This paper examines how ethnicity related to cultural differences arising from ethnic background affects housing market transactions in the Atlanta metro area. Using both the US Census and Wikipedia approaches to infer ethnicity from individuals' names, we find that the interplay of buyer, seller, and agent ethnicity composition affects interaction in the housing market. Sellers working with listing agents in the same ethnic group set higher listing prices and enjoy higher selling prices and quicker sales. Agents working with same ethnicity buyers yield higher prices and liquidity. Even though sellers only communicate with buyers through their agents, houses sold by sellers to buyers of same ethnicity have higher prices and sell faster. And while the ethnic mix of agents and their clients matter, the ethnic mix of agents in the transaction does not.