Category:1866 in the United States

• 1866 in the United States by city (1 C)
• 1866 in the United States by month (10 C)
• 1866 in the United States by state or territory (49 C)

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• 1866 disestablishments in the United States (28 C, 14 P)
• 1866 establishments in the United States (48 C, 1 P)

C

• 1866 crimes in the United States (1 C, 1 P)

D

• 1866 disasters in the United States (5 P)

L

• 1866 in American law (4 C, 9 P)

N

• 1866 American novels (4 P)

P

• 1866 in American politics (3 C, 8 P)

S

• 1866 in American sports (1 C)