Collocations for census - noun

complete
federal, government, national, official, state
decennial
population

carry out (esp. BrE), conduct, perform (esp. AmE), take
A national census is taken every ten years.

find, indicate, report, reveal, show
count, list

data, figures, records, report (esp. AmE), results, statistics
form, questionnaire, return
tract (AmE)
bureau (AmE)
taker (esp. AmE)

in a/the census
the questions asked in the census