Halcombe George Brock (3 April 1919 – 2 August 1941) was an Australian rules football ruckman who played 24 senior games with Port Adelaide Football Club in the South Australian National Football League (SANFL), and 4 senior games with the North Melbourne in the Victorian Football League (VFL). He died as the result of an air collision during a RAAF training exercise on Saturday, 2 August 1941.