| Approved Symbol | Approved Name | Previous Symbols | Aliases | Chromosome | Accession Numbers | RefSeq IDs |
| IL1A | interleukin 1, alpha | IL1 | IL1F1, IL-1A | 2q14 | M28983 | NM_000575 |
| IL1B | interleukin 1, beta | | IL1F2, IL-1B | 2q14 | M15330 | NM_000576 |
| IL1F5 | interleukin 1 family, member 5 (delta) | | FIL1, FIL1(DELTA), FIL1D, IL1HY1, IL1RP3, IL1L1, IL-1F5 | 2q14 | AF201830 | NM_173170 |
| IL1F6 | interleukin 1 family, member 6 (epsilon) | | FIL1, FIL1E, IL-1F6, IL1(EPSILON) | 2q12-q14.1 | AF201831 | NM_014440 |
| IL1F7 | interleukin 1 family, member 7 (zeta) | | FIL1, FIL1Z, FIL1(ZETA), IL-1H4, IL-1RP1, IL-1F7 | 2q12-q14.1 | AF201832 | NM_014439 |
| IL1F8 | interleukin 1 family, member 8 (eta) | | FIL1, IL-1H2, IL-1F8 | 2q14 | AF201833 | NM_014438 |
| IL1F9 | interleukin 1 family, member 9 | | IL-1H1, IL-1RP2, IL-1F9 | 2q12-q21 | AF200492 | NM_019618 |
| IL1F10 | interleukin 1 family, member 10 (theta) | | FKSG75, IL-1HY2, IL-1F10 | 2q13 | AY026753 | NM_173161 |
| IL1R1 | interleukin 1 receptor, type I | IL1R, IL1RA | D2S1473, CD121A | 2q12 | M27492 | |
| IL1R2 | interleukin 1 receptor, type II | IL1RB | CD121b | 2q12 | X59770 | |
| IL1RAP | interleukin 1 receptor accessory protein | | IL-1RAcP, IL1R3, C3orf13 | 3q28 | AB006537 | |
| IL1RAPL1 | interleukin 1 receptor accessory protein-like 1 | IL1RAPL, MRX34, MRX21 | OPHN4, TIGIRR-2, IL1R8 | Xp22.1-p21.3 | AJ243874 | NM_014271 |
| IL1RAPL2 | interleukin 1 receptor accessory protein-like 2 | | IL-1R9, TIGIRR-1, IL1RAPL-2, IL1R9 | Xq22 | AF181285 | |
| IL1RL1 | interleukin 1 receptor-like 1 | | ST2, FIT-1, ST2L, ST2V, DER4, T1 | 2q12 | D12764 | NM_016232 |
| IL1RL2 | interleukin 1 receptor-like 2 | | IL1R-rp2, IL1RRP2 | 2q12 | U49065 | NM_003854 |
| IL1RN | interleukin 1 receptor antagonist | | IL1RA, ICIL-1RA, IL1F3, IRAP | 2q14.2 | M55646 | NM_173841 |
| IL2 | interleukin 2 | | IL-2 | 4q26-q27 | U25676 | |
| IL2RA | interleukin 2 receptor, alpha | IL2R | CD25 | 10p15-p14 | X01057 | NM_000417 |
| IL2RB | interleukin 2 receptor, beta | | CD122 | 22q13 | M26062 | |
| IL2RG | interleukin 2 receptor, gamma (severe combined immunodeficiency) | SCIDX1, IMD4 | CD132 | Xq13 | D11086 | |
| IL3 | interleukin 3 (colony-stimulating factor, multiple) | | IL-3, MULTI-CSF, MCGF | 5q23-q31 | M14743 | NM_000588 |
| IL3RA | interleukin 3 receptor, alpha (low affinity) | | CD123 | Xp22.3 and Yp13.3 | M74782 | |
| IL4 | interleukin 4 | | BSF1, IL-4, BCGF1, BCGF-1 | 5q23-q31 | M23442 | NM_000589 |
| IL4R | interleukin 4 receptor | | CD124 | 16p12.1-p11.2 | X52425 | |
| IL5 | interleukin 5 (colony-stimulating factor, eosinophil) | | IL-5, EDF, TRF | 5q23-q31 | X04688 | NM_000879 |
| IL5RA | interleukin 5 receptor, alpha | IL5R | CDw125, CD125 | 3p26-p24 | M96652 | |
| IL6 | interleukin 6 (interferon, beta 2) | IFNB2 | IL-6, BSF2, HGF, HSF | 7p21-p15 | M18403 | |
| IL6R | interleukin 6 receptor | | CD126 | 1q21 | X12830 | |
| IL6RL1 | interleukin 6 receptor-like 1 | | | 9q22.2 | | |
| IL6ST | interleukin 6 signal transducer (gp130, oncostatin M receptor) | | GP130, CD130 | 5q11 | M57230 | |
