C
- Cabin Creek Estates
- Cabin John
- Cabin River Farms
- Calebs Delight
- California
- Callaway
- Calloway Landing
- Calvary
- Calvert
- Calvert Beach
- Calvert Mobile Home
- Calverton
- Calvert Towne
- Cambridge
- Cambridge Estates
- Camelot
- Cameron Tract
- Campbell
- Campbells
- Camp Calvert
- Campers Hill
- Camp Maria
- Camp Springs
- Campus Hills Estates
- Candlewick
- Cannon Farm
- Canterbury
- Canterbury
- Canton
- Cape Arthur
- Cape Hill Farms
- Cape Horn South
- Cape Loch Haven
- Cape May Beach
- Cape Saint Claire
- Capitol Estates
- Capitol Heights
- Carderock
- Cardiff
- Cardtown
- Carey Heights
- Careytown
- Carlos
- Carmae Acres
- Carmichael
- Carney
- Carole Acres
- Carolina Hills
- Carpenter Point
- Carriage Hills
- Carriage Hills
- Carriage Hills
- Carriage Hills
- Carriage Hill Village
- Carroll Heights
- Carroll Highlands
- Carroll Island
- Carroll Manor
- Carrollton
- Carrollton Manor
- Carroll Woods Estates
- Carrollyn Manor
- Carsan Knolls
- Carsins
- Carters Plains
- Carville Station
- Cashell Woods
- Casselman
- Cassidy Wharf
- Castle Haven Estates
- Catchpenny
- Cathers Corner
- Catoctin Furnace
- Catonsville
- Cattertons Reach
- Cavetown
- Cayots
- Cearfoss
- Cecilton
- Cedar Beach
- Cedarbrook
- Cedar Grove
- Cedar Hill
- Cedar Hills
- Cedarhurst
- Cedarhurst Acres
- Cedar Landing
- Cedar Lawn
- Cedarmere
- Cedar Point
- Cedar Point
- Cedartown
- Cedarville
- Cedarwood Estates
- Cedar Woods
- Centennial Homestead
- Centennial Lake
- Centennial Village
- Centerville
- Centreville
- Ceresville
- Chadwick
- Champ
- Chance
- Chaneyville
- Chantilly Manor
- Chapel Hill
- Chapel Hills
- Chapel Knoll
- Chapel Woods
- Chapel Woods
- Chaple
- Chaptico
- Charlestown
- Charlestown
- Charlotte Hall
- Charlton
- Char-Nor Manor
- Chase
- Chases Forest
- Chelsea
- Cheltenham
- Cherry Grove
- Cherry Hill
- Cherry Walk Estates
- Chesapeake Beach
- Chesapeake City
- Chesapeake Haven
- Chesapeake Heights on the Bay
- Chesapeake Mobile Court
- Chesapeake Ranch Estates
- Cheslou Village
- Chesmar
- Chesmar
- Chester
- Chestertown
- Chesterville
- Chestnut Farms
- Chestnut Grove
- Chestnut Grove
- Chestnut Hill
- Cheston
- Cheval Trails
- Cheverly
- Chevy Chase
- Chevy Chase Section
- Chevy Chase Section Five
- Chevy Chase View
- Chevy Chase Village
- Chewsville
- Chicamuxen
- Chilcutt
- Chillum
- Chinaberry Manor
- Chingville
- Chinquapin Crest
- Choptank
- Choptank Pines
- Christs Rock
- Church Creek
- Church Hill
- Churchton
- Churchville
- Claggettsville
- Claiborne
- Clara
- Clarksburg
- Clarks Landing
- Clarksville
- Clarysville
- Claysville
- Clayton
- Clear Acres
- Clear Spring
- Clear View
- Clearview North
- Cleavers Corner
- Clements
- Clemsonville
- Cleveland Park Estates
- Cliffs City
- Cliffton Estates
- Clinton
- Clopper
- Clover Hill
- Cloverly
- Cockeysville
- Coffee Hill
- Cohill Estates
- Cokeland
- Cokesbury
- Colbourne
- Cold Spring
- Colebrook
- Coleman
- Coles Corner
- Colesville
- Colgate
- College Park
- Colmar Manor
- Colonial Park
- Colonial Park
- Colora
- Coltons Point
- Columbia
- Compton
- Compton
- Comus
- Concord
- Connecticut Avenue Park
- Conners Corner
- Conococheaque
- Conowingo
- Conowingo Sta
- Conquest Beach
- Constant Branch
- Conte Manor
- Conways
- Cooksville
- Cool Hollow Estates
- Cooper
- Cooperfield
- Cooper Mill
- Coopstown
- Copeland
- Coppermine Estates
- Copperville
- Coral Hills
- Corbett
- Corbin
- Cordova
- Cornersville
- Cornfield Harbor
- Correlli Estates
- Corriganville
- Costen
- Coster
- Cottage City
- Cottage Grove
- Country Club Estates
- Country Life Acres
- Countryside
- Countryside West
- Country Squire Estates
- Country Trails
- Country View
- Courts of Harford Square
- Coventry
- Coventry Farms
- Cove View
- Cowentown
- Cox
- Cox Creek Acres
- Coxs Corner
- Craigtown
- Cranberry Station
- Cranbery
- Craney Creek Estates
- Crapo
- Creagerstown
- Crellin
- Cremona
- Cresaptown
- Crest Valley
- Crestview
- Creswell
- Crisfield
- Crocheron
- Crofton
- Cromwell Woods
- Cronhardt
- Croom
- Crosby
- Crossroads
- Crouse Mill
- Crownsville
- Crows Nest
- Crumptown
- Crystal Beach
- Cumberland
- Cypress Knolls