| NO | Astronaut | Year | Group | NO | Astronaut | Year | Group | NO | Astronaut | Year | Group |
| 1 | Acaba, Joseph M. | 2004 | 19 | 126 | Glenn, John H., Jr. | 1959 | 1 | 251 | O’Leary, Brian T. | 1967 | 6 |
| 2 | Adamson, James C. | 1984 | 10 | 127 | Glover, Victor J. | 2013 | 21 | 252 | Olivas, John D. | 1998 | 17 |
| 3 | Akers, Thomas D. | 1987 | 12 | 128 | Godwin, Linda M. | 1985 | 11 | 253 | Onishi, Tayuka | 2009 | 20 |
| 4 | Aldrin, Buzz | 1963 | 3 | 129 | Good, Michael T. | 2000 | 18 | 254 | Onizuka, Ellison S. | 1978 | 8 |
| 5 | Allen, Andrew M. | 1987 | 12 | 130 | Gordon, Richard F., Jr. | 1963 | 3 | 255 | Oswald, Stephen S. | 1985 | 11 |
| 6 | Allen, Joseph P. | 1967 | 6 | 131 | Gorie, Dominic L. | 1995 | 15 | 256 | Overmyer, Robert F. | 1969 | 7 |
| 7 | Altman, Scott D. | 1995 | 15 | 132 | Grabe, Ronald J. | 1980 | 9 | 257 | Parazynski, Scott E. | 1992 | 14 |
| 8 | Anders, William A. | 1963 | 3 | 133 | Graveline, Duane E. | 1965 | 4 | 258 | Parker, Robert A. R. | 1967 | 6 |
| 9 | Anderson, Clayton C. | 1998 | 17 | 134 | Gregory, Frederick D. | 1978 | 8 | 259 | Patrick, Nicholas J. M. | 1998 | 17 |
| 10 | Anderson, Michael P. | 1995 | 15 | 135 | Gregory, William G. | 1990 | 13 | 260 | Peterson, Donald H. | 1969 | 7 |
| 11 | Antonelli, Dominic A. | 2000 | 18 | 136 | Griggs, S. David | 1978 | 8 | 261 | Pettit, Donald R. | 1996 | 16 |
| 12 | Apt, Jerome | 1985 | 11 | 137 | Grissom, Virgil I. | 1959 | 1 | 262 | Phillips, John L. | 1996 | 16 |
| 13 | Archambault, Lee J. | 1998 | 17 | 138 | Grunsfeld, John M. | 1992 | 14 | 263 | Pogue, William R. | 1966 | 5 |
| 14 | Armstrong, Neil A. | 1962 | 2 | 139 | Gutierrez, Sidney M. | 1984 | 10 | 264 | Poindexter, Alan G. | 1998 | 17 |
| 15 | Arnold, Richard R., II | 2004 | 19 | 140 | Hague, Tyler N. “Nick” | 2013 | 21 | 265 | Polansky, Mark L. | 1996 | 16 |
| 16 | Ashby, Jeffrey S. | 1995 | 15 | 141 | Haise, Fred W., Jr. | 1966 | 5 | 266 | Precourt, Charles J., Jr. | 1990 | 13 |
| 17 | Aunon-Chancellor, Serena M. | 2009 | 20 | 142 | Halsell, James D., Jr. | 1990 | 13 | 267 | Readdy, William F. | 1987 | 12 |
| 18 | Bagian, James P. | 1980 | 9 | 143 | Ham, Kenneth T. | 1998 | 17 | 268 | Reightler, Kenneth S., Jr. | 1987 | 12 |
| 19 | Baker, Ellen S. | 1984 | 10 | 144 | Hammond, L. Blaine, Jr. | 1984 | 10 | 269 | Reilly, James F. | 1995 | 15 |
| 20 | Baker, Michael A. | 1985 | 11 | 145 | Hansen, Jeremy | 2009 | 20 | 270 | Reisman, Garrett E. | 1998 | 17 |
| 21 | Barratt, Michael R. | 2000 | 18 | 146 | Harbaugh, Gregory J. | 1987 | 12 | 271 | Resnik, Judith A. | 1978 | 8 |
| 22 | Barron, Kayla | 2017 | 22 | 147 | Harris, Bernard A., Jr. | 1990 | 13 | 272 | Richards, Paul W. | 1996 | 16 |
| 23 | Barry, Daniel T. | 1992 | 14 | 148 | Hart, Terry J. | 1978 | 8 | 273 | Richards, Richard N. | 1980 | 9 |
