This data includes an entry for every member of Congress who served between January 1947 and February 2014. Entries include individuals' personal identifying information such as their name, age, bio guide, and birthday. For each individual, there are also details on their party, chamber, term start, the state represented, and which Congress they served on. We used this data to understand trends and distrubtions of congressperson's ages, by party, incumbency status and gender. Our results indicate that congress is, on average, older (average 49-57 years, depending on congress) than the US general population (average age 38 years), regardless of party, likely because the majority of congress is incumbents. We show that women in the house tend to be older than their male counterparts, but across the whole of congress after 1970s, there is little difference between the ages of men and women. We hope future work can address the new and different factors which may explain who is elected to congress, and why they are relatively old compared to the general US population.