Ethical Guidelines for Statistical Practice - Principles laid out by the American Statistical Association intended to to help statistical practitioners make decisions ethically.
Four Levels of Ethical Engagement in Mathematics - Article categorizing the four levels, really 5 with level 0: Believing there is no ethics in mathematics) of ethical engagement in the mathematical sciences: Realizing there are ethical issues inherent in mathematics, Doing something: speaking out to other mathematicians, Taking a seat at the tables of power, and Calling out the bad mathematics of others.
Thicker than blood : how racial statistics lie - Amazing book from Tukufu Zuberi about the historical connections between the development of the idea of race and the birth of social statistics. In it Zuberi describes the ways race-differentiated data are misinterpreted in the social sciences and asks searching questions about how racial statistics are used.
The Ethics of Mathematics: Is Mathematics Harmful? - A study of three ways in which mathematics can be harmful for people, both at the individual and societal level: the ways mathematical thinking can cause harm outside of mathematics, how applications can damage humanity, and the ways the mathematics education system can damage students.
Statistics and Ethics: Some Advice for Young Statisticians - A letter to young statisticians about the nature of statistics and their responsibilities as members of the statistical profession.
The Cambridge University Ethics in Mathematics Project - Information about the University of Cambridge's math ethics project, including their course, case studies, publications, and conferences.
Ethics in Mathematics and Statistics Reading List - In depth list of publications about ethics in mathematics and statistics culture, practice, education, and sub-disciplines such as cryptography.