| Number of Milk Cattle, Western Australia, '000 | ||||||||||||||
| Year | 1950 | 1951 | 1952 | 1953 | 1954 | 1955 | 1956 | 1957 | 1958 | 1959 | 1960 | 1961 | 1962 | 1963 |
| Number | 227 | 223 | 230 | 234 | 230 | 228 | 224 | 224 | 226 | 215 | 217 | 224 | 236 | 240 |
| Year | 1964 | 1965 | 1966 | 1967 | 1968 | 1969 | 1970 | 1971 | 1972 | 1973 | 1974 | 1975 | 1976 | 1977 |
| Number | 227 | 218 | 208 | 197 | 191 | 182 | 181 | 178 | 174 | 178 | 177 | 168 | 166 | 152 |
| Year | 1978 | 1979 | 1980 | 1981 | 1982 | 1983 | 1984 | 1985 | 1986 | 1987 | 1988 | 1989 | 1990 | 1991 |
| Number | 134 | 128 | 128 | 127 | 124 | 122 | 124 | 122 | 122 | 115 | 115 | 111 | 110 | 109 |
| Year | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 |
| Number | 113 | 116 | 123 | 126 | 121 | 128 | 124 | 114 | 106 | 126 | 124 | 130 | 133 | 116 |
| Year | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 1019 |
| Number | 123 | 92 | 103 | 98 | 113 | 113 | 111 | 126 | 136 | 125 | 125 | 135 | 135 | 111 |
| Year | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | 2027 | 2028 | 2029 | 2030 | 2031 | 2032 | 2033 |
| Number | 109 | 109 | 88 | 89 | 49 | na | na | na | na | na | na | na | na | na |
| Source: | ABS, | |||||||||||||
| 2024 The Australian Dairy Industrry, In Focus 2024, milking cows only | ||||||||||||||