- Cactus
- Cactus
- Caddo Mills
- Caldwell
- Callisburg
- Calvert
- Cameron
- Cameron Park
- Cameron Park Colonia
- Camp Swift
- Camp Wood
- Campbell
- Canadian
- Caney City
- Canton
- Cantu Addition
- Canutillo
- Canyon
- Canyon Lake
- Carbon
- Carls Corner
- Carlsbad
- Carmine
- Carrizo Hill
- Carrizo Springs
- Carrollton
- Carthage
- Casa Blanca
- Cashion Community
- Castle Hills
- Castroville
- Catarina
- Cedar Hill
- Cedar Park
- Celeste
- Celina
- Center
- Center
- Centerville
- Central Gardens
- César Chávez
- Chandler
- Channelview
- Channing
- Charlotte
- Chester
- Chico
- Childress
- Chillicothe
- Chilton
- China
- China Grove
- Chireno
- Christine
- Christoval
- Chula Vista Colonia
- Chula Vista Colonia
- Cibolo
- Cienegas Terrace
- Cinco Ranch
- Circle D-KC Estates
- Cisco
- Citrus City
- Clarendon
- Clarksville
- Clarksville City
- Claude
- Clear Lake Shores
- Cleburne
- Cleveland
- Clifton
- Clint
- Cloverleaf
- Clute
- Clyde
- Coahoma
- Cockrell Hill
- Coffee City
- Coldspring
- Coleman
- College Station
- Colleyville
- Collinsville
- Colmesneil
- Colonia Iglesia Antigua
- Colorado City
- Columbus
- Comanche
- Combes
- Combine
- Comfort
- Commerce
- Como
- Concepcion
- Conroe
- Converse
- Cool
- Coolidge
- Cooper
- Cooper
- Coppell
- Copper Canyon
- Copperas Cove
- Corinth
- Corpus Christi
- Corral City
- Corrigan
- Corsicana
- Cottonwood
- Cottonwood Shores
- Cotulla
- Coupland
- Cove
- Covington
- Coyanosa
- Coyote Acres
- Coyote Acres Colonia
- Crandall
- Crane
- Cranfills Gap
- Crawford
- Creedmoor
- Cresson
- Crockett
- Crosby
- Crosbyton
- Cross Mountain
- Cross Plains
- Cross Roads
- Cross Roads
- Cross Timber
- Crowell
- Crowley
- Crystal City
- Cuero
- Cuevitas
- Cumby
- Cumings
- Cuney
- Cushing
- Cut and Shoot
- Cypress
