Market Research Companies in Bangkok

Key figures for researchers

Registered population

5.42 million (31 December 2025, household registration)¹

Largest province

more than twice Nakhon Ratchasima, the second (2.61 million) (2025)¹

Districts

50 districts (khet) and 180 subdistricts (khwaeng) (end of 2024)²

Area and density

1,568.74 km², about 3,477 registered residents per km² (2024)²

Births and deaths

45,685 births and 48,869 deaths (2025)³

Internet users

96.4% of people aged 6+ (Q4 2024)⁴

Mobile phone users

97.9% of people aged 6+ (Q4 2024)⁴

Households

97.5% have an internet connection, 36.7% a computer (Q4 2024)⁴

Rainy season

mid-May to mid-October⁵

Songkran

13–15 April (public holidays)⁶

Research guide

Research landscape

Bangkok is the commercial centre of Thailand and the base of most of the country’s research agencies: local full-service firms, offices of international networks, qualitative and B2B specialists, panel providers and field-only suppliers. Many of them run national studies from Bangkok with interviewer teams in the regions, and some also coordinate fieldwork in neighbouring Southeast Asian markets.

Bangkok is not run like the other provinces: it is managed by the Bangkok Metropolitan Administration, whose governor is elected directly by residents. It is also by far the most populous: its 5.42 million registered residents are more than twice the registered population of Nakhon Ratchasima, the second largest province.

Who you will interview

Official population figures for Bangkok come from household registration, not from a door-to-door count: they show the people whose names are registered in Bangkok. The registered population is shrinking slowly, from 5,455,020 in 2024 to 5.42 million at the end of 2025, and Bangkok recorded more deaths (48,869) than births (45,685) in 2025, so the city is ageing like the rest of the country. Estimates of the people actually living in Bangkok are higher: the Mahidol Population Gazette puts Bangkok at 8.3 million in mid-2026 (the figure used in our Thailand guide).

Central Thai is the standard language for questionnaires; English works for many B2B and executive interviews but rarely for the general public. For a Bangkok sample, set quotas on age, gender and district, and agree with the agency how residents who live in Bangkok but are registered elsewhere are covered.

Fieldwork in practice

Bangkok has 50 districts (khet) and 180 subdistricts (khwaeng) over 1,568.74 km², with about 3,477 registered residents per km². Districts are the usual basis for spreading face-to-face interviews across the city. Registration data is not always a reliable sampling frame: in a 2018 census pilot that included Bangkok, the National Statistical Office found about 30% differences between register data and the households found on the ground.

Connectivity is very high: 96.4% of people aged six and over used the internet and 97.9% used a mobile phone at the end of 2024, and 97.5% of households had an internet connection, but only 36.7% had a computer. Online surveys should be designed for smartphones first. Face-to-face (CAPI) or telephone interviews remain useful for older and lower-income residents.

Focus groups and qualitative research

Bangkok is the main location for in-person focus groups in Thailand, usually held in viewing facilities with a one-way mirror and video streaming, or in rented meeting rooms. Allow plenty of travel time for evening groups, especially in the rainy season, and choose a venue close to public transport.

Ask the agency for its Bangkok incentive levels, recruitment lead times and moderators’ experience; senior B2B respondents often prefer online interviews. Online communities and video interviews are widely used, alone or alongside in-person groups.

Timing

Avoid Songkran, the Thai New Year (13–15 April), and the days around it: the three days are public holidays and fieldwork slows down around them. Plan around the other public holidays, including the Buddhist holidays that move with the lunar calendar and the year-end period (see the Thailand guide).

The rainy season runs from mid-May to mid-October: heavy rain can slow travel across the city, so allow extra time for face-to-face interviews and group recruitment.

Working with a Bangkok agency

• Share a clear brief: objectives, target, sample size, districts or areas, method, languages and deadline.
• For face-to-face work, ask how the agency samples households across the 50 districts and how it reaches condominium and gated housing residents.
• For focus groups, ask for the venue address, viewing room capacity, streaming options and incentive levels.
• Ask about quality control: back-checks, GPS or audio checks, supervision of telephone calls and panel data cleaning.
• Compare several proposals: you can send one request to up to 5 Bangkok companies from this page.

National rules (data protection, holidays, sampling across regions) are covered in our guide to market research in Thailand.