In "The Sims" series, the most members in a household you can have is 8.

The statement is true because in all versions of The Sims series, including The Sims, The Sims 2, The Sims 3, and The Sims 4, the maximum number of members allowed in a household is 8. This limitation is likely due to gameplay and performance considerations, as managing a larger household could potentially be overwhelming for players and could strain the game's performance. Therefore, the developers have set this limit to ensure a balanced and optimal gameplay experience for players.