Is there a single-word term for "Number of employees" as in "our company's number of employees"?
It might be called headcount. Per Wiktionary
- The number of people present in a group or employed by a company.
: a body of persons employed in an organization or place of work. Random House
The Orchestra, which boasts a personnel of 102 musicians, has long been considered one of Europe's finest.
The people engaged in or available for work, either in a country or area or in a particular company or industry. OED
I think you may use staff:
- [S, + sing/pl verb] the group of people who work for an organization: There is a good relationship between staff and pupils at the school.*
Our company's staff consist of ..(number).. workers/professionals.
Definition #4 of “payroll” from WordReference Random House Unabridged Dictionary of American English is close:
- the total number of people employed by a business firm or organization.
Strength is sometimes used to enumerate the number of personnel or staff in an organisation. It is mostly used in a military context, but it can be used in a civilian sense as well.
6: force as measured in numbers : effective numbers of any body or organization
(an army at full strength)