Camarasauridae was named by Cope (1877). Its type is Camarasaurus.

It was synonymized subjectively with Atlantosauridae by Hay (1902); it was synonymized subjectively with Morosauridae by Lull (1924), Bonaparte (1978); it was misspelled as Camarosauridae by Jaekel (1911), Hay (1930), Kuhn (1946), Lapparent (1947), Huene (1948), Kuhn (1966), Steel (1970), Swinton (1970), Rozhdestvensky (1977), Galton (1977), Borsuk-Bialynicka (1977), Bonaparte (1980), Kues et al. (1980), McIntosh (1981), Santafé et al. (1982), Dong et al. (1983), Russell (1984), Bonaparte (1986), Buscalioni and Sanz (1987), Jensen (1988), Carroll (1988), McIntosh (1990), Benton (1990), Molnar (1992), Upchurch (1995), Upchurch (1995), Hunt et al. (1995), McIntosh et al. (1996), Zhang and Chen (1996), McIntosh (1997), Salgado et al. (1997), Dong (1998), Bonaparte (1999), Upchurch et al. (2004), Chure et al. (2006), Moser et al. (2006), Sánchez-Hernández et al. (2007), Mocho et al. (2014), Mannion et al. (2019), Apesteguía et al. (2021).

It was assigned to Opisthocoelia by Cope (1883); to Bothrosauropodidae by Huene (1948); to Bothrosauropodoidea by Kuhn (1966); to Neosauropoda by Upchurch (1995), Upchurch (1995); to Sauropoda by Jaekel (1911), Molnar (1992), McIntosh (1997); to Camarasauroidea by Dong (1998); to Sauropoda by Steel (1970), Swinton (1970), Rozhdestvensky (1977), Galton (1977), Borsuk-Bialynicka (1977), Kues et al. (1980), Santafé et al. (1982), Dong et al. (1983), Russell (1984), Bonaparte (1986), Buscalioni and Sanz (1987), Jensen (1988), Carroll (1988), McIntosh (1990), Benton (1990), Hunt et al. (1995), McIntosh et al. (1996), Zhang and Chen (1996), Bonaparte (1999); to Sauropoda by Hay (1930), Kuhn (1946), Lapparent (1947), Bonaparte (1980), McIntosh (1981), Chure et al. (2006); to Camarasauromorpha by Salgado et al. (1997), Upchurch et al. (2004), Moser et al. (2006), Mocho et al. (2014); to Eusauropoda by Mannion et al. (2019); and to Macronaria by Sánchez-Hernández et al. (2007), Apesteguía et al. (2021).