# List of Houston Astros minor league affiliates

The Houston Astros farm system consists of seven Minor League Baseball affiliates across the United States and in the Dominican Republic. Six teams are owned by the major league club, while the Asheville Tourists are independently owned.
The Astros have been affiliated with the Double-A Corpus Christi Hooks of the Texas League since 2005, making it the longest-running active affiliation in the organization. The longest continuous affiliation in team history was the 21-year relationship with the Double-A Southern League's Columbus Astros/Mudcats from 1970 to 1990. Their newest affiliates are the Triple-A Sugar Land Space Cowboys of the Pacific Coast League and the High-A Asheville Tourists of the South Atlantic League, which became Astros affiliates in 2021.
Geographically, Houston's closest domestic affiliate is the Sugar Land Space Cowboys, which are approximately 20 miles (32 km) away. Houston's furthest domestic affiliate is the Single-A Fayetteville Woodpeckers of the Carolina League some 1,165 miles (1,875 km) away.

## Current affiliates

The Houston Astros farm system consists of seven minor league affiliates.
| Class | Team | League | Location | Ballpark | Affiliated |
| Triple-A | Sugar Land Space Cowboys | Pacific Coast League | Sugar Land, Texas | Constellation Field | 2021 |
| Double-A | Corpus Christi Hooks | Texas League | Corpus Christi, Texas | Whataburger Field | 2005 |
| High-A | Asheville Tourists | South Atlantic League | Asheville, North Carolina | McCormick Field | 2021 |
| Single-A | Fayetteville Woodpeckers | Carolina League | Fayetteville, North Carolina | Segra Stadium | 2017 |
| Rookie | FCL Astros | Florida Complex League | West Palm Beach, Florida | The Ballpark of the Palm Beaches | 2023 |
| Rookie | DSL Astros Blue | Dominican Summer League | Boca Chica, Santo Domingo | Houston Astros Complex | 2022 |
| Rookie | DSL Astros Orange | Dominican Summer League | Boca Chica, Santo Domingo | Houston Astros Complex | 2022 |

## Past affiliates
### Key

| Season | Each year is linked to an article about that particular Astros/Colt .45s season. |

### 1962

Minor League Baseball operated with six classes (Triple-A, Double-A, Class A, Class B, Class C, and Class D) in 1962.
| Season | Triple-A | Double-A | Class A | Class B | Class C | Class D | Ref. |
| 1962 | Oklahoma City 89ers | — | — | Durham Bulls | Modesto Colts | Moultrie Colt .22s | |

### 1963–1989

Prior to the 1963 season, Major League Baseball (MLB) initiated a reorganization of Minor League Baseball that resulted in a reduction from six classes to four (Triple-A, Double-A, Class A, and Rookie) in response to the general decline of the minors throughout the 1950s and early-1960s when leagues and teams folded due to shrinking attendance caused by baseball fans' preference for staying at home to watch MLB games on television. The only change made within the next 27 years was Class A being subdivided for the first time to form Class A Short Season in 1966.
| Season | Triple-A | Double-A | Class A | Class A Short Season | Rookie |
| 1963 | Oklahoma City 89ers | San Antonio Bullets | Durham Bulls Modesto Colts Moultrie Colt .22s | — | — |
| 1964 | Oklahoma City 89ers | San Antonio Bullets | Durham Bulls Modesto Colts | — | Cocoa Colts |
| 1965 | Oklahoma City 89ers | Amarillo Sonics | Cocoa Astros Durham Bulls Salisbury Astros | — | FRL Astros |
| 1966 | Oklahoma City 89ers | Amarillo Sonics | Cocoa Astros Durham Bulls Salisbury Astros | Bismarck-Mandan Pards | — |
| 1967 | Oklahoma City 89ers | Amarillo Sonics | Asheville Tourists Cocoa Astros | — | Covington Astros |
| 1968 | Oklahoma City 89ers | Dallas–Fort Worth Spurs | Cocoa Astros Greensboro Patriots | — | Covington Astros |
| 1969 | Oklahoma City 89ers | Savannah Senators | Cocoa Astros Peninsula Astros | Williamsport Astros | Covington Astros |
| 1970 | Oklahoma City 89ers | Columbus Astros | Cocoa Astros | Williamsport Astros | Covington Astros |
| 1971 | Oklahoma City 89ers | Columbus Astros | Cocoa Astros Sumter Astros | — | Covington Astros |
| 1972 | Oklahoma City 89ers | Columbus Astros | Cocoa Astros | — | Cocoa Astros Covington Astros |
| 1973 | Denver Bears | Columbus Astros | Cedar Rapids Astros | — | Covington Astros |
| 1974 | Denver Bears | Columbus Astros | Cedar Rapids Astros | — | Covington Astros |
| 1975 | Iowa Oaks | Columbus Astros | Dubuque Packers | — | Covington Astros |
| 1976 | Memphis Blues | Columbus Astros | Dubuque Packers | — | Covington Astros |
| 1977 | Charleston Charlies | Columbus Astros | Cocoa Astros | — | GCL Astros |
| 1978 | Charleston Charlies | Columbus Astros | Daytona Beach Astros | — | GCL Astros |
| 1979 | Charleston Charlies | Columbus Astros | Daytona Beach Astros | — | GCL Astros |
| 1980 | Tucson Toros | Columbus Astros | Daytona Beach Astros | — | GCL Astros Blue GCL Astros Orange |
| 1981 | Tucson Toros | Columbus Astros | Daytona Beach Astros | — | GCL Astros Blue GCL Astros Orange |
| 1982 | Tucson Toros | Columbus Astros | Asheville Tourists Daytona Beach Astros | Auburn Astros | GCL Astros |
| 1983 | Tucson Toros | Columbus Astros | Asheville Tourists Daytona Beach Astros | Auburn Astros | GCL Astros |
| 1984 | Tucson Toros | Columbus Astros | Asheville Tourists Daytona Beach Astros | Auburn Astros | GCL Astros |
| 1985 | Tucson Toros | Columbus Astros | Asheville Tourists Osceola Astros | Auburn Astros | GCL Astros |
| 1986 | Tucson Toros | Columbus Astros | Asheville Tourists Osceola Astros | Auburn Astros | GCL Astros |
| 1987 | Tucson Toros | Columbus Astros | Asheville Tourists Osceola Astros | Auburn Astros | GCL Astros |
| 1988 | Tucson Toros | Columbus Astros | Asheville Tourists Osceola Astros | Auburn Astros | GCL Astros |
| 1989 | Tucson Toros | Columbus Mudcats | Asheville Tourists Osceola Astros | Auburn Astros | GCL Astros DSL Astros/Rangers/White Sox |

