| Disorder | Symbol(s) | OMIM | Location |
| Mental retardation, X-linked nonspecific, type 19 (3) | RPS6KA3, RSK2, MRX19 | 300075 |
Xp22.2-p22.1 |
| Mental retardation, X-linked nonspecific, type 46, 300436 (3) | ARHGEF6, MRX46, COOL2 | 300267 |
Xq26 |
| Mental retardation, X-linked nonspecific, type 50 (2) | MRX50 | 300115 |
Xp11.3-p11.21 |
| Mental retardation, X-linked nonsyndromic (3) | FGD1, FGDY, AAS | 300546 |
Xp11.21 |
| Mental retardation, X-linked syndromic (3) | UBE2A, RAD6A | 312180 |
Xq24-q25 |
| Mental retardation, X-linked syndromic 10, 300220 (3) | HSD17B10, HADH2, ERAB, MRXS10, MRX17, MRX31, DUPXp11.22 | 300256 |
Xp11.2 |
| Mental retardation, X-linked syndromic, Christianson type, 300243 (3) | SLC9A6, NHE6 | 300231 |
Xq26.3 |
| Mental retardation, X-linked syndromic, Turner type, 300706 (3) | HUWE1, UREB1, KIAA0312, LASU1 | 300697 |
Xp11.2 |
| Mental retardation, X-linked, 1 (2) | MRX1 | 309530 |
Xp11.3-q21.1 |
| Mental retardation, X-linked, 2 (2) | MRX2 | 300428 |
Xp22.3 |
| Mental retardation, X-linked, 21/34, 300143 (3) | IL1RAPL1, IL1R8, MRX21, MRX34 | 300206 |
Xp22.1-p21.3 |
| Mental retardation, X-linked, 300495 (3) | NLGN4, KIAA1260, AUTSX2, ASPGX2 | 300427 |
Xp22.33 |
| Mental retardation, X-linked, FRAXE type, 309548 (3) | AFF2, FMR2, FRAXE, MRX2 | 300806 |
Xq28 |
| Mental retardation, X-linked, Lubs type, 300260 (3) | MECP2, RTT, PPMX, MRX16, MRX79, AUTSX3, MRXSL, MRXS13, MRX79, MRX16 | 300005 |
Xq28 |
| Mental retardation, X-linked, Shashi type (2) | MRXS11, SMRXS | 300238 |
Xq26-q27 |
| Mental retardation, X-linked, Snyder-Robinson type, 309583 (3) | SMS, SRS, MRSR | 300105 |
Xp22.1 |
| Mental retardation, X-linked, South African type (2) | MRSA | 300243 |
Xq24-q27.3 |
| Mental retardation, X-linked, ZDHHC9-related (3) | ZDHHC9, DHHC9 | 300646 |
Xq26.1 |
| Mental retardation, X-linked, syndromic 12 (2) (?) | MRXS12 | 309545 |
Xp11 |
| Mental retardation, X-linked, syndromic 13, 300055 (3) | MECP2, RTT, PPMX, MRX16, MRX79, AUTSX3, MRXSL, MRXS13, MRX79, MRX16 | 300005 |
Xq28 |