| Grimes County Texas Cities/Towns - Anderson (County Seat), Navasota |
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![]() Your Ad Here Grimes County is a county located in the U.S. state of Texas. The 2006 Census estimate placed the county's population at 25,552. The seat of the county is Anderson. History Grimes is named for Jesse Grimes, a signer of the Texas Declaration of Independence and early settler of the county. ![]() |