### 1990–2020

Minor League Baseball operated with six classes from 1990 to 2020. In 1990, the Class A level was subdivided for a second time with the creation of Class A-Advanced. The Rookie level consisted of domestic and foreign circuits.
| Season | Triple-A | Double-A | Class A-Advanced | Class A | Class A Short Season | Rookie | Foreign Rookie |
| 1990 | Tucson Toros | Columbus Mudcats | Osceola Astros | Asheville Tourists | Auburn Astros | GCL Astros | DSL Astros/Cardinals |
| 1991 | Tucson Toros | Jackson Generals | Osceola Astros | Asheville Tourists | Auburn Astros | GCL Astros | DSL Astros |
| 1992 | Tucson Toros | Jackson Generals | Osceola Astros | Asheville Tourists Burlington Astros | Auburn Astros | GCL Astros | DSL Astros |
| 1993 | Tucson Toros | Jackson Generals | Osceola Astros | Asheville Tourists Quad Cities River Bandits | Auburn Astros | GCL Astros | DSL Astros DSL Astros/Giants/Phillies |
| 1994 | Tucson Toros | Jackson Generals | Osceola Astros | Quad Cities River Bandits | Auburn Astros | GCL Astros | DSL Astros/Brewers |
| 1995 | Tucson Toros | Jackson Generals | Kissimmee Cobras | Quad Cities River Bandits | Auburn Astros | GCL Astros | DSL Astros/Brewers |
| 1996 | Tucson Toros | Jackson Generals | Kissimmee Cobras | Quad Cities River Bandits | Auburn Doubledays | GCL Astros | DSL Astros/Red Sox |
| 1997 | New Orleans Zephyrs | Jackson Generals | Kissimmee Cobras | Quad Cities River Bandits | Auburn Doubledays | GCL Astros | DSL Astros |
| 1998 | New Orleans Zephyrs | Jackson Generals | Kissimmee Cobras | Quad Cities River Bandits | Auburn Doubledays | GCL Astros | DSL Astros |
| 1999 | New Orleans Zephyrs | Jackson Generals | Kissimmee Cobras | Michigan Battle Cats | Auburn Doubledays | Martinsville Astros | DSL Astros |
| 2000 | New Orleans Zephyrs | Round Rock Express | Kissimmee Cobras | Michigan Battle Cats | Auburn Doubledays | Martinsville Astros | DSL Astros |
| 2001 | New Orleans Zephyrs | Round Rock Express | — | Lexington Legends Michigan Battle Cats | Pittsfield Astros | Martinsville Astros | DSL Astros |
| 2002 | New Orleans Zephyrs | Round Rock Express | — | Lexington Legends Michigan Battle Cats | Tri-City ValleyCats | Martinsville Astros | DSL Astros VSL Venoco |
| 2003 | New Orleans Zephyrs | Round Rock Express | Salem Avalanche | Lexington Legends | Tri-City ValleyCats | Martinsville Astros | DSL Astros VSL Venoco |
| 2004 | New Orleans Zephyrs | Round Rock Express | Salem Avalanche | Lexington Legends | Tri-City ValleyCats | Greeneville Astros | DSL Astros VSL Venoco 1 |
| 2005 | Round Rock Express | Corpus Christi Hooks | Salem Avalanche | Lexington Legends | Tri-City ValleyCats | Greeneville Astros | DSL Astros VSL Astros |
| 2006 | Round Rock Express | Corpus Christi Hooks | Salem Avalanche | Lexington Legends | Tri-City ValleyCats | Greeneville Astros | DSL Astros VSL Astros |
| 2007 | Round Rock Express | Corpus Christi Hooks | Salem Avalanche | Lexington Legends | Tri-City ValleyCats | Greeneville Astros | DSL Astros VSL Astros |
