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By County - Shows all known census records, their microfilm numbers (LAC & LDS), and their transcription status

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Keep in mind that census districts and sub-districts (townships) were voting districts and not actual “counties”.
Although the census district may have the same name as a county, it may not include the same townships (subdistricts).
How Canadian Census are Organized (pdf)

Years without a link indicate that no census records are available, or the records were enumerated as part of another county

	pre 1851	1851	1861	1871	1881	1891	1901	1911
Algoma District			ALG	ALG	ALG	ALG	ALG	ALG
Brant County	BRA	BRA	BRA	BRA	BRA	BRA	BRA	BRA
Bruce County		BRU	BRU	BRU	BRU	BRU	BRU	BRU
Carleton County	CAR	CAR	CAR	CAR	CAR	CAR	CAR	CAR
Dufferin County	Prior to 1911 see Wellington, Grey, Simcoe							DUF
Dundas County		DUN	DUN	DUN	DUN	DUN	DUN	DUN
Durham County	DUR	DUR	DUR	DUR	DUR	DUR	DUR	DUR
Elgin County	ELG	ELG	ELG	ELG	ELG	ELG	ELG	ELG
Essex County	ESS	ESS	ESS	ESS	ESS	ESS	ESS	ESS
Frontenac County	FRO	FRO	FRO	FRO	FRO	FRO	FRO	FRO
Glengarry County		GLE	GLE	GLE	GLE	GLE	GLE	GLE
Grenville County	GVL	GVL	GVL	GVL	GVL	GVL	GVL	GVL
Grey County		GRY	GRY	GRY	GRY	GRY	GRY	GRY
Haldimand County	HLD	HLD	HLD	HLD	HLD	HLD	HLD	HLD
Halton County	HTN	HTN	HTN	HTN	HTN	HTN	HTN	HTN
Hastings County		HAS	HAS	HAS	HAS	HAS	HAS	HAS
Huron County	HUR	HUR	HUR	HUR	HUR	HUR	HUR	HUR
Kent County		KEN	KEN	KEN	KEN	KEN	KEN	KEN
Lambton County		LAM	LAM	LAM	LAM	LAM	LAM	LAM
Lanark County	LNK	LNK	LNK	LNK	LNK	LNK	LNK	LNK
Leeds County	LEE	LEE	LEE	LEE	LEE	LEE	LEE	LEE
Lennox & Addington County		LnA	LnA	LnA	LnA	LnA	LnA	LnA
Lincoln County	LIN	LIN	LIN	LIN	LIN	LIN	LIN	LIN
Manitoulin District	See Algoma			MAN	See Algoma
Middlesex County	MID	MID	MID	MID	MID	MID	MID	MID
Muskoka District				MUS	MUS	MUS	MUS	MUS
Nipissing District			NIP	NIP		NIP	NIP	NIP
Norfolk County	NRF	NRF	NRF	NRF	NRF	NRF	NRF	NRF
Northumberland County	NUL	NUL	NUL	NUL	NUL	NUL	NUL	NUL
Ontario County		ONT	ONT	ONT	ONT	ONT	ONT	ONT
Oxford County		OXF	OXF	OXF	OXF	OXF	OXF	OXF
Parry Sound District				PSD	Prior to 1911 See Muskoka			PSD
Peel County		PEE	PEE	PEE	PEE	PEE	PEE	PEE
Perth County	PER	PER	PER	PER	PER	PER	PER	PER
Peterborough County	PET	PET	PET	PET	PET	PET	PET	PET
Prescott County	PRE	PRE	PRE	PRE	PRE	PRE	PRE	PRE
Prince Edward County		PED	PED	PED	PED	PED	PED	PED
Rainy River District	Prior to 1911 See Algoma							TBRR
Renfrew County	REN	REN	REN	REN	REN	REN	REN	REN
Russell County	RUS		RUS	RUS	RUS	RUS	RUS	RUS
Simcoe County	SIM	SIM	SIM	SIM	SIM	SIM	SIM	SIM
Stormont County		STO	STO	STO	STO	STO	STO	STO
Thunder Bay	Prior to 1911 See Algoma							TBRR
Victoria County		VIC	VIC	VIC	VIC	VIC	VIC	VIC
Waterloo County	WAT	WAT	WAT	WAT	WAT	WAT	WAT	WAT
Welland County	WLD	WLD	WLD	WLD	WLD	WLD	WLD	WLD
Wellington County	WGT	WGT	WGT	WGT	WGT	WGT	WGT	WGT
Wentworth County	WTW	WTW	WTW	WTW	WTW	WTW	WTW	WTW
York County	YOR	YOR	YOR	YOR	YOR	YOR	YOR	YOR
Addington County	See Lennox & Addington
Bathurst District	See Carleton, Lanark, Renfrew
Bothwell County*	See Kent, Lambton
Brock District	See Oxford, Brant
Cardwell County*	See Dufferin, Peel, Simcoe, York
Cochrane District	See Algoma, Nipissing
Colborne District	See Peterborough
Cornwall District	See Stormont
Dalhousie District	See Carleton
Eastern District	See Dundas, Glengarry, Prescott, Russell, Stormont
Gore District	See Halton, Haldimand, Lincoln
Haliburton County	See Peterborough, Victoria
Home District	See Durham, Simcoe, York
Johnstown District	See Leeds, Grenville, Carleton, Lanark, Renfrew
Kenora District	See Algoma, Thunder Bay & Rainy River
London District	See Middlesex, Elgin, Brant, Haldimand, Oxford
Midland District	See Lennox & Addington, Frontenac
Monck County*	See Haldimand, Lincoln, Welland
Newcastle District	See Durham, Northumberland, Victoria
Niagara	See Lincoln, Welland
Ottawa District	See Prescott, Russell
Sudbury District	See Algoma, Nipissing
Talbot District	See Norfolk
Temiskaming District	See Nipissing
Western District	See Essex, Kent, Lambton

* Bothwell, Cardwell and Monck existed for census and election purposes only.

For more on the history of any of these counties and districts, See OntarioGenWeb’s Research By Area pages.

©OntarioGenWeb’s Census Project 1999-
Established 1 March 1999. Founders and Coordinators: Sherri Pettit, Suzanne Schaller, Joan Hapeman-Somers and K.St-Louis