| 24 | Bassett, Charles A., II | 1963 | 3 | 149 | Hartsfield, Henry W., Jr. | 1969 | 7 | 274 | Ride, Sally K. | 1978 | 8 |
| 25 | Bean, Alan L. | 1963 | 3 | 150 | Hauck, Frederick H. | 1978 | 8 | 275 | Robertson, Patricia Hilliard | 1998 | 17 |
| 26 | Behnken, Robert L. | 2000 | 18 | 151 | Hawley, Steven A. | 1978 | 8 | 276 | Robinson, Stephen K. | 1995 | 15 |
| 27 | Blaha, John E. | 1980 | 9 | 152 | Helms, Susan J. | 1990 | 13 | 277 | Rominger, Kent V. | 1992 | 14 |
| 28 | Bloomfield, Michael J. | 1995 | 15 | 153 | Henize, Karl G. | 1967 | 6 | 278 | Roosa, Stuart A. | 1966 | 5 |
| 29 | Bluford, Guion S., Jr. | 1978 | 8 | 154 | Henricks, Terence T. | 1985 | 11 | 279 | Ross, Jerry L. | 1980 | 9 |
| 30 | Bobko, Karol J. | 1969 | 7 | 155 | Hernandez, Jose M. | 2004 | 19 | 280 | Rubins, Kathleen | 2009 | 20 |
| 31 | Boe, Eric A. | 2000 | 18 | 156 | Herrington, John B. | 1996 | 16 | 281 | Rubio, Francisco | 2017 | 22 |
| 32 | Bolden, Charles F., Jr. | 1980 | 9 | 157 | Hieb, Richard J. | 1985 | 11 | 282 | Runco, Mario, Jr. | 1987 | 12 |
| 33 | Borman, Frank | 1962 | 2 | 158 | Higginbotham, Joan E. | 1996 | 16 | 283 | Saint-Jacques, David | 2009 | 20 |
| 34 | Bowen, Stephen G. | 2000 | 18 | 159 | Hilmers, David C. | 1980 | 9 | 284 | Satcher, Robert L. | 2004 | 19 |
| 35 | Bowersox, Kenneth D. | 1987 | 12 | 160 | Hines, Bob | 2017 | 22 | 285 | Schirra, Walter M., Jr. | 1959 | 1 |
| 36 | Brady, Charles E., Jr. | 1992 | 14 | 161 | Hire, Kathryn P. | 1995 | 15 | 286 | Schmitt, Harrison H. | 1965 | 4 |
| 37 | Brand, Vance D. | 1966 | 5 | 162 | Hobaugh, Charles O. | 1996 | 16 | 287 | Schweickart, Russell L. | 1963 | 3 |
| 38 | Brandenstein, Daniel C. | 1978 | 8 | 163 | Hoburg, Warren | 2017 | 22 | 288 | Scobee, Francis R. | 1978 | 8 |
| 39 | Bresnik, Randolph J. | 2004 | 19 | 164 | Hoffman, Jeffrey A. | 1978 | 8 | 289 | Scott, David R. | 1963 | 3 |
| 40 | Bridges, Roy D., Jr. | 1980 | 9 | 165 | Holmquest, Donald L. | 1967 | 6 | 290 | Scott, Winston E. | 1992 | 14 |
| 41 | Brown, Curtis L., Jr. | 1987 | 12 | 166 | Hopkins, Michael S. | 2009 | 20 | 291 | Searfoss, Richard A. | 1990 | 13 |
| 42 | Brown, David M. | 1996 | 16 | 167 | Horowitz, Scott J. | 1992 | 14 | 292 | Seddon, Margaret Rhea | 1978 | 8 |
| 43 | Brown, Mark N. | 1984 | 10 | 168 | Hurley, Douglas G. | 2000 | 18 | 293 | See, Elliot M., Jr. | 1962 | 2 |
| 44 | Buchli, James F. | 1978 | 8 | 169 | Husband, Rick D. | 1995 | 15 | 294 | Sega, Ronald M. | 1990 | 13 |
| 45 | Bull, John S. | 1966 | 5 | 170 | Irwin, James B. | 1966 | 5 | 295 | Sellers, Piers J. | 1996 | 16 |
| 46 | Burbank, Daniel C. | 1996 | 16 | 171 | Ivins, Marsha S. | 1984 | 10 | 296 | Shaw, Brewster H., Jr. | 1978 | 8 |
| 47 | Bursch, Daniel W. | 1990 | 13 | 172 | Jemison, Mae C. | 1987 | 12 | 297 | Shepard, Alan B., Jr. | 1959 | 1 |
