On the 1881 census, “age” means “age at next birthday”.
These entries are all from an index, I have not seen the originals.

British Columbia

Yale County

Lytton, Cache [?] Creek, Spence's Bridge, and Kamloop, Yale County
District 189, Sub-District [?], Page 28
Dwelling #142, Family #146

William Tinline, male, age 41, born in Ontario, Presbyterian, of Scotch origin, occupation - cook, unmarried. Apparently working at a hotel or a mine.

Manitoba

Selkirk County

Springfield, Selkirk County
FHL Film #1,375,918, District 183, Sub-District E, Page 11
Family #47

Edward B. Tinling, male, married, age 31, English, born in England.
Elizabeth C. Tinling, female, married, age 24, English, born in E. India.
Frances M.A. Tinling, female, age 3, English, born in England.
Irene V. Tinling, female, age less than 1, English, born in Manitoba.
Frances Humphrys, female, age 22, Irish, born in Ontario.
William J. Keyes, male, age 21, Irish, born in Ontario.

Ontario

Bothwell County

Orford, Bothwell County
FHL Film #1,375,912, District 178, Sub-District B, Division 3, Page 14
Family #64

William Tinline, male, married, age 55, Scottish, born in Scotland.
Margaret Tinline, female, married, age 56, Scottish, born in Scotland.
William Tinline, male, age 21, Scottish, born in Ontario.
Jannett Tinline, female, age 21, Scottish, born in Ontario.
Hannah Tinline, female, age 19, Scottish, born in Ontario.
Elisabeth S. Tinline, female, age 16, Scottish, born in Ontario.

[same as above]
Family #66

John Tinline, male, married, age 59, Scottish, born in Scotland.
Jane Tinline, female, married, age 58, Scottish, born in Ontario.
James Tinline, male, age 23, Scottish, born in Ontario.
Jannet Tinline, female, age 20, Scottish, born in Ontario.
Hannah Tinline, female, age 17, Scottish, born in Ontario.

[same as above, but Page 18]
Family #86

James Tinline, male, married, age 48, Scottish, born in Scotland.
Mary Tinline, female, married, age 46, Scottish, born in Scotland.
Isabella Tinline, female, age 22, Scottish, born in Scotland.
James Tinline, male, age 19, Scottish, born in Scotland.
John Tinline, male, age 18, Scottish, born in Scotland.
George Tinline, male, age 12, Scottish, born in Scotland.
Maggy Tinline, female, age 8, Scottish, born in Scotland.
William Tinline, male, age 5, Scottish, born in Ontario.
Anna Bryden, female, age 10, born in Ontario.

Brant North County

Dumfries South, Brant North County
FHL Film #1,375,900, District 160, Sub-District C, Division 3, Page 15-16
House #71, Family #71

John H. Maus, male, age 31, German, born in Ontario, religion = “Up. Presb.”, farmer, not married.
Margret Finling, female, widow, age 84, Scottish, born in USA, Up. Presb., widow.
Mary Wright, female, age 78, Scottish, born in USA, Up. Presb., unmarried.
Margret F. Finlling, female, single, age 5, Scottish, born in USA, Up. Presb. [i.e. Margaret T. Tinling, age 55]
John S. Finling, male, age 46, Scottish, born in Ontario, religion = “C. Presb.”, builder.

Elgin East County

Malahide, Elgin East County
FHL Film #1,375,902, District 163, Sub-District D, Division 2, Page 57
Family #315

Edgar Tinline, male, married, age 27, English, born in Ontario.
Mary Tinline, female, married, age 26, English, born in Ontario.
Maitland Tinline, male, age 5, English, born in Ontario.
Egerton Tinline, male, age 3, English, born in Ontario.
Claud Tinline, male, age less than 1, English, born in Ontario.

[Searched original film of Yarmouth Township, but did not find any Tinline families there in 1881.  That’s where Edgar was living with his parents in 1871].

Essex County

Colchester North, Essex County
FHL Film #1,375,916, District 181, Sub-District D, Page 72
Family #359

James Tinlin, male, married, age 57, Scottish, born in Ontario, ship carpenter.
Martha Tinlin, female, married, age 58, English, born in Ontario.  [One index says Mirtha.]
Ely Tinlin, male, age 26, Scottish, born in Ontario, farmer.  [One index says Eli.]
Philip Tinlin, male, age 24, Scottish, born in Ontario.  [One index says age 21.]
William Tinlin, male, age 17, Scottish, born in Ontario.
Annie Tinlin, female, age 20, Scottish, born in Ontario.
Hilliard Clark, male, age 10, Scottish, born in Ontario.
John Clark, male, age 8, Scottish, born in Ontario.

All belong to the Church of England.

Lincoln County

St. Catherines, Lincoln County
FHL Film #1,375,890, District 145, Sub-District A, Division 3, Page 65
Family #337

George M. Tinlin, male, married, age 40, Scottish, born in Ontario.
Emma Tinlin, female, married, age 24, English, born in USA.
Ellen Tinlin, female, age 1, Scottish, born in Ontario.
[+ 3 Irish boarders]

St. Catherines, Lincoln County
FHL Film #1,375,890, District 145, Sub-District A, Division 5, Page 25
Family #120

William Tinline, male, married, age 50, Scottish, born in Ontario.
Mary A. Tinline, female, married, age 43, Irish, born in Ontario.
Mariah Tinline, female, age 22, born in Ontario.
William Tinline, male, age 20, born in Ontario.
John J. Tinline, male, age 18, born in Ontario.
Alfred Tinline, male, age 14, born in Ontario.
George Tinline, male, age 10, born in Ontario.
Edith E. Tinline, female, age 8, born in Ontario.
Alice M. Tinline, female, age 6, born in Ontario.
Sarah M. Tinline, female, age 4, born in Ontario.
[The children were all marked (with ditto marks) as being Irish like their mother.]

