Senior inspector, also police senior inspector or senior inspector of police or Police Captain, is a police rank. The rank or position varies in seniority depending on the organization that uses it.

In Bosnia's Police of Republika Srpska, senior inspector is lower than an independent inspector but higher than a full inspector.

Royal Brunei Police Force use this rank, and it was lower than an assistant superintendent and higher than a full inspector.

In Bulgarian police, was higher than an inspector first grade while lower than a police

The Estonian Police and Border Guard Board use this rank, it was below a chief inspector, but higher than a full inspector.

In Germany's Bundespolizei (Federal Police), it was lower than a chief inspector and higher than a full inspector.

In Hong Kong, like in the Philippines, senior inspector is lower than a chief inspector, but higher than a full inspector.

Lesotho Mounted Police Service's version of the rank, it was lower than an superintendent and higher than a full inspector.