| IL6STP | interleukin 6 signal transducer (gp130, oncostatin M receptor) pseudogene | | | 17p11 | | |
| IL7 | interleukin 7 | | IL-7 | 8q12-q13 | J04156 | |
| IL7R | interleukin 7 receptor | | CD127 | 5p13 | M29696 | |
| IL8 | interleukin 8 | | SCYB8, LUCT, LECT, MDNCF, TSG-1, CXCL8, IL-8, NAP-1, 3-10C, MONAP, AMCF-I, LYNAP, NAF, b-ENAP, GCP-1, K60 | 4q13-q21 | Y00787 | |
| IL8RA | interleukin 8 receptor, alpha | CMKAR1 | CXCR1, CKR-1, CDw128a, CD181 | 2q35 | U11870 | NM_000634 |
| IL8RB | interleukin 8 receptor, beta | | CXCR2, CMKAR2, CD182 | 2q35 | U11869 | |
| IL8RBP | interleukin 8 receptor, beta pseudogene | | | 2q35 | M98335 | |
| IL9 | interleukin 9 | | IL-9, HP40, P40 | 5q31-q35 | S63356 | NM_000590 |
| IL9R | interleukin 9 receptor | | CD129 | Xq28 and Yq12 | M84747 | NM_002186 |
| IL9RP1 | interleukin 9 receptor pseudogene 1 | | | 9q34 | | |
| IL9RP2 | interleukin 9 receptor pseudogene 2 | | | 10p15 | L39063 | |
| IL9RP3 | interleukin 9 receptor pseudogene 3 | | | 16p13.3 | L39062 | |
| IL9RP4 | interleukin 9 receptor pseudogene 4 | | | 18p11.3 | | NG_002764 |
| IL10 | interleukin 10 | | CSIF, TGIF, IL10A, IL-10 | 1q31-q32 | M57627 | NM_000572 |
| IL10RA | interleukin 10 receptor, alpha | IL10R | HIL-10R, CDW210A | 11q23 | U00672 | |
| IL10RB | interleukin 10 receptor, beta | CRFB4, D21S58, D21S66 | CRF2-4, CDW210B, IL-10R2 | 21q22.1-q22.2 | U08988 | |
| IL11 | interleukin 11 | | IL-11, AGIF | 19q13.3-q13.4 | X58377 | NM_000641 |
| IL11RA | interleukin 11 receptor, alpha | | | 9p13 | Z38102 | |
| IL11RB | interleukin 11 receptor, beta | | | reserved | | |
| IL12A | interleukin 12A (natural killer cell stimulatory factor 1, cytotoxic lymphocyte maturation factor 1, p35) | NKSF1 | CLMF, IL-12A, p35, NFSK | 3p12-q13.2 | M65271 | NM_000882 |
| IL12B | interleukin 12B (natural killer cell stimulatory factor 2, cytotoxic lymphocyte maturation factor 2, p40) | NKSF2 | CLMF, IL-12B, NKSF, CLMF2 | 5q31.1-q33.1 | M65290 | NM_002187 |
| IL12RB1 | interleukin 12 receptor, beta 1 | IL12RB | CD212 | 19p13.1 | U03187 | |
| IL12RB2 | interleukin 12 receptor, beta 2 | | | 1p31.3-p31.2 | U64198 | NM_001559 |
| IL13 | interleukin 13 | | P600, IL-13, ALRH, BHR1 | 5q31 | U31120 | NM_002188 |
| IL13RA1 | interleukin 13 receptor, alpha 1 | | IL-13Ra, NR4, CD213a1 | Xq24 | U62858 | NM_001560 |
| IL13RA2 | interleukin 13 receptor, alpha 2 | | IL-13R, IL13BP, CD213a2 | Xq13.1-q28 | X95302 | NM_000640 |
| IL15 | interleukin 15 | | IL-15 | 4q31 | U14407 | |
| IL15RA | interleukin 15 receptor, alpha | | | 10p15.1 | U31628 | NM_172200, NM_002189 |
| IL15RB | interleukin 15 receptor, beta | | | reserved | | |
| IL16 | interleukin 16 (lymphocyte chemoattractant factor) | | LCF, IL-16, prIL-16, HsT19289 | 15q26.3 | U82972 | NM_172217 |
| IL17A | interleukin 17A | CTLA8, IL17 | IL-17A, IL-17 | 6p12 | U32659 | NM_002190 |
| IL17B | interleukin 17B | | IL-17B, ZCYTO7, IL-20 | 5q33.1 | AF184969 | |
| IL17C | interleukin 17C | | IL-17C, CX2, IL-21 | 16q24 | AF152099 | NM_013278 |
| IL17D | interleukin 17D | | IL-22, IL-27, IL-17D, IL27, FLJ30846 | 13q11 | AY078238 | NM_138284 |
