The club was formed in 1977 and joined the National Soccer League in the 1978 season.
Newcastle KB United's first National Soccer League match was against Eastern Suburbs and they met their 20th and last different opponent, Brunswick Juventus, for the first time in the 1984 National Soccer League season.
The teams that Newcastle KB United played the most in league competition was Marconi Fairfield and Sydney City, who they first met in the 1978 National Soccer League season; the 11 defeats from 13 meetings against Sydney City was more than they have lost against any other club.
Adelaide City drew 7 league encounters with Newcastle KB United, more than any other club.
Newcastle KB United had recorded more league victories against Canberra City than against any other club, having beaten them 7 times out of 12 attempts.