 | Brown Suites Seoul Hotel | Residence | 120 | Gangbuk |
| Brown Tourism Hotel Seoul | 2.0 star rating | 50 | Seoul City |
| Califonia Tourist Hotel Seoul | 2.0 star rating | | Songpa Gu |
| California Tourist Hotel Seoul | 3.0 star rating | 263 | Gangnam |
 | Capetown Hotel Seoul | 2.0 star rating | 42 | Gangnam |
| Cara Motel Hotel Seoul | 1 Star | 34 | Seoul City |
 | Casa Hotel Seoul | 2.0 star rating | 40 | Gangnam |
| Cats Hotel (Jongno) Seoul | 1 Star | 51 | Seoul City |
 | Cebien Hotel Guro Seoul | 1 Star | 48 | Gangnam |
 | Cello Hotel Seocho Seoul | 2.0 star rating | 55 | Seoul City |
 | CenterMark Hotel Seoul | 4.0 star rating | 250 | Seoul City |
 | Central Tourist Hotel Seoul | 3.0 star rating | 72 | Seoul City |
 | CF Hotel Seoul | 2.0 star rating | 51 | Gangnam |
| Chungmuro Residence & Hotel Seoul | 3.0 star rating | 66 | Seoul City |
 | Citadines Han River Seoul Hotel | Residence | 149 | Seoul City |
| City Palace Tourist Hotel Seoul | 3.0 star rating | 60 | Gangbuk |
 | City Park Hotel Jongno Seoul | 2.0 star rating | 8 | Seoul City |
 | City Park Jongno Hotel Seoul | 3.0 star rating | | Seoul City |
| Click Hotel Seoul | 2.0 star rating | 75 | Seoul City |
 | Cloud 9 Residence Hotel Seoul | Residence | 72 | Gangnam |
 | Coatel Chereville Hotel Seoul | Residence | 125 | Gangnam |
 | Conrad Seoul Hotel | 5.0 star rating | 434 | Seoul City |
 | Coop City Hotel BMK Seoul | 3.0 star rating | 179 | Guro-Gu |
| CO'OP City Hotel Stayco Seoul | 3.0 star rating | | Guro-Gu |
| Coop Residence Hoegi(Dongdaemun) Hotel Seoul | 3.0 star rating | | Seoul City |
 | Courtyard by Marriott Seoul Pangyo Hotel | 5.0 star rating | 250 | Seongnam |
 | Courtyard by Marriott Times Square Hotel Seoul | 4.0 star rating | 283 | Gangnam |
| Courtyard Seoul Namdaemun Hotel | 4.0 star rating | | Gangbuk |
 | Cozy Myoung-Dong Hotel Seoul | 3.0 star rating | 70 | Gangbuk |
 | Creto Hotel Myeongdong Seoul | 3.0 star rating | 35 | Seoul City |
| Creto Hotel Myeongdong Seoul | 3.0 star rating | | Gangbuk |
 | Crown Insadong Hotel Seoul | 3.0 star rating | 78 | Seoul City |
| Crown Park Hotel Myeongdong Seoul | 4.0 star rating | 204 | Seoul City |
 | Cullinan Hotel Seoul | 3.0 star rating | 50 | Gangbuk |
 | Cutee Hotel Coex Seoul | 3.0 star rating | 55 | Gangnam |
| Daelim Residence Hotel Seoul | Residence | 24 | Gangnam |
| Dangsan INT Residence Hotel Seoul | 2.0 star rating | 60 | Gangnam |
 | David Hotel Seoul | 2.0 star rating | 40 | Gangnam |
 | Days Hotel Myeongdong Seoul | 3.0 star rating | 64 | Gangbuk |
 | D Hotel Shinchon Seoul | 1 Star And A Half | 30 | Gangbuk |
| D.H Renaissance Hotel Seoul | 3.0 star rating | 45 | Seoul City |
| DoDo Tourist Hotel Seoul | 3.0 star rating | 55 | Seoul City |
 | Dongdaemun Hotel Seoul | 2.0 star rating | 52 | Gangbuk |
 | Dongdaemun Hostel Hotel Seoul | 1 Star | 21 | Gangbuk |
| Dongdaemun House Hotel Seoul | 1 Star | 13 | Gangbuk |
| Dongdaemun Inn Guest House Hotel Seoul | Pending Category | 13 | Seoul City |
| Donggyeong Hotel Seoul | 2.0 star rating | | Seoul City |
 | Dormy Inn PREMIUM SEOUL Garosugil Hotel Seoul | 4.0 star rating | 212 | Seoul City |
 | DORMY INN SEOUL GANGNAM Hotel Seoul | 3.0 star rating | 140 | Seoul City |
 | D Seven Suites Hotel Seoul | 3.0 star rating | | Seoul City |