Louth, Lincoln County
FHL Film #1,375,890, District 145, Sub-District C, Division 2, Page 22
Family #97

James Tinlin, male, married, age 58, Scottish, born in Ontario.
Elizabeth A. Tinlin, female, married, age 51, English, born in USA.
Sarah E. Dunn, female, age 23, born in Ontario.

Beamsville, Lincoln County
FHL Film #1,375,891, District 145, Sub-District H, Page 7
Family #37

William S. Tinlin, male, married, age 54, Scottish, born in Ontario.
Rodah Tinlin, female, married, age 48, English, born in Ontario.
Murray Walker, male, married, age 21, Irish, born in Ontario.

Monck County

Moulton, Monck County
FHL Film #1,375,890, District 144, Sub-District C, Division 2, Page 13
Family #58 [living in the home of John and Leah Emerson:]

Cornelia Tinline, female, age 21, Scottish, born in Ontario.
[apparently working as the domestic help].

Waterloo South County

Dumfries North, Waterloo South County
District 161, Sub-District B, Division 2, Page 43
Family #200

Kate Tinnling, female, age 39, born in Ontario, Scottish, school teacher, C. Presbyterian

Wentworth County

Ward 1, Hamilton, Wentworth County
FHL Film #1,375,892, District 149, Sub-District A, Division 1, Page 10
Family #41 [in index under Linling]

Mary Tinling, female, widow, age 43, Swiss, born in Barbados, Church of England.
Eliza Dallas, female, age 32, Swiss, born in West Indies, Church of England.
Charles Tinling, female [sic], age 14, Swiss, born in Barbados, clerk, Church of England.
Harry Tinling, male, age 15, Swiss, born in Barbados, clerk, Church of England.
Hugh Tinling, male, age 12, Swiss, born in Barbados, Church of England.
May Tinling, female, age 9, Swiss, born in Barbados, Church of England.
Jenny Wolfe, female, age 18, Irish, born in Ontario, servant, Roman Catholic.
[Note: I doubt that the family is Swiss, it is probably a misreading.]

Ward 2, Hamilton, Wentworth County
FHL Film #1,375,892, District 149, Sub-District B, Division 3, Page 35
Family #172

Alexa McNaughton, male, married, age 88, Scottish, born in Scotland.
Jennet McNaughton, female, married, age 67, Scottish, born in Scotland.
Margaret Logan, female, age 40, Scottish, born in Ontario.
Lizzie Tinline, female, age 30, Scottish, born in Ontario.
Janet Hume, female, age 20, Scottish, born in Ontario.

Wentworth North County

Flamborough West, Wentworth North County
FHL Film #1,375,892, District 148, Sub-District C, Division 1, Page 5
Family #533

William George, male, married, age 69, English, born in England.
Ann George, female, married, age 64, English, born in England.
Sarah Tinline, female, widow, age 35, English, born in England.

Wentworth South County

Binbrook, Wentworth South County
District 147, Sub-District B, Division 1, Page 19
Dwelling #89 [in index under Tinelian]

Francis Tinline, male, age 71, widower, born in Scotland, Scottish, farmer, C. Presbyterian.
Isabelle Tinline, female, age 18, born in Scotland, Scottish, C. Presbyterian.
Dinah Brims, female, age 40, born in Scotland, Scottish, C. Presbyterian.

York County

St. Thomas Ward, Toronto, York County
FHL Film #1,375,882, District 134, Sub-District C, Division 2, Page 81
Family #407

John Tinline, male, married, age 34, Scottish, born in Ontario.
Charlotte Tinline, female, married, age 25, English, born in Ontario.
Catherine Nuthall, female, widow, age 66, English, born in England.
Samuel Nuthall, male, age 21, English, born in Ontario.

York North County

King, York North County
FHL Film #1,375,885, District 137, Sub-District A, Division 3, Page 22
Family #104

Cathrine Tinline, female, age 42, Scottish, born in Scotland.
Margret Tinline, female, age 37, Scottish, born in Ontario.
Elizabeth Tinline, female, age 28, Scottish, born in Ontario.

Whitchurch, York North County
FHL Film #1,375,885, District 137, Sub-District C, Page 7
Family #36 [in index under Tenhisse]

William Tinline, married, male, age 26, Scottish, born in Ontario, servant, C. Methodist.
Phoebe Tinline, married, female, age 19, English, born in Ontario, C. Methodist.
Milton Tinline, male, age 1, Scottish, C. Methodist.

Aurora, York North County
FHL Film #1,375,885, District 137, Sub-District D, Page 6
Family #29

James Tinlin, male, [married status not listed], age53, Scottish, born in Scotland.
Margaret Tinlin, female, married, age 50, English, born in England.
Francis Tinlin, male, age 29, Scottish, born in Ontario.
James Tinlin, male, age 23, Scottish, born in Ontario.
Wharton Tinlin, male, age 21, Scottish, born in Ontario.  [Index actually says “B. Martin” for Wharton.]
Benjamin Tinlin, male, age 14, Scottish, born in Ontario.
Thomas Tinlin, male, age 8, Scottish, born in Ontario.