The harris county jail has been around for over 100 years. Like you did something wrong! Harris County Tx - The 1200 Jail - Inmate Locator - Houston Tx For a full list of visitation rules, check the harris county jail 701 website. Harris county jail phone number downtown . Also, be warned that some phone providers are collecting voice prints for a database which law enforcement agencies are building. This original harris county jail was in use for over 100 years. A representative from the houston help line can also provide the amount the prisoner owes. Please listen to the prompts carefully so that you can correctly connect to your inmate. Harris county jail offender locator: Inmate mail procedures all prisoner mail should contain the sender’s complete name and complete return address, the detainee’s full name (the name he/she is set up for jail under), the detainee’s spn, the prisoner’s lodging office, and cell block area. See reviews, photos, directions, phone n...