| 48 | Cabana, Robert D. | 1985 | 11 | 173 | Jernigan, Tamara E. | 1985 | 11 | 298 | Shepherd, William M. | 1984 | 10 |
| 49 | Cagle, Yvonne D. | 1996 | 16 | 174 | Jett, Brent W. | 1992 | 14 | 299 | Shriver, Loren J. | 1978 | 8 |
| 50 | Caldeiro, Fernando (Frank) | 1996 | 16 | 175 | Johnson, Gregory C. | 1998 | 17 | 300 | Slayton, Donald K. | 1959 | 1 |
| 51 | Caldwell, Tracy E. | 1998 | 17 | 176 | Johnson, Gregory H. | 1998 | 17 | 301 | Smith, Michael J. | 1980 | 9 |
| 52 | Camarda, Charles J. | 1996 | 16 | 177 | Jones, Thomas D. | 1990 | 13 | 302 | Smith, Steven L. | 1992 | 14 |
| 53 | Cameron, Kenneth D. | 1984 | 10 | 178 | Kanai, Norishige | 2009 | 20 | 303 | Spring, Sherwood C. | 1980 | 9 |
| 54 | Cardman, Zena | 2017 | 22 | 179 | Kavandi, Janet L. | 1995 | 15 | 304 | Springer, Robert C. | 1980 | 9 |
| 55 | Carey, Duane G. | 1996 | 16 | 180 | Kelly, James M. | 1996 | 16 | 305 | Stafford, Thomas P. | 1962 | 2 |
| 56 | Carpenter, M. Scott | 1959 | 1 | 181 | Kelly, Mark E. | 1996 | 16 | 306 | Stefanyshyn-Piper, Heidemarie M. | 1996 | 16 |
| 57 | Carr, Gerald P. | 1966 | 5 | 182 | Kelly, Scott J. | 1996 | 16 | 307 | Stewart, Robert L. | 1978 | 8 |
| 58 | Carter, Manley Lanier, Jr. | 1984 | 10 | 183 | Kerwin, Joseph P. | 1965 | 4 | 308 | Stott, Nicole P. | 2000 | 18 |
| 59 | Casper, John H. | 1984 | 10 | 184 | Kilrain, Susan L. | 1995 | 15 | 309 | Sturckow, Frederick W. | 1995 | 15 |
| 60 | Cassada, Josh A. | 2013 | 21 | 185 | Kim, Jonny | 2017 | 22 | 310 | Sullivan, Kathryn D. | 1978 | 8 |
| 61 | Cassidy, Christopher J. | 2004 | 19 | 186 | Kimbrough, Robert S. | 2004 | 19 | 311 | Swanson, Steven R. | 1998 | 17 |
| 62 | Cernan, Eugene A. | 1963 | 3 | 187 | Koch, Christina Hammock | 2013 | 21 | 312 | Swigert, John L., Jr. | 1966 | 5 |
| 63 | Chaffee, Roger B. | 1963 | 3 | 188 | Kopra, Timothy L. | 2000 | 18 | 313 | Tani, Daniel M. | 1996 | 16 |
| 64 | Chamitoff, Gregory E. | 1998 | 17 | 189 | Kregel Kevin R. | 1992 | 14 | 314 | Tanner, Joseph R. | 1992 | 14 |
| 65 | Chang-Diaz, Franklin R. | 1980 | 9 | 190 | Kulin, Robb | 2017 | 22 | 315 | Thagard, Norman E. | 1978 | 8 |
| 66 | Chapman, Philip K. | 1967 | 6 | 191 | Lawrence, Wendy B. | 1992 | 14 | 316 | Thomas, Andrew S. W. | 1992 | 14 |
| 67 | Chari, Raja | 2017 | 22 | 192 | Lee, Mark C. | 1984 | 10 | 317 | Thomas, Donald A. | 1990 | 13 |
| 68 | Chawla, Kalpana | 1995 | 15 | 193 | Leestma, David C. | 1980 | 9 | 318 | Thorne, Stephen D. | 1985 | 11 |
| 69 | Chiao, Leroy | 1990 | 13 | 194 | Lenoir, William B. | 1967 | 6 | 319 | Thornton, Kathryn C. | 1984 | 10 |
| 70 | Chilton, Kevin P. | 1987 | 12 | 195 | Lind, Don L. | 1966 | 5 | 320 | Thornton, William E. | 1967 | 6 |
| 71 | Clark, Laurel B. | 1996 | 16 | 196 | Lindgren, Kjell N. | 2009 | 20 | 321 | Thuot, Pierre J. | 1985 | 11 |
