Imperial Logo 1 
1920's - 1934
 Imperial Logo 3
1935 - 1948
 
 Imperial Logo 2
1949 - 1962
 Esso 1
1963 - Date

Note: 1925 was the first year that a road map was produced by Imperial.  Only regional maps were produced up until 1946.  Rolph-Clark-Stone produced their maps from at least 1929 to 1933 and included an Ontario (plus Eastern, Prairie, and Western Canada) maps.  1930 and 1931 saw production of "Ontario and Adjacent States" maps.  In 1932 there were six "Sectional Maps" produced. General Drafting started the Canadian maps in 1933 with an Eastern Canada only (which included Ontario).  From 1933 to 1938 they covered Canada with just Eastern and Western maps.  In 1939 they added Central Canada for a 3 title set, until 1941.  Imperial Esso maps were not published from 1942 to 1945.  In 1946 the first Ontario map was produced in a set which at first included one map of all of Canada, then one of Newfoundland, and finally settled to the "standard" 5 province titles until General Drafting stopped in 1975. (Source Stan DeOrsey & Peter Ledwith - RMCA)
Maps with years in red are not in my collection - scans of covers have been provided by other collectors.
 Imperial001 circa 1924 Icon
Circa 1924
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1925
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1929
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1930
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1931
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1932 - No.2 
1932 3 Cover Icon
1932 - No.3 
33 Esso Cover Icon 
1933 
1934 Cover Icon
1934
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1935
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1936
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1937 
 
38 Esso Cover Icon
1938
 
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1939 
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Circa 1939
Muskoka  
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1940
 
1940 Muskoka Lakes Cover Icon
1940
Muskoka
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1941
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1946
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1947
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1948
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1949
49 Cover Icon
1949
Muskoka
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1950
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1951
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1952
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1953
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1954
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1955
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1956
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1957
 
 
 
 
 
 
 
 
 
1957
Cities
 
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1958
1958 Hamilton Toronto Ottawa Cover Icon
1958
Cities 
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1959
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1959
Cities
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1960
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1961
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1962
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1962
Highway 401
62 Toronto Cover Icon
1962
Toronto
1962 Hamilton Cover Icon
1962
Hamilton
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1963
1963 Hamilton Cover Icon
1963
Hamilton
1963 cental Ontario Cover Icon
1963
Holidays
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1964
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1964
Holidays
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1965
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1965
Holidays
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1966
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1967
1967 Ottawa Cover Icon
1967
Ottawa
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1968
68 Toronto Cover Icon
1968
Toronto
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1969
 
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1970
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1971
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1972
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1973
Esso Cover Icon 74
1974
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1974
Toronto
75 Esso Cover Icon
1975
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1977  
Esso Cover Icon 78
1978
Esso Cover Icon 79
1979
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1981 
 
 
 
 
 
 

Esso 1960s Toronto