The study aimed to assess the trends and factors associated with modern contraceptive use among female youths (15–24 years) in Tanzania from 2004 to 2022.

We performed secondary analysis of cross-sectional data from four consecutive Demographic and Health Surveys (DHS) in Tanzania: 2004, 2010, 2015/2016 and 2022.

Tanzania.

Sexually active female youths (n=8659).

The use of any modern contraceptive method, coded as Yes or No.

The sample had a median age of 21 (IQR 18–22 years), with 63.7% aged 20–24 years. Modern contraceptive use among female youths increased from 24.6% in 2004 to 32.1% in 2022. Consistent across surveys, modern contraceptive use was positively associated with secondary or higher education level, having one or more live births and engaging in sexual activity within the month preceding the survey. Additionally, adolescents (15–19 years) demonstrated a weak protective association, indicating a reduced likelihood of modern contraceptive use compared with young women (20–24 years). In 2015/2016 and 2022 surveys, primiparous, multiparous and married/cohabiting women were more likely to use modern contraceptives than nulliparous women.

Modern contraceptive use among female youths increased gradually in Tanzania between 2004 and 2022 Tanzania DHS. To sustain these upward trends and reduce the risk of unwanted pregnancies and sexually transmitted infections, public health policies should consider the factors positively associated with modern contraceptive use, particularly among young women aged 20–24 years, married/cohabiting, who have initiated childbearing and those with high education levels.