Background and aims: Pig farms on litter or with outdoor access (alternative farms) are widely popular with consumers and citizens, particularly for reasons of animal welfare. However, parasitism may constitute a critical point in these kinds of farms. This study aimed to identify the herd factors associated with the level of parasite infestation. Methods: A study was carried out in 112 alternative French pig farms where faecal samples were taken from 10 sows, 10 pigs aged 10-12 weeks and/or 10 pigs at the end of the fattening period for coprological analysis, as well as blood samples from 10 sows and/or 10 pigs at the end of fattening period for serological analysis for Ascaris suum and Toxoplasma gondii. Data on the facilities and management of the farm were collected during the on-farm visit and were analyzed using principal component analysis to determine farm profiles regarding infestation and farm characteristics. Results: Coccidia oocysts were observed in pig faeces in the largest proportion of farms (84%) followed by eggs of strongyles (55%), Trichuris suis (32%) and A. suum (16%). The rates of A. suum and T. gondii seropositive farms were 89% and 71% respectively. Hygiene and especially decontamination of facilities were factors associated with low levels of parasitism in farms. Conversely, keeping animals outdoors or on litter, poor building maintenance, farms with small numbers of animals and summer were parameters associated with high levels of parasitism. The use of multiple anthelmintic treatments on growing pigs was associated with low levels of T. suis egg infestation and high levels of A. suum seroprevalence. Conclusion: This study highlighted the internal parasite burden in alternative farms. Even if some factors are not under farmers’ control (season, outdoor rearing), there is still some room for improvement via hygiene and appropriate use of treatments.