Primary aldosteronism (PA) is a severe form of autonomous aldosteronism. Milder forms of autonomous and renin-independent aldosteronism may be common, even in normotension. We characterized aldosterone secretion in 210 normotensives who had suppressed plasma renin activity (PRA<1.0 ng/mL/h), completed an oral sodium suppression test, received an infusion of angiotensin II (AngII), and had measurements of blood pressure (BP) and renal plasma flow (RPF). Continuous associations between urinary aldosterone excretion rate (AER), renin, and potassium handling were investigated. Severe autonomous aldosterone secretion that was consistent with confirmed PA was defined based on accepted criteria of an AER >12 mcg/24h with urinary sodium excretion >200 mmol/24h. Across the population, there were strong and significant associations between higher AER and higher urinary potassium excretion, higher AngII-stimulated aldosterone, and lower PRA, suggesting a continuum of renin-independent aldosteronism and mineralocorticoid receptor activity. Autonomous aldosterone secretion that fulfilled confirmatory criteria for PA was detected in 29 participants (14%). Normotensives with evidence suggestive of confirmed PA had higher 24h urinary AER (20.2±12.2 vs. 6.2±2.9 mcg/24h, P<0.001) as expected, but also higher AngII-stimulated aldosterone (12.4±8.6 vs. 6.6±4.3 ng/dL, P<0.001) and lower 24h urinary sodium-to-potassium excretion (2.69±0.65 vs. 3.69±1.50 mmol/mmol, P=0.001); however, there were no differences in age, aldosterone-to-renin ratio, BP, or RPF between the two groups. These findings indicate a continuum of renin-independent aldosteronism and mineralocorticoid receptor activity in normotension that ranges from subtle to overtly dysregulated and autonomous. Longitudinal studies are needed to determine whether this spectrum of autonomous aldosterone secretion contributes to hypertension and cardiovascular disease.