| IL17F | interleukin 17F | | IL-17F, ML-1, ML1 | 6p12 | AF384857 | |
| IL17RA | interleukin 17 receptor A | IL17R | hIL-17R, IL-17RA, CDw217, CD217 | 22q11.1 | U58917 | NM_014339 |
| IL17RB | interleukin 17 receptor B | IL17BR | IL17RH1, EVI27, CRL4 | 3p21.1 | AF212365 | NM_172234 |
| IL17RC | interleukin 17 receptor C | | IL17-RL | 3p25.3 | BC006411 | NM_032732 |
| IL17RD | interleukin 17 receptor D | | SEF, IL17RLM, FLJ35755, IL-17RD | 3p21.1 | AF494208 | NM_017563 |
| IL17RE | interleukin 17 receptor E | | FLJ23658 | 3p25.3 | AF458069 | NM_153480 |
| IL18 | interleukin 18 (interferon-gamma-inducing factor) | | IGIF, IL1F4, IL-1g, IL-18 | 11q22.2-q22.3 | U90434 | NM_001562 |
| IL18BP | interleukin 18 binding protein | | IL18BPa | 11q13 | AF110798 | NM_173042 |
| IL18R1 | interleukin 18 receptor 1 | | IL1RRP, IL-1Rrp, CD218a | 2q12 | U43672 | NM_003855 |
| IL18RAP | interleukin 18 receptor accessory protein | | AcPL, CD218b | 2p24.3-p24.1 | AF077346 | NM_003853 |
| IL19 | interleukin 19 | | IL-19, MDA1, ZMDA1, IL-10C, NG.1 | 1q32.2 | AF192498 | NM_153758 |
| IL20 | interleukin 20 | | ZCYTO10, IL10D, IL-20 | 1q32 | AF224266 | NM_018724 |
| IL20RA | interleukin 20 receptor, alpha | | ZCYTOR7, IL-20R1 | 6q23.3 | AF184971 | NM_014432 |
| IL20RB | interleukin 20 receptor beta | FNDC6 | DIRS1, IL-20R2, MGC34923 | 3q22.3 | BC033292 | NM_144717 |
| IL21 | interleukin 21 | | Za11, IL-21 | 4q26-q27 | AF254069 | |
| IL21R | interleukin 21 receptor | | | 16p11 | AF254067 | |
| IL22 | interleukin 22 | | ILTIF, IL-21, zcyto18, IL-TIF, IL-D110, TIFa, TIFIL-23, IL-22 | 12q15 | AF279437 | NM_020525 |
| IL22RA1 | interleukin 22 receptor, alpha 1 | IL22R | CRF2-9 | 1p36.11 | AF286095 | |
| IL22RA2 | interleukin 22 receptor, alpha 2 | | CRF2-S1, IL-22BP | 6q24.1-q24.2 | AY044429 | |
| IL23A | interleukin 23, alpha subunit p19 | | SGRF, IL23P19, IL-23, IL-23A | 12q13.13 | AB030000 | |
| IL24 | interleukin 24 | ST16 | mda-7, IL10B, Mob-5, C49A, FISP, IL-24 | 1q32 | U16261 | NM_006850 |
| IL25 | interleukin 25 | IL17E | IL-25, IL-17E | 14q11.2 | AF305200 | |
| IL26 | interleukin 26 | | AK155, IL-26 | 12q15 | AJ251549 | NM_018402 |
| IL27 | interleukin 27 | IL30 | IL-27, p28 | 16p11 | AY099296 | |
| IL27RA | interleukin 27 receptor, alpha | | WSX-1, TCCR, CRL1, WSX1, zcytor1, IL-27R | 19p13.11 | AF053004 | NM_004843 |
| IL28A | interleukin 28A (interferon, lambda 2) | | IL-28A, IFNL2 | 19q13.13 | AY129148 | |
| IL28B | interleukin 28B (interferon, lambda 3) | | IL-28B, IFNL3 | 19q13.13 | AY129149 | |
| IL28RA | interleukin 28 receptor, alpha (interferon, lambda receptor) | | CRF2/12, IFNLR, IL-28R1 | 1p36.11 | AY129153 | NM_170743 |
| IL29 | interleukin 29 (interferon, lambda 1) | | IL-29, IFNL1 | 19q13.13 | AY129150 | |
| IL31 | interleukin 31 | | IL-31 | 12q24.31 | AY499343 | |
| IL31RA | interleukin 31 receptor A | | CRL3, GLM-R, CRL, Glmr, IL-31RA | 5q11.2 | AY499339 | NM_139017 |
| IL32 | interleukin 32 | | NK4, TAIF, TAIFb, TAIFd | 16p13.3 | M59807 | NM_004221 |
| IL34 | interleukin 34 | C16orf77 | MGC34647, IL-34 | 16q22.1 | BC029804 | NM_152456 |