Roi Et

Last updated: November 2026

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Area profile: Roi Et

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

Official land appraisal (municipal area)

Median appraisal

฿200 / sq. wah

Construction cost (province median)

People

1,269,448−2.0% since 2021

Gender split

Registered houses

422,603

Population density

162.4 people / km²

People per house

3

Environment

Air quality

Province-level reading

PM2.5 annual mean

24.1 µg/m³

PM10 annual mean

43.7 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

41.7 m

Monthly rainfall

1,341 mm / year

Flood exposure

Check a specific address on the flood history map

Flash-flood terrain susceptibility

Sinkhole susceptibility (DMR)

Not assessed by DMR — this area has not been surveyed for sinkhole susceptibility.

Height above nearest drainage (10th percentile)

-0.3 m

Distance to nearest stream (10th percentile)

2,105 m

Terrain slope (90th percentile)

0.1%

Drought

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

Latest 3-month rainfall vs normal

93.5%

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

17.8%

Worst 3-month deficit (10y)

33.8%

Air quality

PM2.5 — OpenAQ

Reference-grade station

24.1 µg/m³

Low-cost sensor

19 µg/m³

PM10 — OpenAQ

Reference-grade station

43.7 µg/m³

Low-cost sensor

21.1 µg/m³

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Frequently asked about Roi Et

What's near Roi Et?

Roi Et has 6 supermarkets, 3 shopping centers, 20 hospitals, 7 parks, and 83 restaurants and cafés nearby, based on OpenStreetMap data. Nearby options include Roi Et Plaza, Robinson Lifestyle, and Robinson Roi-Et.

What's the air quality like in Roi Et?

Roi Et's annual mean PM2.5 is 24.1 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 Roi Et at risk of flooding?

Roi Et's flash-flood terrain susceptibility is Low.

What's the population of Roi Et?

Roi Et has a registered population of 1,269,448 (−2.0% since 2021).

What is the official land appraisal price in Roi Et?

The Treasury Department's official land appraisal for Roi Et (this subdistrict) is ฿200 per square wah (median) — an assessed value used for transfer fees and taxes, not a market price.

How much rain does Roi Et get?

Roi Et receives an average of 1,341 mm of rainfall per year, based on long-term climate data.

How bad is air pollution in Roi Et?

According to OpenAQ reference-grade monitoring stations, the annual mean PM2.5 level in Roi Et is 24.1 µg/m³.