| Collectivist anarchism | Collectivity of Saint Martin | Colleen Clinkenbeard |
| College | College and university rankings | College City, Arkansas |
| College Corner, Ohio | College football | College of Chemical Sciences |
| College of Engineering and Technology, Bhubaneswar | College of Medicine at Urbana-Champaign | College of Science – University of Baghdad |
| College Park, Georgia | College Park, Maryland | College Place, Washington |
| College Springs, Iowa | College Station, Texas | Collegedale, Tennessee |
| Collegii Ambrosiani | Collegium Artium | Collembola |
| Colles' fracture | Colletto Fava | Colleyville, Texas |
| Collider | Collier County, Florida | Collier Trophy |
| Collierville, Tennessee | Colligative properties | Collin Benjamin |
| Collin Samuel | Colline-Beaumont | Collines-du-Basque, Quebec |
| Collins English Dictionary | Collins John | Collins Mbesuma |
| Collins, Georgia | Collins, Iowa | Collins, Mississippi |
| Collins, Missouri | Collins, New York | Collinson |
| Collinsonia | Collinsonia anisata | Collinsonia australis |
| Collinsonia canadensis | Collinsonia elsholtzioides | Collinsonia glandulosa |
| Collinsonia japonica | Collinsonia macrobracteata | Collinsonia punctata |
| Collinsonia serotina | Collinsonia sinensis | Collinsonia szechuanensis |
| Collinsonia verticillata | Collinsville, Connecticut | Collinsville, Illinois |
| Collinsville, Oklahoma | Collinsville, Texas | Collinwood, Tennessee |
| Collision | Collision Course | Collision course |
| Collision domain | Collision theory | Collo |
| Collocalia esculenta | Collodion | Colloid |
| Colloidal crystal | Colloidion bag | Collongues, Alpes-Maritimes |
| Colloquialism | Collyer, Kansas | Colm Feore |
| Colm Meaney | Colman, South Dakota | Colmar Manor, Maryland |
| Colmenar de Oreja | Colmenar del Arroyo | Colmenar Viejo |
| Colmesneil, Texas | Colo, Iowa | Colobanthus |
| Colobanthus acicularis | Colobanthus affinis | Colobanthus apetalus |
| Colobanthus bolivianus | Colobanthus buchananii | Colobanthus caespitosus |
| Colobanthus kerguelensis | Colobanthus monticola | Colobanthus muscoides |
| Colobanthus pulvinatus | Colobanthus quitensis | Colobinae |
| Colobini | Colobomycter | Colobus |
| Colobus angolensis | Colobus guereza | Colobus polykomos |
| Colobus satanas | Colobus vellerosus | Colocasia esculenta |
| Colocation centre | Colofac | Cologne |
| Cologne Bonn Airport | Cologne Cathedral | Cologne Central Mosque |
| Cologne, Minnesota | Coloma Charter Township, Michigan | Coloma, Michigan |
| Coloma, Wisconsin | Colomars | Colomán Trabado |
| Colombia | Colombian armed conflict (1964–present) | Colombian Constitution of 1991 |
| Colombian peso | Colombian Weasel | Colombian weasel |
| Colombier, Quebec | Colombo | Colome, South Dakota |
| Colon (anatomy) | Colon (punctuation) | Colon Township, Michigan |
| Colon, Michigan | Colon, Nebraska | Colona, Illinois |
| Colonel | Colonial Beach, Virginia | Colonial Heights, Virginia |
| Colonialism | Colonie (village), New York | Colonie, New York |
| Colonoscopy | Colony | Colony (biology) |
| Colony counter | Colony, Kansas | Colony, Oklahoma |
| Colony-stimulating factor | Color | Color balance |
| Color blindness | Color charge | Color constancy |
| Color depth | Color Graphics Adapter | Color management |
| Color model | Color photography | Color solid |
| Color space | Color symbolism | Color temperature |
| Color term | Color theory | Color TV Game |
| Color TV-Game | Color vision | Color wheel |
| Colorado | Colorado City, Arizona | Colorado City, Texas |
| Colorado Plateau | Colorado School of Mines | Colorectal polyp |
| Colored dissolved organic matter | Colored gold | Colorfulness |
| Colorimeter (chemistry) | Colorimetry | Coloring algorithm |
| Colorpoint Shorthair | Colossal squid | Colosseum |
| Colostomy | Colostrum | Colour Index International |
| Colour revolution | Colourant | Colp, Illinois |
| Colquitt, Georgia | Colrain, Massachusetts | Colroy-la-Roche |
| Colstrip, Montana | Colt Mk 12 cannon | Colt, Arkansas |
| Coltan | Colton, New York | Colton, South Dakota |
| Colton, Washington | Coluber | Coluber andreanus |
| Coluber brevis | Coluber constrictor | Coluber elegantissimus |
| Coluber florulentus | Coluber gracilis | Coluber insulanus |
| Coluber nummifer | Coluber rubriceps | Coluber sinai |
| Coluber smithi | Coluber socotrae | Coluber somalicus |
| Coluber thomasi | Coluber variabilis | Coluber ventromaculatus |
| Coluber vittacaudatus | Coluber zebrinus | Colubridae |
| Colubrina | Colubrinae | Colubroidea |
| Columba | Columba arquatrix | Columba livia |
| Columba livia domestica | Columba oenas | Columba palumbus |
| Columbia (supercomputer) | Columbia City, Indiana | Columbia City, Oregon |
| Columbia County, Florida | Columbia Falls, Maine | Columbia Falls, Montana |
| Columbia Pictures | Columbia Records | Columbia Sportswear |
| Columbia Township, Jackson County, Michigan | Columbia Township, Tuscola County, Michigan | Columbia Township, Van Buren County, Michigan |
| Columbia University | Columbia, Connecticut | Columbia, Illinois |
| Columbia, Kentucky | Columbia, Louisiana | Columbia, Maine |
| Columbia, Maryland | Columbia, Mississippi | Columbia, New Hampshire |
| Columbia, New York | Columbia, South Carolina | Columbia, South Dakota |
| Columbia, Tennessee | Columbia, Virginia | Columbian Exchange |
| Columbiana, Ohio | Columbiaville, Michigan | Columbidae |
| Columbiformes | Columbine Valley, Colorado | Columbite |
| Columbus (town), Wisconsin | Columbus City, Iowa | Columbus day |
| Columbus Junction, Iowa | Columbus Short | Columbus Township, Luce County, Michigan |
| Columbus Township, St. Clair County, Michigan | Columbus, Georgia | Columbus, Illinois |
| Columbus, Indiana | Columbus, Kansas | Columbus, Kentucky |
| Columbus, Minnesota | Columbus, Mississippi | Columbus, Montana |
| Columbus, New Mexico | Columbus, New York | Columbus, North Dakota |
| Columbus, Ohio | Columbus, Texas | Columbus, Wisconsin |
| Column | Column (database) | Columns |
| Columns (video game) | Colutea | Colutea abyssinica |
| Colutea acutifolia | Colutea aeschinomenoides | Colutea afghanica |
| Colutea arborescens | Colutea armata | Colutea armena |
| Colutea atabaevii | Colutea atlantica | Colutea aurantiaca |
| Colutea brachyptera | Colutea buhsei | Colutea cilicica |
| Colutea delavayi | Colutea fistulosa | Colutea frigida |
