| Birth Date: | 13 November 1968 |
| Birth Place: | Prague, Czechoslovakia |
Irena Machovcak (born 13 November 1968 in Prague, Czechoslovakia) is a retired volleyball player, who represented the Netherlands at two consecutive Summer Olympics, starting in 1992.
Machovcak was one of the more experienced members of the Netherlands national team that won the gold medal at the 1995 European Championship by defeating Croatia 3–0 in the final.