This dataset is a supplement to the article "Non-State Actors and Social Protection Measures During Emergencies across Selected Southwest Nigerian States: Towards an Integrated Approach to Social Protection" (Lectio Socialis, DOI: 10.47478/lectio.1898601). It contains the anonymised quantitative survey dataset (n = 892 respondents, collected via KoboCollect), an accompanying codebook, and an anonymised thematic coding summary of twelve key-informant interviews with representatives of non-state actors in Ekiti and Ondo States, Nigeria. Identifying information (names, precise GPS coordinates, exact timestamps, and interviewer/submission identifiers) has been removed from the quantitative dataset; interview participants are described only by generalised role and state. Full methodology and ethics information are provided in the accompanying README. Data are shared under a CC BY 4.0 licence, except where noted.