| 72 | Cleave, Mary L. | 1980 | 9 | 197 | Lindsey, Steven W. | 1995 | 15 | 322 | Tingle, Scott D. | 2009 | 20 |
| 73 | Clifford, Michael R. | 1990 | 13 | 198 | Linenger, Jerry M. | 1992 | 14 | 323 | Truly, Richard H. | 1969 | 7 |
| 74 | Coats, Michael L. | 1978 | 8 | 199 | Linnehan, Richard M. | 1992 | 14 | 324 | Van Hoften, James D. A. | 1978 | 8 |
| 75 | Cockrell, Kenneth D. | 1990 | 13 | 200 | Llewellyn, John A. | 1967 | 6 | 325 | Vande Hei, Mark T. | 2009 | 20 |
| 76 | Coleman, Catherine G. | 1992 | 14 | 201 | Lockhart, Paul S. | 1996 | 16 | 326 | Veach, Charles Lacy | 1984 | 10 |
| 77 | Collins, Eileen M. | 1990 | 13 | 202 | Lopez-Alegria, Michael E. | 1992 | 14 | 327 | Virts, Terry W., Jr. | 2000 | 18 |
| 78 | Collins, Michael | 1963 | 3 | 203 | Loria, Christopher J. | 1996 | 16 | 328 | Voss, James S. | 1987 | 12 |
| 79 | Conrad, Charles, Jr. | 1962 | 2 | 204 | Lounge, John M. | 1980 | 9 | 329 | Voss, Janice E. | 1990 | 13 |
| 80 | Cooper, L. Gordon, Jr. | 1959 | 1 | 205 | Lousma, Jack R. | 1966 | 5 | 330 | Walheim, Rex J. | 1996 | 16 |
| 81 | Covey, Richard O. | 1978 | 8 | 206 | Love, Stanley G. | 1998 | 17 | 331 | Walker, David M. | 1978 | 8 |
| 82 | Creamer, Timothy J. | 1998 | 17 | 207 | Lovell, James A., Jr. | 1962 | 2 | 332 | Walker, Shannon | 2004 | 19 |
| 83 | Creighton, John O. | 1978 | 8 | 208 | Low, G. David | 1984 | 10 | 333 | Walz, Carl E. | 1990 | 13 |
| 84 | Crippen, Robert L. | 1969 | 7 | 209 | Lu, Edward T. | 1995 | 15 | 334 | Watkins, Jesica | 2017 | 22 |
| 85 | Culbertson, Frank L., Jr. | 1984 | 10 | 210 | Lucid, Shannon W. | 1978 | 8 | 335 | Weber, Mary E. | 1992 | 14 |
| 86 | Cunningham, Walter | 1963 | 3 | 211 | Magnus, Sandra H. | 1996 | 16 | 336 | Weitz, Paul J. | 1966 | 5 |
| 87 | Curbeam, Robert L., Jr. | 1995 | 15 | 212 | Mann, Nicole Aunapu | 2013 | 21 | 337 | Wetherbee, James D. | 1984 | 10 |
| 88 | Currie, Nancy J. | 1990 | 13 | 213 | Marshburn, Thomas H. | 2004 | 19 | 338 | Wheelock, Douglas H. | 1998 | 17 |
| 89 | Davis, N. Jan | 1987 | 12 | 214 | Massimino, Michael J. | 1996 | 16 | 339 | White, Edward H., II | 1962 | 2 |
| 90 | Dominick, Matthew | 2017 | 22 | 215 | Mastracchio, Richard A. | 1996 | 16 | 340 | Whitson, Peggy A. | 1996 | 16 |
| 91 | Drew, Alvin B. | 2000 | 18 | 216 | Mattingly, Thomas K., II | 1966 | 5 | 341 | Wilcutt, Terrence W. | 1990 | 13 |
| 92 | Duffy, Brian | 1985 | 11 | 217 | McArthur, K. Megan | 2000 | 18 | 342 | Williams, Clifton C., Jr. | 1963 | 3 |
| 93 | Duke, Charles M., Jr. | 1966 | 5 | 218 | McArthur, William S., Jr. | 1990 | 13 | 343 | Williams, Donald E. | 1978 | 8 |
| 94 | Dunbar, Bonnie J. | 1980 | 9 | 219 | McBride, Jon A. | 1978 | 8 | 344 | Williams, Jeffrey N. | 1996 | 16 |
| 95 | Dutton, James P. | 2004 | 19 | 220 | McCandless, Bruce, II | 1966 | 5 | 345 | Williams, Sunita L. | 1998 | 17 |
