Dear Ms. Stone,
Thank you for posting your question on History Hub!
We suggest that you review NARA’s "Resources for Genealogists" page: https://www.archives.gov/research/genealogy/start-research/nara-resources , as well as the History Hub Blog titled Suggestions and Advice for Family History Researchers. Also, the FamilySearch Research wiki for United States Genealogy may be useful.
We suggest you first look at decennial Census records. Information about census records can be found on our website at https://www.archives.gov/research/genealogy/census/about. Many of these records have been digitized and are available through our partners. For additional information about accessing these records, you can visit our website. You may wish to search Ancestry or FamilySearch for the U.S. Census. There may be a fee for using Ancestry. Instead, please check for access at your local library as many library systems subscribe to these sites, making them free for their patrons.
We suggest that you search the census records using any nicknames or alternative names. For example, "Lena" is a nickname for Evalina and "Rob" for Robert. We also suggest you focus on the husband and children when searching the census as you might be able to locate their names more easily. Sometimes with early Census records the names recorded were nicknames, initials, incorrectly spelled names, etc.
We hope this information helps you in your research!