Topsail lies on eastern shore of Conception Bay and includes parts of the city of Mount Pearl and the towns of Conception Bay South and Paradise. The residential mix is suburban and sometimes rural, although many residents commute to St. John's.
The 2007 redistribution changed the district significantly. Fifty-four per cent of it was retained, 32 per cent moved to Conception Bay South, 10 per cent moved to Mount Pearl North and four per cent shifted to Conception Bay East-Bell Island. The district also gained 16 per cent of both Waterford Valley and Conception Bay East-Bell Island. (CBC Electoral District Profile)