  The Local Group Census is a narrow- and broad-band survey of all the galaxies
of the Local Group above dec = -30 deg, in progress at the 2.5m Isaac Newton
telescope on La Palma. We discuss here the ability of the survey to detect
symbiotic star candidates in the Local Group, by deriving detection limits in
each of the narrow- and broad-band frames used in the survey, and by estimating
the total number of objects expected in each galaxy. We present two diagnostic
diagrams, based on the adopted photometric filters, to discriminate between
symbiotic stars and other emission-line objects such as planetary nebulae.
