Rayong

Last updated: November 2026

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Area profile: Rayong

Everything we know about this area, from official Thai government and open sources.

Official land appraisal (municipal area)

Median appraisal

฿400 / sq. wah

Construction cost (province median)

People

789,730+5.1% since 2021

Gender split

Registered houses

594,435

Population density

214.5 people / km²

People per house

1.3

Environment

Air quality

Province-level reading

PM2.5 annual mean

25.9 µg/m³

WHO guideline: 5 µg/m³ PM2.5 / 15 µg/m³ PM10. Thai standard: 15 µg/m³ PM2.5 / 50 µg/m³ PM10.

Terrain & climate

Elevation range

443.8 m

Daily high / low

30.2°C

Monthly rainfall

1,620 mm / year

Flood exposure

Check a specific address on the flood history map

Flash-flood terrain susceptibility

Sinkhole susceptibility (DMR)

Height above nearest drainage (10th percentile)

-26.1 m

Distance to nearest stream (10th percentile)

1,040.7 m

Terrain slope (90th percentile)

1.5%

Drought

Rainfall deficit vs 1981–2010+ normal (CHIRPS) — a meteorological reading, not soil moisture, and not a forecast.

Latest 3-month rainfall vs normal

151.6%

Share of 10-day periods in deficit (10y)

13.6%

Worst 3-month deficit (10y)

26.6%

Air quality

PM2.5 — OpenAQ

Reference-grade station

25.9 µg/m³

Low-cost sensor

19.7 µg/m³

Map of Rayong

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Frequently asked about Rayong

What's near Rayong?

Rayong has 8 supermarkets, 6 shopping centers, 24 hospitals, 21 parks, and 1,106 restaurants and cafés nearby, based on OpenStreetMap data. Nearby options include Makro food service, Robinson, and CK Plaza.

What's the air quality like in Rayong?

Rayong's annual mean PM2.5 is 25.9 µg/m³, against a WHO guideline of 5 µg/m³ and a Thai standard of 15 µg/m³. This is a Province-level-level reading, not a station within the area itself.

Is Rayong at risk of flooding?

Rayong's flash-flood terrain susceptibility is Low. Sinkhole susceptibility (DMR survey) is Very high.

What's the population of Rayong?

Rayong has a registered population of 789,730 (+5.1% since 2021).

What is the official land appraisal price in Rayong?

The Treasury Department's official land appraisal for Rayong (this subdistrict) is ฿400 per square wah (median) — an assessed value used for transfer fees and taxes, not a market price.

How much rain does Rayong get?

Rayong receives an average of 1,620 mm of rainfall per year, based on long-term climate data.

How bad is air pollution in Rayong?

According to OpenAQ reference-grade monitoring stations, the annual mean PM2.5 level in Rayong is 25.9 µg/m³.