Beach City sits on a broad peninsula that is bordered on the east by Trinity Bay and on the west by the San Jacinto River. The southern tip of that peninsula is called Cedar Point. Beach City is on the southern and eastern sides of the peninsula and the larger city of Baytown on the western side. A large central area of the peninsula has been designated an industrial district. Beach City lies on the western shore of Trinity Bay in Chambers County, Texas, and occupies most of that shore.

Beach City residents are zoned to Barbers Hill ISD or Goose Creek Consolidated ISD depending on your geographic location.