Are Roman Catholic priests ever addressed as pastor?

Fr. Hardon, S.J.'s definition:

PASTOR
An individual priest or a corporate person (religious order or community) to whom a parish has been entrusted by a bishop, with the rights and responsibilities conferred by canon law and the statutes of the dioceses. (Etym. Latin pastor, shepherd; literally, feeder.)

Are Roman Catholic priests ever addressed as pastor?

The short answer is: Yes, but not in English.

Priests who are pastors, in English speaking counties are often referred to as pastors. The assistant pastor is called either the assistant pastor or the associate pastor. The signage in front of many Catholic churches bares this out.

However, it is also commonly accepted that pastors in English speaking countries should be addressed as father. I have never heard of a parish priest being referred to as Pastor "X" by any member of the faithful in English.

The title of Father is very commonly given to Secular Priests, as well as to Priests of Religious Orders and Congregations. - Ecclesiastical Addresses (Catholic Encyclopedia)

This is not so true in the French language, where priests who are pastors of a parish church are commonly referred to as Monsieur le Curé.

"Monsieur le Curé", being used for all parish priests. - Ecclesiastical Addresses (Catholic Encyclopedia)

Most Catholics have heard of St. John Vianney also known as the "Curé d'Ars". In France Parish priests are quite commonly called Monsieur le Curé or as one would say in English "Mister [the] Pastor".

St. Jean-Baptiste-Marie Vianney, T.O.S.F. (8 May 1786 – 4 August 1859), commonly known in English as Saint John Vianney, was a French parish priest who is venerated in the Catholic Church as a saint and as the patron saint of parish priests. He is often referred to as the "Curé d'Ars" (i.e. the parish priest of Ars), internationally known for his priestly and pastoral work in his parish in Ars, France, because of the radical spiritual transformation of the community and its surroundings. Catholics attribute this to his saintly life, mortification, persevering ministry in the sacrament of confession, and ardent devotion to the Blessed Virgin Mary. His feast day is 4 August.

The YouTube video in French on the life of the "Curé d'Ars" clearly bares this out: Le Sorcier Du Ciel. Although it is an older movie and in black and white, it is quite enjoyable to watch, especially if you understand French. It does have English subtitles for those interested.

While living in France, I would quite often addressee Catholic priests who were pastors as Monsieur le Curé or more affectionately as Mon Père.

The word Curé in French referrers to priest who is charge of a parish.

Curé

Prêtre qui a la charge d'une paroisse dans la religion catholique.

Synonymes : abbé, prêtre

Traduction anglais : parish priest

I managed to track down a Catholic web site which gives the following explanation, which I would like to share with you:

Pastor: This term denotes a priest who has the cure of souls (cura animarum), that is, who is bound in virtue of his office to promote the spiritual welfare of the faithful by preaching, administering the sacraments, and exercising certain powers of external government, e.g., the right of supervision, giving precepts, imposing light corrections — powers rather paternal in their nature, and differing from those of a bishop, which are legislative, judicial, and coactive. A pastor is properly called a parish-priest (parochus) when he exercises the cure of souls in his own name with regard to a determined number of subjects who are obliged to apply to him for the reception of certain sacraments specified in the law. In this article "parish-priest" is always taken in this strict sense.

The power to appoint pastors is ordinarily vested in the bishop. To pastors, who are not parish-priests, the right of assisting at marriages is given by the law as to parish-priests. The other rights usually are granted to them by the bishops and are defined in the particular laws; such is very commonly the case in the United States, England, and Scotland, with regard to baptism, holy viaticum, extreme unction, and funerals. Source: Pastor (Catholic Encyclopedia)

I am grateful to Matt Gutting for his speedy and clear response because I was working to a deadline and needed to submit my assignment before the end of today.