In the mid 1990s, from various censuses, we estimate that nearly 100,000 people throughout the world carry the name Mercier. The largest concentrations are found in the following locations:

The Mercier name has been attributed to various geographic locations in Quebec. . According to the toponymy commission of Quebec in 1998, there were 112 locations which carried the Mercier name.

63 streets
28 lakes
19 creeks
16 trails
8 avenues
8 coves
7 canals
5 ilands
4 bridges
3 parks
2 boulevards
2 rivers
2 points
2 bays
2 place names
1 town
1 parish
1 township
1 electoral district
1 dam
1 strait
1 passage
1 pond
1 mountain
1 sommit
1 route
1 reception hall
1 post office
1 alley
1 building