A useful place to start for data about cesarean deliveries is the CDC, which provides annual FastStats on the method of delivery (vaginal or cesarean), with usually about a two-year lag from the present year. The agency also has a page of individual states’ cesarean delivery rates. Clicking on a particular state opens a few additional pregnancy/birth stats by state(births to unmarried mothers and the preterm birth, teen birth and low birth weight rates).
These stats are updated each year with published National Vital Statistics Reports (NVSRs), such as this 2019 one about 2018 data, that offer more detail about the data. The National Center for Health Statistics also publishes less frequent NVSRs for maternal morbidity by delivery method.
When reporting on cesarean deliveries, it’s important to note the difference between primary (first-time) cesarean rates and overall rates: After one cesarean delivery, most women’s subsequent pregnancies also result in cesarean deliveries, so the primary and overall numbers can differ meaningfully. Another distinction is “low-risk” pregnancy cesarean delivery rates, which refer to the rate for first-born, full-term infants born by themselves (not twins or other multiples), head-first. The term for these births is nulliparous (the mother’s first pregnancy resulting in childbirth), (full-)term, singleton, vertex (head first), or NTSV.
Obtaining more granular than state-level statistics can be difficult but worthwhile because rates vary by hospital more than by nearly any other factor, as this 2018 Consumer Reportspackage covers. That story relied on data collected primarily from The Leapfrog Group, which collects hospitals’ voluntarily reported data on NTSV cesarean rates. The Group provides a page for searching and comparing hospitals but would need to be contacted for complete data sets. The March of Dimes Peristats database also breaks down Delivery Method by total cesarean sections, primary cesarean sections, vaginal births after cesarean sections (VBAC), and repeat cesarean sections.
International cesarean rates by country can be searched or downloaded at the World Health Organization. Another source of international cesarean rates is the Organisation for Economic Co-operation and Development (OECD), a group of 36 countries that focuses on economic policy and trade. Among their health stats are cesarean rates across member countries.
Finally, the American College of Obstetricians and Gynecologists (ACOG) provides resources on cesarean delivery in general, and the website cesareanrates.org has a page of links to various stats on birth/delivery and birth interventions.