The present study examines the variable presence/absence of third person plural marking on French verbs in the speech of French immersion students. The analysis considers both linguistic and social factors that condition variation and compares results with those found for native speakers of French. The principle findings are that agreement marking in the speech of immersion students is comparable to that of native Francophones whose use of French is restricted. The only social factor found to condition variation is amount of French language schooling. Several linguistic factors condition variation. Some of these are also found in restricted native speaker French, while others are particular to the immersion students.