You can search for Canadian Geographical names on the NRCan website…
http://gnss.nrcan.gc.ca/gnss-srt/searchName.jsp?language=en

The results will tell you what province and what county the community is in, today.

If you do not have the correct spelling, this website will not help. In which case a GOOGLE might.

Provincial road maps have alphabetical indexes, or search features (partial spellings) which might help you find a similar name. To find these, just GOOGLE on the name of province and keywords… road… map

Trois-Rivières is a city on the St Lawrence River, west of Quebec City. Today Trois-Rivières is in the Maurice region.

http://www.quebec511.gouv.qc.ca/en/carte_routiere/index.asp

http://www.quebec511.gouv.qc.ca/en/carte_routiere/mauricieS....

If you consult the census listings for Trois Rivieres…
http://www.collectionscanada.gc.ca/databases/census-microfil...

there are listings for Trois-Rivières the city and Trois-Rivières the county.
If you consult the actual census listings, the info at the top of the page will tell you where the census was taken… Province, County, community, although it might be written as District and Sub-District.

http://www.collectionscanada.gc.ca/databases/census-1901/001...

The agricultural schedules of earlier census should give you an exact address (lot and concession in Ontario) and tell you how much land they owned and all kinds of neat farming info.