shall have at least one representative."

The petitioners argued that the 250,000 figure was a minimum population requirement for any new legislative district. They reasoned that the Constitutional Commission used this number when originally apportioning 200 seats based on a projected national population of 55 million.

The Court's Ruling: No Fixed Minimum for Provinces

The Supreme Court dismissed the petition and upheld RA 9716 as constitutional. The Court held that a plain reading of Section 5(3) shows the 250,000 population requirement applies only to cities, not provinces. A province is entitled to at least one representative by the mere fact of its existence, regardless of population.

The Court also cited Mariano, Jr. v. COMELEC, which held that even for cities, the 250,000 requirement applies only to the initial district, not to additional ones. If a city does not need another 250,000 people for each new district, neither should a province.

Population Is Not the Only Factor

The Court emphasized that the Constitution does not require mathematical exactitude in district populations. Rather, districts should be "contiguous, compact, and adjacent" as far as practicable. The framers' deliberations showed that factors like language, geography, natural boundaries, and community interests were considered alongside population when drawing district lines.

In Bagabuyo v. COMELEC, the Court had already stated that the Constitution "does not require mathematical exactitude or rigid equality as a standard in gauging equality of representation." Population disparity alone does not render a reapportionment unconstitutional.

Practical Takeaways

• No fixed population floor for provincial districts. The 250,000 figure in Section 5(3), Article VI applies only to cities seeking their first representative, not to additional districts within provinces.
• Population disparity is not automatically unconstitutional. Courts will uphold reapportionment laws even with unequal district populations, provided districts are contiguous, compact, and adjacent as far as practicable.
• Legislative discretion is broad. Congress has wide latitude in reapportioning districts, and courts will presume the constitutionality of such laws unless there is a clear constitutional violation.
• Other factors matter. Language, geography, natural boundaries, and common interests can justify district configurations that deviate from strict population equality.
• Procedural rules may be relaxed. In cases of transcendental importance, the Supreme Court may set aside technical procedural objections and standing requirements to decide the substantive constitutional issue.

This article is general information and not legal advice. For your specific situation, consult a lawyer or ask ASG Legal AI.