| 2008 | Round Rock Express | Corpus Christi Hooks | Salem Avalanche | Lexington Legends | Tri-City ValleyCats | Greeneville Astros | DSL Astros VSL Astros |
| 2009 | Round Rock Express | Corpus Christi Hooks | Lancaster JetHawks | Lexington Legends | Tri-City ValleyCats | Greeneville Astros GCL Astros | DSL Astros |
| 2010 | Round Rock Express | Corpus Christi Hooks | Lancaster JetHawks | Lexington Legends | Tri-City ValleyCats | Greeneville Astros GCL Astros | DSL Astros |
| 2011 | Oklahoma City RedHawks | Corpus Christi Hooks | Lancaster JetHawks | Lexington Legends | Tri-City ValleyCats | Greeneville Astros GCL Astros | DSL Astros |
| 2012 | Oklahoma City RedHawks | Corpus Christi Hooks | Lancaster JetHawks | Lexington Legends | Tri-City ValleyCats | Greeneville Astros GCL Astros | DSL Astros |
| 2013 | Oklahoma City RedHawks | Corpus Christi Hooks | Lancaster JetHawks | Quad Cities River Bandits | Tri-City ValleyCats | Greeneville Astros GCL Astros | DSL Astros |
| 2014 | Oklahoma City RedHawks | Corpus Christi Hooks | Lancaster JetHawks | Quad Cities River Bandits | Tri-City ValleyCats | Greeneville Astros GCL Astros | DSL Astros Blue DSL Astros Orange |
| 2015 | Fresno Grizzlies | Corpus Christi Hooks | Lancaster JetHawks | Quad Cities River Bandits | Tri-City ValleyCats | Greeneville Astros GCL Astros | DSL Astros Blue DSL Astros Orange |
| 2016 | Fresno Grizzlies | Corpus Christi Hooks | Lancaster JetHawks | Quad Cities River Bandits | Tri-City ValleyCats | Greeneville Astros GCL Astros | DSL Astros Blue DSL Astros Orange |
| 2017 | Fresno Grizzlies | Corpus Christi Hooks | Buies Creek Astros | Quad Cities River Bandits | Tri-City ValleyCats | Greeneville Astros GCL Astros | DSL Astros Blue DSL Astros Orange |
| 2018 | Fresno Grizzlies | Corpus Christi Hooks | Buies Creek Astros | Quad Cities River Bandits | Tri-City ValleyCats | GCL Astros | DSL Astros |
| 2019 | Round Rock Express | Corpus Christi Hooks | Fayetteville Woodpeckers | Quad Cities River Bandits | Tri-City ValleyCats | GCL Astros | DSL Astros |
| 2020 | Round Rock Express | Corpus Christi Hooks | Fayetteville Woodpeckers | Quad Cities River Bandits | Tri-City ValleyCats | GCL Astros | DSL Astros DSL Astros |

### 2021–present

The current structure of Minor League Baseball is the result of an overall contraction of the system beginning with the 2021 season. Class A was reduced to two levels: High-A and Low-A. Low-A was reclassified as Single-A in 2022.
| Season | Triple-A | Double-A | High-A | Single-A | Rookie | Foreign Rookie |
| 2021 | Sugar Land Skeeters | Corpus Christi Hooks | Asheville Tourists | Fayetteville Woodpeckers | FCL Astros | DSL Astros |
| 2022 | Sugar Land Space Cowboys | Corpus Christi Hooks | Asheville Tourists | Fayetteville Woodpeckers | FCL Astros Blue FCL Astros Orange | DSL Astros Blue DSL Astros Orange |
| 2023 | Sugar Land Space Cowboys | Corpus Christi Hooks | Asheville Tourists | Fayetteville Woodpeckers | FCL Astros | DSL Astros Blue DSL Astros Orange |
| 2024 | Sugar Land Space Cowboys | Corpus Christi Hooks | Asheville Tourists | Fayetteville Woodpeckers | FCL Astros | DSL Astros Blue DSL Astros Orange |