| 96 | Edwards, Joe F., Jr. | 1995 | 15 | 221 | Mcclain, Anne C. | 2013 | 21 | 346 | Wilmore, Barry E. | 2000 | 18 |
| 97 | Eisele, Donn F. | 1963 | 3 | 222 | McCool, William C. | 1996 | 16 | 347 | Wilson, Stephanie D. | 1996 | 16 |
| 98 | England, Anthony W. | 1967 | 6 | 223 | McCulley, Michael J. | 1984 | 10 | 348 | Wiseman, Gregory R. | 2009 | 20 |
| 99 | Engle, Joe H. | 1966 | 5 | 224 | McDivitt, James A. | 1962 | 2 | 349 | Wisoff, Peter J. K. | 1990 | 13 |
| 100 | Epps, Jeanette J. | 2009 | 20 | 225 | McMonagle, Donald R. | 1987 | 12 | 350 | Wolf, David A. | 1990 | 13 |
| 101 | Evans, Ronald E. | 1966 | 5 | 226 | McNair, Ronald E. | 1978 | 8 | 351 | Woodward, Neil W., III | 1998 | 17 |
| 102 | Fabian, John M. | 1978 | 8 | 227 | Meade, Carl J. | 1985 | 11 | 352 | Worden, Alfred M. | 1966 | 5 |
| 103 | Ferguson, Christopher J. | 1998 | 17 | 228 | Meir, Jessica U. | 2013 | 21 | 353 | Young, John W. | 1962 | 2 |
| 104 | Feustel, Andrew J. | 2000 | 18 | 229 | Melnick, Bruce E. | 1987 | 12 | 354 | Yui, Kimiya | 2009 | 20 |
| 105 | Fincke, E. Michael | 1996 | 16 | 230 | Melroy, Pamela A. | 1995 | 15 | 355 | Zamka, George D. | 1998 | 17 |
| 106 | Fischer, Jack D. | 2009 | 20 | 231 | Melvin, Leland D. | 1998 | 17 | ||||
| 107 | Fisher, Anna L. | 1978 | 8 | 232 | Metcalf-Lindenburger, Dorothy M. | 2004 | 19 | ||||
| 108 | Fisher, William F. | 1980 | 9 | 233 | Michel, F. Curtis | 1965 | 4 | ||||
| 109 | Foale, C. Michael | 1987 | 12 | 234 | Mitchell, Edgar D. | 1966 | 5 | ||||
| 110 | Ford, Kevin A. | 2000 | 18 | 235 | Moghbeli, Jasmin | 2017 | 22 | ||||
| 111 | Foreman, Michael J. | 1998 | 17 | 236 | Morgan, Andrew R | 2013 | 21 | ||||
| 112 | Forrester, Patrick G. | 1996 | 16 | 237 | Morgan, Barbara R. | 1998 | 17 | ||||
| 113 | Fossum, Michael E. | 1998 | 17 | 238 | Morin, Lee M. | 1996 | 16 | ||||
| 114 | Freeman, Theodore C. | 1963 | 3 | 239 | Mullane, Richard M. | 1978 | 8 | ||||
| 115 | Frick, Stephen N. | 1996 | 16 | 240 | Musgrave, Story | 1967 | 6 | ||||
| 116 | Fullerton, Charles G. | 1969 | 7 | 241 | Nagel, Steven R. | 1978 | 8 | ||||
| 117 | Garan, Ronald J., Jr. | 2000 | 18 | 242 | Nelson, George D. | 1978 | 8 | ||||
| 118 | Gardner, Dale A. | 1978 | 8 | 243 | Newman, James H. | 1990 | 13 | ||||
| 119 | Gardner, Guy S. | 1980 | 9 | 244 | Noriega, Carlos I. | 1995 | 15 | ||||
| 120 | Garriott, Owen K. | 1965 | 4 | 245 | Nowak, Lisa M. | 1996 | 16 | ||||
| 121 | Gemar, Charles D. | 1985 | 11 | 246 | Nyberg, Karen L. | 2000 | 18 | ||||
| 122 | Gernhardt, Michael L. | 1992 | 14 | 247 | Ochoa, Ellen | 1990 | 13 | ||||
| 123 | Gibson, Edward G. | 1965 | 4 | 248 | O’Connor, Bryan D. | 1980 | 9 | ||||
| 124 | Gibson, Robert L. | 1978 | 8 | 249 | Oefelein, William A. | 1998 | 17 | ||||
| 125 | Givens, Edward G., Jr. | 1966 | 5 | 250 | O’Hara, Loral | 2017 | 22 |