There is scarce empirical evidence examining whether sexual initiation and power are associated with each other. Utilizing latent profile analyses, we examined in a nationally representative sample of US newlywed heterosexual couples (N = 1,948 couples) whether wives' and husbands' sexual initiation patterns and satisfaction with these patterns were associated with membership in different profiles of wives' and husbands' perceptions of shared relational power while accounting for both partner's satisfaction with sexual frequency. We found four profiles of wives' and husbands' perceptions of power. The most common profile was when both wives and husbands perceived high levels of power compared to other profiles, but wives had significantly higher reports of perceived power than husbands (High Power, Wife Higher; 40.8%). Husbands' sexual initiation patterns were not associated with profile membership. Wives who reported equal sexual initiation patterns had a higher probability of being in the High Power, Wife Higher profile compared to the Wife Low Power, Husband Moderate Power profile. Both wives' and husbands' satisfaction with sexual initiation patterns were associated with profile membership. Wives and husbands that were satisfied with sexual initiation patterns had a higher probability of being in the High Power, Wife Higher profile compared to the profile where both wives and husbands had high perceptions of shared relational power compared to other profiles, but their scores were not significantly different from each other (High Power, Equal).