Collocations for sector - noun

important, key
growing, growth
independent (BrE), private
public, state
non-profit (esp. AmE), voluntary (BrE)
economic, industry, market
The survey covers a wide range of industry sectors.

agricultural, business, commercial, corporate, export, industrial, manufacturing, media, retail, service
banking, financial, financial services (esp. BrE)
energy, oil
electronics, high-tech, tech, technology, telecom (esp. AmE), telecommunications, telecoms (BrE)
education, schools (BrE), university (esp. BrE)
the chronic underfunding of the education sector

health, health-care
tourism, tourist (esp. BrE)
consumer, household (esp. AmE)

in a/the sector
He went on to a successful career in the private sector.
employment opportunities in the higher education sector

a sector of the economy, a sector of the industry, a sector of the market

rural, urban
northern, north-eastern, etc.

divide sth into
Berlin was divided into four sectors after the war.

a sector of the city
a sector of society, a sector of the population