Drawing from social capital theory, this study assessed the relevance of existing conceptions of social capital-largely from the United States and Canada-in the Mexican context, in an effort to contribute novel variables to the street-children literature. Using a cross-sectional survey design, 204 mothers of street-working and non-working children were interviewed within one community in Monterrey, Nuevo Le6n, Mexico. Factor analysis was used to corroborate the internal construct validity of two dimensions of social capital: family social capital and community social capital. Findings reveal that culture can play an influential role in how social capital indicators are defined and measured.