Listed below are the Past Winners of the Newton Shield, the Junior Newton Shield, the Newton Quaich and the Junior Newton Quaich.
Newton Shield Winners
| 1960 | Elderslie |
| 1961 | Ralston |
| 1962 | Paisley |
| 1963 | Paisley |
| 1964 | Bonnyton |
| 1965 | Paisley |
| 1966 | Ralston |
| 1967 | Old Ranfurly |
| 1968 | Paisley |
| 1969 | Bonnyton |
| 1970 | Cochrane Castle |
| 1971 | Elderslie |
| 1972 | Cochrane Castle |
| 1973 | Cochrane Castle |
| 1974 | Ranfurly Castle |
| 1975 | Greenock |
| 1976 | Cochrane Castle |
| 1977 | Cochrane Castle |
| 1978 | Cochrane Castle |
| 1979 | Cochrane Castle |
| 1980 | Ranfurly Castle |
| 1981 | Cochrane Castle |
| 1982 | Cochrane Castle |
| 1983 | Cochrane Castle |
| 1984 | Cochrane Castle |
| 1985 | Cochrane Castle |
| 1986 | Cochrane Castle |
| 1987 | Renfrew |
| 1988 | Cochrane Castle |
| 1989 | Cochrane Castle |
| 1990 | Cochrane Castle |
| 1991 | Paisley |
| 1992 | Greenock |
| 1993 | Greenock |
| 1994 | Greenock |
| 1995 | Kilmacolm |
| 1996 | Greenock |
| 1997 | Ralston |
| 1998 | Paisley |
| 1999 | Kilmacolm |
| 2000 | Greenock |
| 2001 | Paisley |
| 2002 | Renfrew |
| 2003 | Cochrane Castle |
| 2004 | Paisley |
| 2005 | Kilmacolm |
| 2006 | Kilmacolm |
| 2007 | Bonnyton |
| 2008 | Paisley |
| 2009 | Greenock |
| 2010 | Kilmacolm |
| 2011 | Paisley |
| 2012 | Ralston |
| 2013 | Elderslie |
| 2014 | Bonnyton |
| 2015 | Paisley |
| 2016 | Paisley |
| 2017 | Elderslie |
| 2018 | Erskine |
| 2019 | Elderslie |
Junior Newton Shield Winners
| 1968 | Ralston |
| 1969 | Cochrane Castle |
| 1970 | Cochrane Castle |
| 1971 | Ralston |
| 1972 | Elderslie |
| 1973 | Ralston |
| 1974 | Ralston |
| 1975 | Paisley |
| 1976 | Paisley |
| 1977 | Paisley |
| 1978 | Ralston |
| 1979 | Greenock |
| 1980 | Elderslie |
| 1981 | Ralston |
| 1982 | Old Ranfurly |
| 1983 | Cochrane Castle |
| 1984 | Cochrane Castle |
| 1985 | Greenock |
| 1986 | Elderslie |
| 1987 | Cochrane Castle |
| 1988 | Cochrane Castle |
| 1989 | Erskine |
| 1990 | Old Ranfurly |
| 1991 | Old Ranfurly |
| 1992 | Cochrane Castle |
| 1993 | Paisley |
| 1994 | Ranfurly Castle |
| 1995 | Paisley |
| 1996 | Greenock |
| 1997 | Caldwell |
| 1998 | Cochrane Castle |
| 1999 | Ralston |
| 2000 | Greenock |
| 2001 | Ralston |
| 2002 | Renfrew |
| 2003 | Renfrew |
| 2004 | Renfrew |
| 2005 | Paisley |
| 2006 | Paisley |
| 2007 | Greenock |
| 2008 | Ranfurly Castle |
| 2009 | Ranfurly Castle |
| 2010 | Ranfurly Castle |
| 2011 | Ranfurly Castle |
| 2012 | Erskine |
| 2013 | Old Ranfurly |
| 2014 | Greenock |
| 2015 | Old Ranfurly |
| 2016 | Old Ranfurly |
| 2017 | Ralston |
| 2018 | Ralston |
| 2019 | Caldwell |
Newton Quaich Winners (Runners-up to Newton Shield)
| 1992 | Kilmacolm |
| 1993 | Elderslie |
| 1994 | Kilmacolm |
| 1995 | Renfrew |
| 1996 | Ralston |
| 1997 | Kilmacolm |
| 1998 | Greenock |
| 1999 | Ranfurly Castle |
| 2000 | Renfrew |
| 2001 | Greenock |
| 2002 | Paisley |
| 2003 | Greenock |
| 2004 | Greenock |
| 2005 | Greenock |
| 2006 | Greenock |
| 2007 | Erskine |
| 2008 | Cochrane Castle |
| 2009 | Cochrane Castle |
| 2010 | Paisley |
| 2011 | Bonnyton |
| 2012 | Paisley |
| 2013 | Cochrane Castle |
| 2014 | Cochrane Castle |
| 2015 | Bonnyton |
| 2016 | Old Ranfurly |
| 2017 | Paisley |
| 2018 | Kilmacolm |
| 2019 | Erskine |
Junior Newton Quaich (Runners-up to Junior Newton Shield)
| 2009 | Ralston |
| 2010 | Renfrew |
| 2011 | Erskine |
| 2012 | Cochrane Castle |
| 2013 | Cochrane Castle |
| 2014 | Paisley |
| 2015 | Caldwell |
| 2016 | Paisley |
| 2017 | Paisley |
| 2018 | Paisley |
| 2019 | Paisley |