Place comparison

Green Island compared with Miyako Island: area, population and density

Miyako Island has more than ten times Green Island land and more than eleven times its registered population.

Place A Grouped by country or region Place B Grouped by country or region

Equal-area outline comparison

Outlines are centered and scaled by official land area; position does not show geographic location.

Area

Population

Population density

Area data date

Population data date

The guide below belongs to this pair: Green Island and Miyako Island. Change the selector above and the page follows, so the reading always matches the tool.

Direct answer

How different are Green Island and Miyako Island?

Green Island covers 15.1 km² (5.83 sq mi); Green Island's area is about 9.5% of Miyako Island's. Its reported population is 4,327; Green Island's population is about 8.6% of Miyako Island's. By average density, Green Island's population density is about 90.5% of Miyako Island's.

Area difference

Green Island's area is about 9.5% of Miyako Island's 15.1 km² (5.83 sq mi) · 158.5 km² (61.2 sq mi)

Population difference

Green Island's population is about 8.6% of Miyako Island's 4,327 · 50,218

Density difference

Green Island's population density is about 90.5% of Miyako Island's 286.7 /km² (743 /sq mi) · 316.8 /km² (820 /sq mi)

Full data and sources for each place: Green Island area & population, Miyako Island area & population

Straight-line distance between geometric centres: about 456 km; time difference: 1 hour.

On a familiar scale

Green Island ≈ 26% of Manhattan (reference rung) 3,488 m² of land per resident
Miyako Island ≈ the size of Washington, D.C. (reference rung) 3,157 m² of land per resident

Reference scales come from U.S. Census Bureau: 2025 Gazetteer Files: land area of states and counties , as of 2025-01-01.

How to read it

Both records are close to island-level alignment, making this a cleaner comparison than pairs that rely on county or city archipelagos.

Geography and shape

Green Island is a compact volcanic island off southeast Taiwan. Miyako is a much larger, low-lying limestone island in Okinawa. The shared scale makes the order-of-magnitude difference clearer than separate tourist maps.

Population context

Miyako has over eleven times the reported residents, while its land is over ten times larger. Its island-wide density is therefore only modestly above Green Island in the current records, despite the much larger totals.

Boundaries and definitions

Miyako excludes other islands administered by Miyakojima City. Green Island pairs its physical island with township registered population. Population systems differ by country, but the geographic scope is unusually well matched.

Green Island: Physical Green Island area paired with the registered population of Green Island Township at year-end 2025. The township and main island are nearly coextensive, but the population remains an administrative count.

Miyako Island: Miyako Island only. Population excludes Ikema, Kurima, Ogami, Irabu and Shimoji islands, even though all are part of Miyakojima City.

In-depth guide

How should Green Island and Miyako Island be understood in context?

This pair turns two familiar travel names into one shared scale. Miyako is more than ten times larger, yet the density difference is much smaller than the land difference.

Two island records with unusually close boundaries

Miyako data exclude the other islands of Miyakojima City. Green Island township is nearly coextensive with the physical island.

That makes the pair useful for cross-border scale even though Japanese and Taiwanese registration systems are not identical.

A larger island can keep a similar average

Miyako land and population rise by broadly similar multiples from Green Island, so average density changes much less than either total.

Neither average tells where hotels, settlements or beaches cluster.

Questions people ask

About this geographic comparison

Which is bigger, Green Island or Miyako Island?

Miyako Island is bigger, with a land area about 10.5× that of Green Island (Green Island 15.1 vs Miyako Island 158.5 km², or 5.83 sq mi vs 61.2 sq mi).

How big is Green Island compared to Miyako Island?

Miyako Island has 158.5 km² (61.2 sq mi) and Green Island has 15.1 km² (5.83 sq mi): the ratio is 10.5×. Conversely, Green Island has 9.5% of Miyako Island's area.

Does Green Island or Miyako Island have more people?

Miyako Island has 50,218 people (2024-12-31), versus 4,327 in Green Island (2025-12-31): 11.6×. In reverse, Green Island has 8.6% of Miyako Island's population. Green Island is 9.5% the size of Miyako Island — 15.1 km² vs 158.5 km² (5.83 sq mi vs 61.2 sq mi). Population is 8.6% as high; average density is 90.5% as high. Each side’s scope and reference date are set out under “Boundaries and definitions” on this page.

Is Green Island bigger than Miyako Island?

No. Miyako Island is bigger, with a land area about 10.5× that of Green Island (Green Island 15.1 vs Miyako Island 158.5 km², or 5.83 sq mi vs 61.2 sq mi). The area difference is 143.4 km². Miyako Island has 158.5 km² (61.2 sq mi) and Green Island has 15.1 km² (5.83 sq mi): the ratio is 10.5×. Conversely, Green Island has 9.5% of Miyako Island's area.

How many Green Islands fit inside Miyako?

A little over ten by reported land area.

Does Miyako include the whole city?

No. The record excludes the other islands administered by Miyakojima City.

Which island is denser?

Miyako is modestly higher in the current registered-population records.

Sources

Outline data: